Showing posts with label Andaman Sea. Show all posts
Showing posts with label Andaman Sea. Show all posts

Saturday, May 23, 2026

[Entomology • 2026] Teulisna breveprocessa & T. nicobara • Two New Species and A New Species Record of Genus Teulisna Walker (Lepidoptera: Erebidae: Arctiinae) from India


[1-2]. Teulisna breveprocessa sp. nov., Devikulam, Kerala, India;
[3] T. ruma (Swinhoe. 1889), Nilgiri, Tamil Nadu, India; [4] T. basigera (Walker [1865]), Tamil Nadu, India (NZCZSI); [5] T. inducta (Walker 1864), Naduvattam, Tamil Nadu, India;
[6-8]. T. nicobara sp. nov., Great Nicobar Islands, Govind Nagar, India.

S. Singh, N. Singh & Joshi, 2026 

Abstract
Two new species of the genus Teulisna Walker, 1862 (Lepidoptera: Erebidae: Lithosiina) are described from India: T. (Cossa) breveprocessa sp. nov. (from the Western Ghats of Kerala) and T. (Tegulata) nicobara sp. nov. (from the Great Nicobar Island). The former is diagnosed with its close congeners in the subgenus Cossa Walker: T. (C.) ruma (Swinhoe, [1890] 1889), T. (C.) munnara Volynkin, 2023, T. (C.) basigera (Walker, [1865]) and T. (C.) inducta (Walker, [1865]), whereas the latter is diagnosed with T. (Tegulata) chiloides chiloides (Walker 1862). T. (Poikilothosia) sayinyingpo Huang, Volynkin & Černý, 2025, from Arunachal Pradesh, which is a new record to India.

Keywords: Kerala, Lithosiina, Nicobar Islands, NorthEast Himalaya, Tegulata, Western Ghats

Habitus of Teulisna spp.
1. Teulisna breveprocessa sp. nov., m# HT, Devikulam, Kerala, India (NZCZSI); 2. T. breveprocessa sp. nov., m# PT, Devikulam, Kerala, India (NZCZSI);
3. T. ruma (Swinhoe. 1889) m# Avalanchi, Nilgiri, Tamil Nadu, India (NZCZSI); 4. T. basigera (Walker [1865]) m# Pykara, Tamil Nadu, India (NZCZSI);
5. T. inducta (Walker 1864), m#, Naduvattam, Tamil Nadu, India (NZCZSI);
6. T. nicobara sp. nov., m# HT Great Nicobar Islands, Govind Nagar, India (NZCZSI); 7. T. nicobara sp. nov., m# PT Great Nicobar Islands, Govind Nagar, India (NZCZSI); 8. T. nicobara sp. nov., f# PT, Great Nicobar Islands, Govind Nagar, India (NZCZSI);
9. T. sayinyingpo Huang, Volynkin & Černý, 2025 m#, Sela, Arunachal Pradesh, India (NZCZSI); 10. T. sayinyingpo Huang, Volynkin & Černý, 2025 f#, Sela, Arunachal Pradesh, India (NZCZSI).

Teulisna (Cossa) breveprocessa sp. nov. (from the Western Ghats of Kerala) 
T. (Tegulata) nicobara sp. nov. (from the Great Nicobar Island).


Santosh Singh, Navneet Singh and Rahul Joshi. 2026. Two New Species and A New Species Record of Genus Teulisna Walker (Lepidoptera: Erebidae: Arctiinae) from India. Journal of Asia-Pacific Biodiversity. In Press. DOI: doi.org/10.1016/j.japb.2026.03.007 [20 April 2026]

Saturday, April 11, 2026

[Botany • 2026] Taeniophyllum wrightmyoensis (Orchidaceae) • A Review of the Genus Taeniophyllum in Andaman and Nicobar Islands (India) with the Description of A New Species


Taeniophyllum wrightmyoensis Alappatt,  

in Alappatt, 2026. 

Abstract  
A new species, Taeniophyllum wrightmyoensis (Orchidaceae) is described from the Andaman and Nicobar Islands, India. The new species resembles T. hasseltii and T. pusillum, but is distinct from both in having mostly terete free hanging roots (versus roots flat, appressed to the substratum), bracts lax (versus bracts close in T. pusillum), lip without any cushions (versus lip with convex cushions in T. hasseltii) and a conical spur (versus globose spur in T. pusillum). In addition, a review of other species of the genus Taeniophyllum reported from the Andaman and Nicobar Islands is provided with an identification key.

Keywords: Aeridinae; Orchidaceae; South Andaman; Taeniophyllum; new species

Taeniophyllum wrightmyoensis Alappatt sp. nov.
 a. Habit. b. Inflorescence. c. Flower bud with inflorescence rachis of previous year. d. Flower, lateral view. e. Flower close-up, front view. f. Bract. g. Dorsal sepal. h. Petals. i. Lateral sepals. j. Lip. k. Column with ovary. l. column with ovary and spur. m. Anther cap. n. Pollinia. o. Capsule. Photos: Alappatt.

Taeniophyllum wrightmyoensis Alappatt sp. nov.,
with Oberonia ensiformis (Sm.) Lindl. to the right.
Photo: Alappatt.

Taeniophyllum wrightmyoensis Alappatt, sp. nov.

This species is similar to Taeniophyllum hasseltii Rchb.f. and T. pusillum (Willd.) Seidenf. & Ormerod in having free sepals and petals, distichous bracts, fleshy lip and short anther-beak, but differs from them by its mostly free hanging terete roots and a few roots semi-terete when appressed to substratum (vs. roots flat, appressed to the substratum), bracts lax (vs. close in T. pusillum), comparatively smaller flowers (c. 3 mm across), not opening widely (vs. large flowers, 5–5.5 mm across, opening widely), lip blade without convex cushions (vs. with convex cushions in T. hasseltii), spur conical, being longer than broad (vs. globose, as long as broad in T. pusillum). 

Etymology. The specific epithet refers to the collections from Wrightmyo where the species was discovered.


 Alappatt, J.P. 2026. A Review of the Genus Taeniophyllum (Orchidaceae) in Andaman and Nicobar Islands (India) with the Description of A New Species, Taeniophyllum wrightmyoensis. Blumea - Biodiversity, Evolution and Biogeography of Plants. DOI: doi.org/10.3767/blumea.2026.70.02.06 

Friday, March 27, 2026

[Botany • 2026] Justicia balakrishnaniana (Acanthaceae) • A New Species from Andaman and Nicobar Islands, India


Justicia balakrishnaniana Parthiban, Rasingam & D. Sandhya Deepika,

in  Parthiban, Rasingam et Deepika, 2026. 

Abstract
Justicia balakrishnaniana Parthiban, Rasingam & D. Sandhya Deepika (Acanthaceae) is described and illustrated as a new species from the Andaman and Nicobar Islands, India. It is morphologically allied to J. ekakusuma due to similarities in the inflorescence and bracteoles, but differs in its decumbent growth habit, stems that root at the lower nodes, 5-lobed calyx, fruits lacking a constriction at the middle and wingless seeds. An identification key to the species of Justicia in the Andaman and Nicobar Islands is provided.

Justicia balakrishnaniana.
— A: Habit. — B: Flower. — C: Fruiting twig. — D: Flower bud. — E: Dorsal and ventral view of bract. — F: Dorsal and ventral view of bracteoles. — G: Corolla open. — H: Calyx. — I: Unequal calyx lobes. — J: Stamens. — K: Ovary with style. — L: Capsule. — M: Seeds.
D–M from the holotype; A–C photographed at Munda Pahad region of Chidiyatapu, 1 July 2025.

Justicia balakrishnaniana Parthiban, Rasingam & D. Sandhya Deepika, sp. nova 

Annual, erect or decumbent herbs, up to 30 cm tall; stems angular, 6-ridged, pubescent with strigose or hispid downwards-facing hairs on ridges, rooting at lower nodes; internodes 2–5 cm long, green. Leaves distinctly petiolate, petiole 1–2 mm long, sparsely hairy; lamina ovate to sub-orbicular, rarely elliptic, 0.6–1.5 × 0.4–1 cm, base cuneate to shortly attenuate, margins thickened with scabrous hairs, apex obtuse to rounded, sparsely strigose hairy on both sides; midrib prominent, on both sides with scabrous hairs; secondary veins 3–4 pairs, faint on adaxial surface, prominent on abaxial surface; cystoliths horizontally distributed along margins on adaxial surface. Inflorescence terminal spike, up to 3 cm long or solitary in ...

Etymology. The species is named in honour of Dr. N.P. Balakrishnan, former Regional Botanist of the Botanical Survey of India, who was instrumental in establishing the Andaman and Nicobar Regional Centre of the Botanical Survey of India at Port Blair.


Arikrishnan Parthiban, Ladan Rasingam, and Devara Sandhya Deepika. 2026. Justicia balakrishnaniana (Acanthaceae), a New Species from Andaman and Nicobar Islands, India. Annales Botanici Fennici. 63(1); 5-8. DOI: doi.org/10.5735/085.063.0102 (30 January 2026) 


Sunday, November 9, 2025

[Herpetology • 2025] Lycodon irwini • A ‘Crikey’ New Snake: An insular Lycodon Fitzinger, 1826 (Serpentes: Colubridae) from the Nicobar Archipelago, India


Lycodon irwini 
Naveen, Mirza, Choure & Chandramouli, 2025


Abstract
The Nicobar Archipelago, a biodiversity hotspot in the Bay of Bengal, harbours several poorly studied and endemic reptile lineages. Several species of snakes from these islands are known to science with just one or a handful of specimens. One such taxon, historically identified as Lycodon subcinctus Boie, 1827, has remained taxonomically unresolved, known only from a single sighting on Great Nicobar Island to date. Recent taxonomic revisions of the L. subcinctus complex enabled us to reassess the status of the population from the Nicobar Islands. Studies suggested that the species is distinct, and a re-examination of museum material and newly collected specimens, combined with molecular analyses, confirms the distinctiveness of the species and is here described as a new species, Lycodon irwini sp. nov. Given its rarity and restriction to Great Nicobar Island, and taking into account potential threats we recommend that the new species be classified as ‘Endangered’ under the IUCN Red List criteria.

Key Words: Colubridae, conservation, island, phylogeny, Sundaland, systematics, taxonomy, wolf snakes

Lycodon irwini sp. nov., adult female holotype (Voucher no. DOSMB 05114), head views.
a. Dorsal aspect; b. Ventral aspect; c. Right lateral aspect; d. Left lateral aspect.

Lycodon irwini sp. nov., dorsolateral view of an adult female in life.

 Lycodon irwini sp. nov.
 
Diagnosis. Lycodon characterized by the following characters: body size fairly large, maximum known total length up to 1197 mm, slender; preocular maybe present or absent (present here only in the holotype), loreal touching orbit; dorsal scale rows 17-17-15, anterior part of the body with smooth scales and posterior parts with the outermost rows smooth and the remaining rows feebly keeled; ventral scales 223–238; subcaudals 78–94, paired; TaL/TL 0.20–0.23; supralabials 8, with the 3rd–5th touching orbit; postoculars 2/2; cloacal plate divided. Dorsum overall in a shade of glossy black, lacking bands and ventrally greyish black with cream ventrolateral ridge.

Etymology. The specific epithet is a patronym honouring the late Stephen Robert Irwin (22 February 1962–1964 September 2006), the renowned Australian zookeeper, conservationist, television personality, and wildlife educator. His passion and dedication to wildlife education and conservation have inspired naturalists and conservationists worldwide, including the authors of this paper.


R. S. Naveen, Zeeshan A. Mirza, Girish Choure and S. R. Chandramouli. 2025. A ‘Crikey’ New Snake: An insular Lycodon Fitzinger, 1826 (Squamata, Colubridae) from the Nicobar Archipelago, India. Evolutionary Systematics. 9(2): 221-228. DOI: doi.org/10.3897/evolsyst.9.170645 

Monday, September 22, 2025

[Herpetology • 2025] Taxonomic Status of Coryphophylax maximiliani Fitzinger in: Steindachner, 1867 with Notes on Coryphophylax subcristatus (Blyth, “1860” 1861)

 

 Coryphophylax maximiliani Fitzinger in Steindachner, 1867

in Mirza​, Pal, Thackeray, Patel et Bauer. 2025.

Abstract
The insular agamid genus Coryphophylax Fitzinger in Steindachner, 1867, is endemic to the Andaman and Nicobar Islands in the Bay of Bengal, India. These diurnal lizards are currently represented by two putative species, Coryphophylax subcristatus (Blyth, “1860” 1861) and Coryphophylax brevicauda Harikrishnan, Vasudevan, Chandramouli, Choudhury, Dutta & Das, 2012. The species C. subcristatus is said to be distributed through the Andaman and Nicobar Islands, even across the Ten Degree Channel, which is a recognised biogeographic barrier. A reassessment of the taxonomy of C. subcristatus shows the population south of the Ten Degree Channel, for which the nomen Coryphophylax maximiliani Fitzinger in Steindachner, 1867 is available, to be distinct. The results are based on morphological data from museum material, including type specimens and mitochondrial 16S rRNA sequences. The members of the genus Coryphophylax are abundant and widespread across the islands and may serve as an illuminating example for studying the patterns of colonization and diversification across the Andaman and Nicobar Islands.


Coryphophylax maximiliani Fitzinger in Steindachner, 1867

Coryphophylax maximiliani from Nicobar Islands showing colouration in life.
 Photos by S. Harikrishnan.


Zeeshan A. Mirza​, Saunak Pal, Tejas Thackeray, Harshil Patel and Aaron M. Bauer. 2025. Taxonomic Status of Coryphophylax maximiliani Fitzinger in: Steindachner, 1867 with Notes on Coryphophylax subcristatus (Blyth, “1860” 1861) PeerJ. 13:e19841. DOI: doi.org/10.7717/peerj.19841 [September 19, 2025]

Saturday, September 20, 2025

[Ichthyology • 2025] Upeneus alama & U. brevianalis • Two New Goatfish Species of the Upeneus sulphureus Species Group (Syngnathiformes: Mullidae), with a Redescription of U. sulphureus Cuvier, 1829 and a Review of Barbel Length in the Genus


(A, B) Upeneus alama: Philippines, Manila Bay, Cavite;
(C) U. brevianalis, Thailand, Andaman Sea, Phuket; 
(D) U. doriae: Persian/Arabian Gulf, Bahrain;
(F, G) U. nigromarginatus: (F) Philippines, Negros Oriental, Dumaguete Citz; (G) Philippines, Panay Island, Tigbauan market near Iloilo City. 

Upeneus sulphureus Cuvier, 1829. (A, B) Thailand, Gulf of Thailand, Prachuab Khiri Khan Province; (C) Philippines, Metro Manila; (D) Vietnam, Ha Long Bay.  

in Uiblein, Motomura, Møller, Sabaj, Boonphienphol, Hoang et Parkinson, 2025. 

 Abstract 
For the goatfish genus Upeneus, the new sulphureus-species group is established, which includes five species, U. doriae, U. nigromarginatus, U. sulphureus, and the two new speciesU. alama and U. brevianalis. This taxonomic group differs from the other seven species groups and four ungrouped species of this genus in the following combination of characters: 8 dorsal-fin spines, 14–17 pectoral-fin rays, 25–33 total gill rakers, 32–37 lateral-line scales, and lack of bars on caudal fin. Upeneus sulphureus is redescribed based on examination of a large set of morphometric, meristic, and color characters in 211 specimens, which revealed a bimodal distribution in barbel length prompting separation into short- and long-barbel morphs. This bimodality was neither sex-, size-, nor population-dependent, but found in co-occurring individuals of U. sulphureus in many areas of its distributional range from East Africa to Japan. The two new species differ from all other congeners primarily in U. alama, new species, having longer barbels (28–30% SL) and U. brevianalis, new species, having a shorter and shallower anal fin (8.1 and 12% SL, respectively) as well as a broad, dark-brown vertical band along the anterior third of the first dorsal fin. For U. nigromarginatus, new records from Papua New Guinea, Indonesia (West Papua), and three areas of the Philippines north of Mindanao are reported. For U. doriae, U. sulphureus, and Mulloides pinnivittatus, the latter a junior synonym of U. sulphureus, lectotypes are designated. An updated account for the genus Upeneus is provided. The barbel-length data of all 53 species of Upeneus are reviewed, and the finding of a wide range combined with a distinct dimorphism of this character in U. sulphureus is discussed.

Upeneus sulphureus.
 (A, B) KAUM-I.33094, SBM, 119 mm SL, Thailand, Gulf of Thailand, Prachuab Khiri Khan Province (H. Motomura); (C) USNM 403094, SBM, 105 mm SL, Philippines, Metro Manila (copyright J. T. Williams); (D) KAUM-I.67460, SBM, 90 mm SL, Vietnam, Ha Long Bay (H. Motomura);
(E, F): SAIAB 82237, LBM, 106 mm SL, Mozambique (E: copyright O. Alvheim, F: copyright P. C. Heemstra);
(G, H) KAUM-I.57209, LBM, 91 mm SL, Philippines, Panay Island, Iloilo City (H. Motomura); (I, J) KAUM-I.123161, LBM, 99 mm SL, Japan, Kagoshima, NE of Matsushima (H. Motomura). 

(A, B) Upeneus alama: (A) USNM 466258, HT, 117 mm SL, Philippines, Manila Bay, Cavite (copyright D. Pitassy); (B) USNM 466258, PT, 125 mm SL, same locality (copyright D. Pitassy);
(C) U. brevianalis, ZMUC P49375, HT, 137 mm SL, Thailand, Andaman Sea, Phuket (F. Uiblein); 
(D, E) U. doriae: (D): USNM FIN 31104 (unvouchered photograph), 106 mm SL, Persian/Arabian Gulf, Bahrain (copyright J. E. Randall); (E) ZMB 7056, LT, 104 mm SL, Iran, Persian/Arabian Gulf, Bandar Abbas (copyright E. Aßel);
(F, G, H) U. nigromarginatus: (F) USNM 403319, 159 mm SL, Philippines, Negros Oriental, Dumaguete Citz (copyright J. T. Williams); (G) VNMN-I 1986 (unvouchered image), ca. 70 mm SL, Philippines, Panay Island, Tigbauan market near Iloilo City (F. Uiblein); (H) AMS I.18495-001, 88 mm SL, Papua New Guinea, Madang Province, Broken Water Bay (K. Parkinson).  

Upeneus alama Uiblein and Motomura, new species
Cavite Goatfish
  
Diagnosis.—Dorsal fins VIII + 9; pectoral fins 16; gill rakers 8–9 upper + 20–22 lower = 28–31 total; lateral-line scales 33; body moderately deep; measurements as % SL: body depth at anal-fin origin 25–28; maximum head depth 26; head depth through eye 22; suborbital depth 14; head length 34; snout length 13; postorbital length 14; upper-jaw length 15; barbel length 28–30; barbel width 1.6–1.7; caudal-peduncle length 21–22; second dorsal-fin base length 14; caudal-fin length 28–32; length of anal-fin base 9.8–9.9; anal-fin height 15–17; pelvic-fin length 20; pectoral-fin length 28; pectoral-fin width 5.5–5.9; first dorsal-fin height 24–25; first two or three long dorsal-fin spines protruding; second dorsal-fin height 17; caudal fin without bars; first dorsal fin with black tip, retained in preservative; preserved fish with silvery-whitish head, pale brown body ventrally and dark brown dorsally; fins except for first dorsal-fin tip pale brown, partly hyaline; barbels very long, pale.

Etymology.—The new species name “alama” is used as a noun in apposition and honors the late Mr. Ulysses Banga Alama (1959–2023), who was employed at the College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo, Philippines, and manager of the UPVM fish collection, to commemorate his contributions to marine ichthyology.


Upeneus brevianalis Uiblein and Boonphienphol, new species
 Phuket Goatfish
 
Diagnosis.—Dorsal fins VIII + 9; pectoral fins 16; gill rakers 8 upper + 20 lower = 28 total; lateral-line scales 31–32; body moderately deep; measurements as % SL: body depth at anal-fin origin 23; maximum head depth 27; head depth through eye 21; suborbital depth 14; head length 33; snout length 13; postorbital length 14; upper-jaw length 14; barbel length 20; barbel width 1.5; caudal-peduncle length 19; second dorsal-fin base length 15; caudal-fin length 31; length of anal-fin base 8.1; anal-fin height 12; pelvic-fin length 20; pectoral-fin length 26; pectoral-fin width 6.0; first dorsal-fin height 23, first five long dorsal-fin spines slightly protruding; second dorsal-fin height 17; caudal fin without bars; anterior third of first dorsal fin forming a broad, dark-brown vertically oriented band, becoming slightly wider dorsally; head and body pale brown to brown, belly lighter; paired and anal fins pale hyaline; barbels pale to pale brown.

Etymology.—The new species name “brevianalis” refers to the short anal fin, an important diagnostic character of this species.


Franz Uiblein, Hiroyuki Motomura, Peter R. Møller, Mark Sabaj, Supasit Boonphienphol, Tuan A. Hoang and Kerryn Parkinson. 2025. Two New Goatfish Species of the Upeneus sulphureus Species Group (Mullidae), with a Redescription of U. sulphureus Cuvier, 1829 and a Review of Barbel Length in the Genus. Ichthyology & Herpetology. 113(3); 453-486. DOI: doi.org/10.1643/i2024094 (22 August 2025)  
 

Wednesday, May 28, 2025

[Phycology • 2025] Rhodogorgon truncata (Rhodophyta: Rhodogorgonales) • A New Red Alga from the west coast of Thailand


Rhodogorgon truncata Muangmai & Draisma,

in Muangmai, Draisma, Gabriel, Schils, Kato et Yoon, 2025. 

ABSTRACT
The recognition of new species is fundamental to understanding biodiversity and biogeography. Through an integrative taxonomic approach, combining morphological and multilocus molecular data, a new red algal species, Rhodogorgon truncata sp. nov. is described from the west coast of Thailand. The new species differs from the two previously described species in the genus, i.e. R. ramosissima and R. flagellifera, by unique morphological features including compressed and stocky thalli with determinate short branchlets along the upper portion, giving it a truncated and verrucose appearance. Our morphological observations revealed the smaller size, compressed shape, and truncated apices of R. truncata in contrast to the cylindrical, irregularly branched thalli of R. ramosissima and R. flagellifera. Phylogenetic analyses suggest that R. truncata is more closely related to undescribed Rhodogorgon specimens from the Indo-Pacific than to the Caribbean R. ramosissima. The discovery of this new species expands the known diversity within the genus Rhodogorgon and suggests greater, as yet undiscovered, species diversity among poorly studied red algae in the Indo-Pacific Ocean.

KEYWORDS: Andaman Sea, New species, Reef algae, Seaweed, Taxonomy


Rhodogorgon truncata sp. nov. Muangmai & Draisma

 
Narongrit Muangmai, Stefano G. A. Draisma, Daniela Gabriel, Tom Schils,Aki Kato and Hwan Su Yoon. 2025. Rhodogorgon truncata sp. nov. (Rhodogorgonales, Rhodophyta), A New red alga from the west coast of Thailand. Phycologia. DOI: doi.org/10.1080/00318884.2025.2491144  [28 Apr 2025]

ค้นพบสาหร่ายหินปูนสีแดงชนิดใหม่ของโลกจากชายฝั่งทะเลอันดามัน 
จังหวัดภูเก็ตและพังงา ประเทศไทย 
.
รองศาสตราจารย์ ดร.ณรงค์ฤทธิ์ เมืองใหม่ อาจารย์ประจำภาควิชาชีววิทยาประมง ร่วมกับ Dr. Stefano Draisma สถานีวิจัยความเป็นเลิศความหลากหลายทางชีวภาพแห่งคาบสมุทรไทย มหาวิทยาลัยสงขลานครินทร์ Dr. Daniela Gabriel, University of the Azores สาธารณรัฐโปรตุเกส Prof. Tom Schils, University of Guam สหรัฐอเมริกา Prof. Aki Kato, Hiroshima University, ประเทศญี่ปุ่น และ Prof. Hwan Su Yoon, Sungkyunkwan University, สาธารณรัฐเกาหลี
.
ค้นพบและตั้งชื่อสาหร่ายหินปูนสีแดงชนิดใหม่ของโลก Rhodogorgon truncata sp. nov. Muangmai & Draisma จากชายฝั่งทะเลอันดามัน จังหวัดภูเก็ตและจังหวัดพังงา 
.
สาหร่ายสีแดงหินปูนชนิดใหม่นี้มีลักษณะคล้ายกัลปังหา (gorgonians) และพบแพร่กระจายบริเวณแนวปะการังทางชายฝั่งทะเลอันดามัน พบได้ที่ระดับความลึกตั้งแต่ 1 เมตร จนถึง 6 เมตร งานวิจัยนี้เป็นส่วนหนึ่งของการสำรวจความหลากหลายทางชีวภาพของสาหร่ายทะเลบริเวณชายฝั่งทะเลของประเทศไทย 

 

Tuesday, December 10, 2024

[Herpetology • 2024] Hylarana chozhai • A New Species of Hylarana Tschudi, 1838 (Anura: Ranidae) from the Nicobar Islands, India


Hylarana chozhai 
Naveen, Chandramouli, Praveenraj & Babu, 2024


Abstract
The island of Great Nicobar is known to support high degree of herpetofaunal diversity and endemism due to insular isolation. Among them, the population of Hylarana chalconota on this island was assessed to determine its taxonomic status and affinities using morphological, acoustic, and molecular data. Molecular phylogeny based on 16S rRNA showed a considerable amount of genetic divergence with 9.19–16.45% from congeners of the Hylarana chalconota complex. We describe this population as a new species, noting its unique morphological characteristics and phylogenetic position.

Keywords: 16S rRNA, Andaman & Nicobar archipelago, copper-cheeked frog, Sundaland biodiversity hotspot, systematics

 Hylarana chozhai sp. nov. in life
[Top] male holotype (DOSMB05117); [Middle] female paratype (DOSMB05119); [Bottom] male paratype (DOSMB 5011b)
Not to scale.

Hylarana chozhai sp. nov.
Rana chalconota—Das (1996) (partim “Nicobars”)
Chalcorana cf. chalconota—Harikrishnan and Vasudevan (2018)
Chalcorana sp.—Chandramouli (2018)

Diagnosis. A relatively small-sized frog of the genus Hylarana from the H. chalconota group, characterized by: snout-vent length of females up to 46.2 mm, males, mean 33.59 mm ± 1.88 (n = 4); males with a single, median sub-gular vocal sac; dorsal skin shagreened; dorsolateral folds weakly developed; foot nearly completely webbed with webbing formula I0-0.5II0-0.5III0.5-1IV1-0V and digit tips expanded to rhomboidal discs with circum-marginal grooves.

Etymology. The specific epithet 'chozhai' is intended to honor the Thamizh King Rajendra Chozha (ராேஜந்திர ேசாழா (/ˈtʃəʊlə/)) and the Chozha dynasty who occupied the Andaman and Nicobar Islands as part of the Chozha kingdom.


Ravi Shanthy Naveen, Sumaithangi Rajagopalan Chandramouli, Jayasimhan Praveenraj and Santhankrishnan Babu. 2024. A New Species of Hylarana Tschudi, 1838 (Amphibia: Anura: Ranidae) from the Nicobar Islands, India.  Journal of Asia-Pacific Biodiversity. In Press. DOI:  doi.org/10.1016/j.japb.2024.10.011

Sunday, August 4, 2024

[Botany • 2023] Morindopsis ashihoi (Rubiaceae: Octotropideae) • A New Species from the Andaman and Nicobar Islands, India


Morindopsis ashihoi M.C.Naik, L.J.Singh & Arriola, 

in Naik, Singh, Dawson et Arriola. 2023. 

Summary
During the most recent floristic surveys in the Andaman and Nicobar Islands, an interesting species of Rubiaceae was collected with features allied to representatives of the tribe Octotropideae. Initial identification showed that our material is characterised by having an inflorescence that is subtended by large boat-shaped floral bracts, a character that is unique to the genus Morindopsis. Interestingly, the genus is currently represented only by M. capillaris and after meticulous observation of our material and careful comparison with available herbarium sheets and the protologue, we found that our taxon showed a great disparity in various vegetative and reproductive features with M. capillaris. Thus we describe and illustrate a new species here — Morindopsis ashihoi, the second known species for the genus and a new record for the Andaman and Nicobar Islands.

Key Words: Asia, endemic, Ixoroideae, taxonomy


Morindopsis ashihoi (Naik 33689). A habit; B stem; C small twig; D stipule; E inflorescences; F & G flower; H fruit.


Morindopsis ashihoi M.C.Naik, L.J.Singh & Arriola sp. nov.


Mudavath Chennakesavulu Naik, Lal Ji Singh, Sally Dawson and Axel Arriola. 2023. Morindopsis ashihoi (Octotropideae; Rubiaceae), A New Species from the Andaman and Nicobar Islands, India.  Kew Bulletin. 78; 375–380. DOI: doi.org/10.1007/s12225-023-10097-w

Wednesday, July 31, 2024

[Herpetology • 2024] Tree Holes to Trash: Unique Upside-down Terrestrial Spawning, Agonistic Interactions, Complex Mating Calls, and Unnatural Breeding Alterations in Minervarya charlesdarwini (Anura: Dicroglossidae)


Charles Darwin's Frog (Minervarya charlesdarwini) from the Andaman Islands of India

in Biju, Garg, Gokulakrishnan, Sivaperuman, Upadhyaya, Bee et Hanken, 2024. 

Abstract
Anuran amphibians exhibit the greatest diversity of reproductive modes among tetrapod vertebrates. The Andamanese Charles Darwin's frog, Minervarya charlesdarwini, is the only species of the family Dicroglossidae that is known to naturally deposit eggs in water-filled cavities of tree holes or buttresses, where they then undergo exotrophic development. We describe the reproductive behavior in this species that involves a unique combination of traits: (1) Males produce complex advertisement calls comprising at least three different call types, in addition to a type of aggressive call. (2) Unpaired males exhibit agonistic interactions with each other and with mated pairs. (3) Mate selection, amplexus, and oviposition take place inside water-filled cavities. (4) During axillary amplexus, mating pairs synchronously switch between head-up and head-down positions above and below the water surface using both forward and backward movements. (5) At the time of egg laying, amplectant pairs are in an upside-down position on the cavity walls with their bodies completely outside the water. (6) Eggs are deposited over multiple bouts on the inner walls of the cavities and terrestrially above the water surface. Upside-down spawning in M. charlesdarwini is a unique trait among phytotelm-breeding terrestrial frogs. The combination of terrestrial oviposition sites in water-filled phytotelmata and the upside-down egg-laying posture is a novel report for the family Dicroglossidae and perhaps all anurans. This specialized behavior is also likely derived for a species that is embedded in a group of largely aquatic-breeding minervaryan frogs. Although M. charlesdarwini appears to be an obligate phytotelm breeder, individuals were often observed breeding inside cylindrical, water-filled plastic sapling bags in plant nurseries adjacent to fragmented forest patches, or in rain-filled discarded plastic, glass, or metal containers left as trash at the forest edge. Use of such unnatural breeding sites is likely a forced behavioral shift in response to rapidly changing forest landscapes associated with recent habitat loss and fragmentation. Our findings call for conservation attention to this habitat specialist, which, although locally abundant, is an endemic and threatened species of the Andaman Islands.

KEYWORDS: Amphibia, amplexus, Andaman and Nicobar Islands, bioacoustics, conservation, frog behavior, oviposition, phytotelm breeding, reproductive mode


A breeding pair of Charles Darwin's Frog (Minervarya charlesdarwini) from the Andaman Islands of India.
photo: S.D. Biju

A male Charles Darwin's frog calling from an unnatural breeding site: a rain-filled metal food tin littered on the forest floor.
photo: G. Gokulakrishnan


 
S. D. Biju, Sonali Garg, G. Gokulakrishnan, Chandrakasan Sivaperuman, RadhaKrishna K. Upadhyaya, Mark A. Bee, and James Hanken. 2024. Tree Holes to Trash: Unique Upside-down Terrestrial Spawning, Agonistic Interactions, Complex Mating Calls, and Unnatural Breeding Alterations in Minervarya charlesdarwini (Anura, Dicroglossidae). Breviora. 577(1), 1-33. DOI: doi.org/10.3099/0006-9698-577.1.1


Tuesday, May 28, 2024

[Ichthyology • 2022] Sicyopterus garra Hora, 1925, A Valid Species of sicydiine goby (Gobiiformes: Oxudercidae: Sicydiinae) from the Andaman Islands, India


Sicyopterus garra Hora, 1925

in Praveenraj, Kiruba-Sankar, Saravanan, Thackeray, Singh, Knight et Keith, 2022. 
facebook.com: Praveenraj Jayasimhan

Abstract
Sicyopterus garra Hora, 1925 from the insular streams of South Andaman Islands was synonymized with Sicyopterus microcephalus described from Java, South East Asia and has retained this taxonomic status since then. Recent collections of Sicyopterus from the type locality of S. garra and the examination of syntypes of this species revealed significant morphological and genetic differences from S. microcephalus and the other Sicyopterus species with papillae on upper lip. S. garra is thus a valid species and not a synonym of S. microcephalus. S. garra differs from S. microcephalus in having fewer lateral scales 53–59 vs. 57–68, fewer zigzag series (12–14 vs. 13–16), a longer caudal peduncle length (16–21 vs. 13–17), and by having a high percentage of divergence in COI gene (5.5%–5.8%).

Keywords: COI gene, freshwater goby, insular, sicydiine, Sicyopterus microcephalus, South East Asia


Sicyopterus garra in life.
 (a) Male, ZSI/FF-9385, 37.5 mm SL, and (b) female, ZSI/FF-9385, 39.9 mm SL, from Brichgunj, South Andaman Islands.
(c) Male, ZSI/FF-9386, 54.3 mm SL, and (d) female, ZSI/FF-9386, 50.0 mm SL, from Mannarghat, base of Mt. Harriet, National Park, South Andaman

Sicyopterus garra Hora, 1925 


Jayasimhan Praveenraj, Rajendran Kiruba-Sankar, Kandasamy Saravanan, Tejas Thackeray, Pratima Singh, John Daniel Marcus Knight and Philippe Keith. 2022. Sicyopterus garra Hora, 1925, A Valid Species of sicydiine goby from the Andaman Islands, India. Journal of Fish Biology. 101(5); 1189-1198. DOI: 10.1111/jfb.15189


Saturday, March 9, 2024

[Ichthyology • 2024] Chimaera supapae (Holocephali: Chimaeriformes: Chimaeridae) • A New Species of Chimaera from the Andaman Sea of Thailand


Chimaera supapae
Ebert, Krajangdara, Fahmi & Kemper, 2024

  Raffles Bulletin of Zoology. (72)

Abstract
A new species of shortnose chimaera is described from a single specimen collected at 772–775 m depth in the Andaman Sea (07.54° N; 96.99° E) off Thailand. The species is distinguished from its congeners by the combination of the following characteristics: massive head with short snout; eyes relatively large, horizontally oval, eye length 32.2% head length; thin body with a relatively long trunk 40% body length (BDL), deciduous skin; uniformly dark brown; preopercular and oral lateral line canals sharing a common branch; posterior margin of pectoral fins slightly convex; long dorsal spine 27% BDL, longer than the first dorsal fin. The new species is morphologically close to Chimaera macrospina from Australia but differs in the length of the ventral caudal lobe, snout-vent length, and pectoral fin anterior margin length. It can be distinguished from C. macrospina and other Chimaera species based on the DNA sequence divergence of the mitochondrial ND2 gene. 

Key words. Chondrichthyes, eastern Indian Ocean, SE Asia, morphology, genetics, taxonomy

Lateral view of Chimaera supapae, new species, holotype (PMBC 30399),
immature male, 508 mm TL, 276 mm BDL (Before preservation).

Chimaera supapae, new species 
Andaman shortnose chimaera

Diagnosis. Chimaera supapae can be distinguished from all other chimaeroids by the following combination of characters: massive head with a short snout; eyes relatively large, horizontally oval, eye length 32.2% head length; thin and relatively long trunk 40% BDL, deciduous skin; uniformly dark brown, without any spots or stripes; preopercular and oral lateral line canals sharing a common branch; posterior margin of pectoral fins slightly convex; long dorsal spine 27 % BDL, longer than first dorsal fin.

Etymology. The epithet supapae is named to honor the late Professor Supap Monkolprasit (1934–2013), for her extensive work on the cartilaginous fishes of Thailand. She was the Dean of Faculty of Fisheries, Kasetsart University, Thailand during the years 1991–1995, but devoted her entire life to the study of cartilaginous fishes in Thailand.

Distribution. Known only from the type location ___ in the Andaman Sea off Thailand, eastern Indian Ocean at 772–775 m depth (Fig. 1).


David A. EBERT, Tassapon KRAJANGDARA, FAHMI and Jenny M. KEMPER. 2024. Chimaera supapae (Holocephali: Chimaeriformes: Chimaeridae), A New Species of Chimaera from the Andaman Sea of Thailand.  Raffles Bulletin of Zoology. (72); 84–90.


Friday, November 17, 2023

[Ichthyology • 2023] Thrissina aurora • A New Species of Thrissina from the Andaman Sea and Re-assessment of the Taxonomic Status of Thrissina cuvierii & T. malabarica (Clupeiformes: Engraulidae: Coiliinae)


Thrissina aurora
 Hata, Lavoué, Chungthanawong & Motomura, 2023

Sunrise Thryssa  ||  DOI: 10.1643/i2023001

Abstract
Examination of the original description of Thrissina malabarica (Bloch, 1795), a name previously applied to an Indian Ocean species with a distinctly deep body, revealed that the former nominal species was actually a senior synonym of Thrissina hamiltonii (Gray, 1835), a slender-bodied Indo-West Pacific species. The applicable name for the species previously treated as T. malabarica is Thrissina cuvierii (Swainson, 1839). To stabilize the taxonomic status of these three nominal species, a neotype for T. cuvierii is designated. In addition, Thrissina aurora, new species, is described from a specimen collected from the Andaman Sea near Phuket, Thailand. Although both the new species and T. cuvierii share a deep body, the former is distinguished by lower counts of gill rakers and anal-fin rays than the latter. The mitochondrial cytochrome oxidase I (COI) haplotype network of 11 specimens of T. cuvierii and three specimens (including the holotype) of T. aurora, new species, revealed 22 nucleotide differences between the two species, corresponding to 3.4% mean uncorrected genetic distance.

Holotype of Thrissina aurora, new species, THNHM-F 021939, 146.7 mm SL, Phuket, Thailand.
 (A) Fresh condition; (B) preserved condition.

Thrissina aurora, new species 
Common Name: Sunrise Thryssa

Etymology.—The specific name “aurora,” meaning “dawn” in Latin, is derived from the bright yellow and orangish colors of the new species, reminiscent of sunrise.


Harutaka Hata, Sébastien Lavoué, Sirikanya Chungthanawong and Hiroyuki Motomura. 2023. A New Species of Thrissina from the Andaman Sea and Re-assessment of the Taxonomic Status of Thrissina cuvierii (Swainson, 1839) and Thrissina malabarica (Bloch, 1795) (Teleostei: Clupeiformes: Engraulidae: Coiliinae). Ichthyology & Herpetology., 111(4); 549-562. DOI: 10.1643/i2023001