[Fungi • 2025] Sirindhornea siamensis (Basidiomycota: Agaricomycetes) • A New Sequestrate Boletoid Genus of Boletaceae from Thailand

 

Sirindhornea siamensis  

in Lueangjaroenkit, Doungsin, Jangsantear, Boonwanno, Sintawarak, Sahathippayakul, Supapongsri, Sakolrak, Himaman et Sutthinon, 2025. 

เห็ดก้อนอำพันเจ้าฟ้า | DOI: doi.org/10.58837/tnh.25.8.267496

Abstract

This study investigates sequestrate boletes from southern Thailand and presents a morphologically distinctive specimen with a strong cantaloupe-like odor. Detailed morphological and molecular phylogenetic analyses, utilizing the internal transcribed spacer (ITS), large subunit ribosomal RNA (LSU) and RNA polymerase II second largest subunit (RPB2) genes were performed to determine its taxonomic position. Nonetheless, the new sequestrate bolete exhibited a distinctive morphological features, including a scaly peridium, a characteristic cantaloupe-like odor at maturity. Together with molecular evidence, these characteristics clearly distinguish it from other sequestrate boletoid (Chamonixia, Durianella, Octaviania, Rossbeevera, and Turmalinea). These findings support the recognition of a novel genus within the subfamily Leccinoideae. Therefore, we propose a new genus and new species, Sirindhornea siamensis, for this sequestrate bolete species.

Keywords: fungal taxonomy, new genus, Leccinoideae, sequestrate boletes

  

Sirindhornea gen. nov.

เห็ดก้อนอำพันเจ้าฟ้า

Sirindhornea siamensis sp. nov. 

 Etymology.–The species epithet siamensis is named from the former name of Thailand, refers to the geographical origin of this new species.

Classification.–Leccinoideae,  Boletaceae,  Boletales, Agaricomycetes, Agaricomycotina, Basidiomycota

Piyangkun Lueangjaroenkit, Nootcharee Doungsin, Panrada Jangsantear; Tanyaporn Boonwanno; Phanin Sintawarak, Ananya Sahathippayakul, Vassana Supapongsri, Baramee Sakolrak, Winanda Himaman, Pornsawan Sutthinon. 2025. Sirindhornea siamensis, A New Sequestrate Boletoid Genus of Boletaceae from Thailand.  Tropical Natural History. Suppl. 8;  481-492. DOI: doi.org/10.58837/tnh.25.8.267496 

[Crustacea • 2025] Caribodillo martinicensis • A New Genus and Species of terrestrial isopod (Oniscidea: Armadillidae) endemic to Martinique

Caribodillo martinicensis  

Kästle, Binder, Jones & Coulis, 2025

  

 sciencepress.mnhn.fr/en/periodiques/zoosystema/47/29

 Researchgate.net/publication/397676418

The terrestrial isopods of the family Armadillidae Brandt, 1833 are poorly known in tropical regions, many new species remain to be described and the classification of many already described species requires revision. The aim of this work is to improve our knowledge of the terrestrial isopods of this family in Martinique, an island in the Lesser Antilles archipelago. The species Caribodillo martinicensis n. gen., n. sp. is described, and a genetic barcode (CO1) is provided. Furthermore, the relationship between Caribodillo n. gen., and Venezillo Verhoeff, 1928 is discussed. The species constitutes the second Armadillidae endemic to the Lesser Antilles, the first one being Cubaris depressa (Dollfuss, 1896) from Saint-Vincent. In addition to increasing our knowledge on the invertebrate biodiversity of the lesser Antilles, the description of this new genus will facilitate the taxonomy of Armadillidae species in the region.

Keywords: Caribbean, Lesser Antilles, Neotropics, Venezillo, woodlice, fluorescence, barcoding, new species, new genus

Caribodillo martinicensis n. gen., n. sp. 

 

 

Benedikt KÄSTLE, Stephanie BINDER, Nathan T. JONES and Mathieu COULIS. 2025. Description of A New Genus and Species of terrestrial isopod (Oniscidea, Armadillidae) endemic to Martinique. Zoosystema. 47(29); 721-729. DOI: 10.5252/zoosystema2025v47a29 [14 November 2025]

  sciencepress.mnhn.fr/en/periodiques/zoosystema/47/29

 Researchgate.net/publication/397676418_a_new_genus_and_species_of_terrestrial_isopod_endemic_to_Martinique

[Entomology • 2025] Tetraponera sirindhornae • A New Species of the Ant Genus Tetraponera Smith, 1852 (Hymenoptera: Formicidae: Pseudomyrmecinae) from Thailand

 Tetraponera sirindhornae Yodprasit, Tasen & Jaitrong,

in Yodprasit, Tasen, Jeenthong, Buddhakala et Jaitrong, 2025. 

มดตะนอยเทพรัตน์  ||  DOI: doi.org/10.58837/tnh.25.8.266419 

Abstract

Tetraponera Smith, 1852, a large ant genus comprising 87 extant and seven fossil species, is primarily distributed in the Afrotropical, Oriental, and Australasian regions. A new species, Tetraponera sirindhornae Yodprasit, Tasen & Jaitrong, sp. nov., is described from southern Thailand based on worker, dealate queen, and male castes. The new species exhibits worker dimorphism and is morphologically similar to T. binghami (Forel, 1902), T. connectens Ward, 2001, and T. notabilis Ward, 2001 in possessing an elongated head, but differs by the presence of a distinct mandibular gap between masticatory margins when the mandibles are closed (in the case of major worker and queen). The new species was found nesting in a dead rubber tree branch on a tree within a rubber plantation near a stream.

Keywords: dimorphism, new species, taxonomy, key

 Tetraponera sirindhornae Yodprasit, Tasen & Jaitrong, sp. nov.

มดตะนอยเทพรัตน์ 

Kuntima Yodprasit, Wattanachai Tasen, Tadsanai Jeenthong, Nopparat Buddhakala and Weeyawat Jaitrong. 2025. A New Species of the Ant Genus Tetraponera Smith, 1852 (Hymenoptera: Formicidae: Pseudomyrmecinae) from Thailand. Tropical Natural History. Suppl. 8; 287-296. DOI: doi.org/10.58837/tnh.25.8.266419 [2025-10-20] 

 

[Entomology • 2025] Vombisidris sirindhornae • The Ant Genus Vombisidris Bolton, 1991 (Hymenoptera: Formicidae) in Thailand, with a Description of a New Species

Vombisidris sirindhornae Jeenthong, Samung & Jaitrong,

in Jeenthong, Samung, Phosrithong et Jaitrong, 2025. 

มดบากเทพรัตน์  ||  DOI: doi.org/10.58837/tnh.25.8.266521

Abstract

Vombisidris Bolton, 1991, a small ant genus comprising 20 extant species (including the new species), is distributed in India, China, various countries in Southeast Asia, New Guinea, and Queensland of Australia. Two species of the genus, V. satunensis Jeenthong, Jaitrong & Tasen, 2023 and V. sirindhornae Jeenthong, Samung & Jaitrong, sp. nov. are known in Thailand. Vombisidris satunensis inhabits lowland habitats (ca. 100–200 m a.s.l.), while V. sirindhornae is found in highland habitats (1,000 m a.s.l.). Both species were found nesting in dead twigs on trees at forest edges.

Keywords: distribution, identification key, new species, Southeast Asia, taxonomy

Vombisidris sirindhornae Jeenthong, Samung & Jaitrong, sp. nov.

มดบากเทพรัตน์

Tadsanai Jeenthong, Yudthana Samung, Netnapa Phosrithong and Weeyawat Jaitrong. 2025. The Ant Genus Vombisidris Bolton, 1991 (Hymenoptera: Formicidae) in Thailand, with a Description of a New Species.  Tropical Natural History. Suppl. 8;  426-438. DOI: doi.org/10.58837/tnh.25.8.266521

 facebook.com/YuththnaSamang/posts/25244606261843859

[Entomology • 2024] Capitamon gen. n., C. capitatum, C. mizoramense, ... • Identity of the Freshwater Crab Indochinamon beieri (Pretzmann, 1966), with the Description of A New Genus and Four New Species (Decapoda: Brachyura: Potamidae) from northeastern India

 

Capitamon n. gen.

 Pati, Mitra & Ng, 2024

  sciencepress.MNHN.fr/en/periodiques/zoosystema/46/23 

 x.com/Publi_MNHN

The precise identity of the potamid freshwater crab, Indochinamon beieri (Pretzmann, 1966), is ascertained, diagnosed and illustrated after examining the type material from Myanmar. The diagnosis/description of the species and subsequent accounts were based on a wrongly identified and illustrated specimen, probably from Nagaland in northeastern India, which caused substantial confusion among carcinologists, who referred to different taxa as I. beieri. Two such taxa from northeastern India are referred to herein as new species of a new genus, Capitamon n. gen., i.e., C. mizoramense n. gen., n. sp. from Mizoram and C. clarki n. gen., n. sp. probably from Nagaland. Capitamon n. gen. also includes two new species, i.e., C. capitatum n. gen., n. sp. (type species) from Arunachal Pradesh and Nagaland, and C. meitei n. gen., n. sp. from Manipur. Indochinamon manipurense (Alcock, 1909) is also assigned to Capitamon n. gen. as it possesses the characteristics of the new genus. Capitamon n. gen. is thus known by five nominal species from northeastern India, while I. beieri is restricted to its type locality in Myanmar, with the previous Indian records revealed to be erroneous. With the exclusion of I. manipurense, Indochinamon Yeo & Ng, 2007, now contains 42 species. An identification key to the species of Capitamon n. gen. is provided.

Keywords: Crustacea, Potamiscinae, Capitamon, Myanmar, identification key, new combination, new species, new genus.

 Capitamon n. gen., 

C. capitatum n. gen., n. sp. (type species) 

 Indochinamon manipurense (Alcock, 1909) is also assigned to Capitamon n. gen. 

Etymology. All the known congeners of the new genus have an ultimate article of the male first gonopod that resembles a bird's head. The genus name is therefore derived from caput, Latin for head, in arbitrary combination with the genus name Potamon. The gender of the generic name is neuter.

Distribution. Capitamon n.gen.is currently known from northeastern India, with its nominal species recorded from Arunachal Pradesh, Manipur, Mizoram and Nagaland states (Fig.1).

C. capitatum n. gen., n. sp. (type species) from Arunachal Pradesh and Nagaland, 

 C. mizoramense n. gen., n. sp. from Mizoram 

C. clarki n. gen., n. sp. probably from Nagaland. 

C. meitei n. gen., n. sp. from Manipur.

Sameer K. PATI, Santanu MITRA and Peter K. L. NG. 2024. Identity of the Freshwater Crab Indochinamon beieri (Pretzmann, 1966), with the Description of A New Genus and Four New Species from northeastern India (Decapoda, Brachyura, Potamidae). Zoosystema. 46(23); 589-615. 

 sciencepress.MNHN.fr/en/periodiques/zoosystema/46/23

  x.com/Publi_MNHN/status/1841516944169521576

[Crustacea • 2025] Quadrimaera sirindhornae • A New Species of Quadrimaera (Amphipoda: Maeridae) from Coral Reefs of Chon Buri Province, Thailand

 

Quadrimaera sirindhornae    

Boonyanusith, Putchakarn & Wongkamhaeng, 2025

 Tropical Natural History. Suppl. 8 

แอมฟิพอดเจ้าฟ้า  ||  DOI: doi.org/10.58837/tnh.25.8.267553

Abstract

Quadrimaera sirindhornae sp. nov. was described from specimens collected from algae in a coral reef in Chon Buri Province, Thailand. The new amphipod species can be distinguished from its closest relative by its accessory flagellum with seven articles, gnathopod 2 propodus 1.8x longer than wide, uropod 3 ratio of outer ramus and peduncle is 1.2. The illustration and comparison of diagnostic charac-teristics in male Quadrimaera reported in Southeast Asia were provided.

Keywords: Amphipoda, new species, algal bed, Gulf of Thailand

Quadrimaera sirindhornae sp. nov. 

แอมฟิพอดเจ้าฟ้า

Chaichat Boonyanusith, Sumaitt Putchakarn and Koraon Wongkamhaeng. 2025. A New Species of Quadrimaera (Amphipoda: Maeridae) from Coral Reefs of Chon Buri Province, Thailand.  Tropical Natural History. Suppl. 8;  472-480. DOI: doi.org/10.58837/tnh.25.8.267553 [2025-11-17]

[Botany • 2025] Strobilanthes sirindhorniae (Acanthaceae) • A New Species from Thailand

 

Strobilanthes sirindhorniae Kladwong & Chantar., 

in Kladwong, Modsang et Chantaranothai, 2025. 

Tropical Natural History. Supple. 8; 

ฮ่อมสิรินธร  ||  DOI: doi.org/10.58837/tnh.25.8.267434

Abstract

A species new to science, belonging to Strobilanthes from Thailand is described. Strobilanthes sirindhorniae Kladwong & Chantar., sp. nov. is found on limestone in northern Thailand. It is morphologically similar to S. maxwellii J.R.I.Wood and S. rosea Nees. A comparison table with similar and closely related species and a distribution map, and an illustration of S. sirindhorniae sp. nov. are provided.

 Strobilanthes sirindhorniae Kladwong & Chantar., sp. nov.

ฮ่อมสิรินธร

Pornchai Kladwong, Naphat Modsang and Pranom Chantaranothai. 2025. A New Species of Strobilanthes Blume (Acanthaceae) from Thailand. Tropical Natural History. Supple. 8; 220-226. DOI: doi.org/10.58837/tnh.25.8.267434 [2025-10-14]

[Botany • 2025] Utricularia damingshanensis (Lentibulariaceae) • A New Species from Guangxi, China

  

Utricularia damingshanensis S. Wu & Z. Z. Li, 

in Li, Wu, Nong, G.-R. Zhou, P.-L. Zhou, Lin, Outang, Jobson et Shao, 2025.  

大明山挖耳草 — DOI: doi.org/10.11646/phytotaxa.733.2.7 

Abstract  

Utricularia damingshanensis (Lentibulariaceae), a new species from Guangxi, China, is described and illustrated. It resembles U. caerulea and U. warburgii but differs in having a corolla palate with four hooked processes on the distal margin; lower calyx lobe distinctly shorter than the upper; distinctly striped corolla with 8–15 deep violet lines on the lower lip and 6–9 radiating lines on the upper lip, as well as a helmet-like swelling at the base of the lower lip. Phylogenetic analysis based on nrITS, rps16, and trnD–trnT strongly supported its placement in sect. Nigrescentes as sister to U. warburgii. Both morphological and molecular evidence support its status as a new species.

Utricularia, sect. Nigrescentes, phylogeny, taxonomy, new species, Eudicots

Utricularia damingshanensi

ZHI-ZHONG LI, SHUANG WU, DONG-XIN NONG, GUANG-RONG ZHOU, PI-LIN ZHOU, LI LIN, XUHONG OUYANG, RICHARD W. JOBSON and JIAN-WEN SHAO. 2025. Utricularia damingshanensis (Lentibulariaceae), A New Species from Guangxi, China. Phytotaxa. 733(2); 245-252. DOI: doi.org/10.11646/phytotaxa.733.2.7 [2025-12-11]

广西大明山发现植物新种——大明山挖耳草

[Botany • 2025] Curcuma corallina (Zingiberaceae: Zingiberoideae) • A New Species from south-central Vietnam

Curcuma corallina N.S.Lý & Škorničk.

in Phan, Nguyễn, Cao, Lý et Leong-Škorničková, 2025. 

 Nghệ hồng san hô, Nghệ san hô  ||  Gard. Bull. Singapore. 77(2); 

ABSTRACT

 Curcuma corallina N.S.Lý & Škorničk., a new ginger species discovered in the south-central region of Vietnam, is described here with colour plates and notes on its distribution, habitat, phenology, etymology, and a preliminary IUCN conservation assessment. It is placed in Curcuma subg. Ecomatae Škorničk. & Šída f. and, for diagnostic purposes, is compared to C. rhomba Mood & K.Larsen, which is superficially similar in overall plant habit, a lack of bracteoles, and flower colour, but differs in rhizome structure, and the shape, size and colour of various floral parts. 

Keywords. Curcuma rhomba, Curcuma subgenus Ecomatae, deciduous forest, endemic species, monocots, Zingibereae

Curcuma corallina N.S.Lý & Škorničk.
A. Flowering plant in natural habit. B. Inflorescence (top view). C. Flowers (front view). D. Basal part of a flowering plant showing rhizome with root tubers, pseudostem with leaf sheaths and petioles, and inflorescences.

All from the type collection, Lý-1916. (Photos: A, B, N.G. Cao; C, D, N.S. Lý)

Curcuma corallina N.S.Lý & Škorničk.
A. Flowering plant. B. Rhizome with root tubers. C. Leaf (abaxial view). D. Ligules from a flowering plant (left) and a young plant (right). E. Inflorescence. F. Fertile bracts. G. Stamen in front, back and side views. H. A bract from the middle part of the thyrse supporting two flowers followed by the flower dissection: dorsal corolla lobe, lateral staminodes, lateral corolla lobes and labellum, calyx, floral tube with ovary and stamen attached, longitudinal dissection of floral tube, and ovary and epigynous glands.

All from the type collection, Lý-1916. 

(Photos: A, D, N.G. Cao; B, C, E–H, N.S. Lý)

 

Curcuma corallina N.S.Lý & Škorničk., sp. nov. 

Resembles C. rhomba Mood & K.Larsen in its overall plant habit, lack of bracteoles, flower colour, and anther shape, but differs in having a much-branched rhizome (vs rhizome unbranched, except a single branch leading to a new shoot); coral pink and larger corolla lobes (dorsal 23–36 × 8–13 mm, lateral 21–24 × 8–11 mm vs dorsal c. 19 × 5 mm, lateral c. 18 × 4 mm, all rich red); a larger, broadly obovate labellum (19–24 × 16–21 mm) with a bluntly bilobed apex and an incision not exceeding one-third the length of the labellum (vs labellum c. 17 × 9 mm, narrowly rhomboid with a sharply bilobed apex and incision extending beyond half the length of the labellum); larger, broadly ovate staminodes (18–26 × 14–20 mm) that are rich orange with a paler base (vs c. 17 × 11 mm, narrowly rhomboid, uniformly orange with dark red dots at the base); and a shorter, truncate to slightly emarginate anther crest c. 0.5 mm long, not exceeding the stigma (vs rounded crest c. 1 mm long, exceeding the stigma). 

– TYPE: Vietnam, Ninh Thuan Province [now Khan Hoa Province], Bac Ai District, Phuoc Binh Commune, Phuoc Binh National Park [now Nui Chua-Phuoc Binh NP], ...

 

Etymology. The specific epithet is derived from Latin ‘corallinus’ and refers to the coral pink bracts and corolla lobes of the new species. 

Proposed vernacular name and uses. Nghệ hồng san hô, Nghệ san hô (Vietnamese; coral pink turmeric). No uses were so far reported by the local people.

Phan, N.M., Nguyễn, A.T., Cao, N.G., Lý, N.S. & Leong-Škorničková, J. 2025. Curcuma corallina (Zingiberaceae: Zingiberoideae), A New Species from south-central Vietnam. Gard. Bull. Singapore. 77(2); 249 - 258. 

[Botany • 2025] Homalomena polyneura (Araceae) • A New spectacular Species from Indonesian New Guinea

 

Homalomena polyneura A.S.D.Irsyam & M.R.Hariri, 

Irsyam, Husaini, Pratami, Raynalta, Setiawan et Hariri, 2025.

Gard. Bull. Singapore. 77(2); 219 - 223.

  Researchgate.net/publication/398711786

ABSTRACT. 

A new ornamental species of Homalomena Schott, H. polyneura A.S.D.Irsyam & M.R.Hariri, is formally described from Central Papua, Indonesia. 

Keywords. Aroid, Malesia, Philodendreae, rheophytic

 Homalomena polyneura A.S.D.Irsyam & M.R.Hariri.
A, B. Habit. C, D. Leaf showing both adaxial and abaxial surfaces. E. Spathe. F. Spadix. G. Close-up of staminate flowers. H. Close-up of pistillate flowers. I. Close-up of post-anthesis pistillate flowers.

(Photos: A-D, E. Raynalta; E-I, M.R. Hariri)

Homalomena polyneura A.S.D.Irsyam & M.R.Hariri, sp. nov.

 Homalomena polyneura exhibits morphological affinities with H. steenisiana A.Hay, yet it can be readily distinguished by 5–6 primary lateral veins (vs 2–3), inflorescences solitary or 2 together (vs few to c. 16 together), spathe reddish to dark brown (vs green), female zone shorter than male zone (vs female and male zones approximately equal in length), and pistillate flowers lacking staminodes (vs staminodes present).

Etymology. The specific epithet polyneura is derived from the Greek poly- (many) and neuron (nerve, vein), in reference to the conspicuous abundance of raised lateral veins on the adaxial surface of the leaf lamina.

Irsyam, A.S.D., Husaini, I.P.A., Pratami, M.P., Raynalta, E. Setiawan A.A. & Hariri, M.R. 2025. A New spectacular Species of Homalomena (Araceae) from Indonesian New Guinea. Gard. Bull. Singapore. 77(2); 219 - 223. 

 Researchgate.net/publication/398711786_A_new_spectacular_species_of_Homalomena_from_Indonesian_New_Guinea

[Herpetology • 2025] Hebius vogeli • Taxonomic Reassessment of Hebius optatus (Hu & Zhao, 1966) (Squamata: Natricidae), with the Description of a New Species from Vietnam and China

Hebius vogeli

Nguyen, Li, Huang, Han, Nguyen, Poyarkov, David & Ren, 2025

 DOI: doi.org/10.3724/ahr.2095-0357.2025.0026

  Researchgate.net/publication/399063693

Abstract

A comprehensive taxonomic reassessment of the Hebius optatus species complex, integrating molecular data and morphological data, has led to the recognition and description of a previously overlooked species from northern Vietnam and the Guangxi Zhuang Autonomous Region, China, herein described as Hebius vogeli sp. nov. Phylogenetic analyses reveal that Hebius vogeli sp. nov. is closely related to H. sauteri and H. optatus sensu stricto. Uncorrected p-distances based on cytochrome b sequences indicate a divergence of 10.74%–11.73% between Hebius vogeli sp. nov. and H. optatus. The new species differs from H. optatus by a combination of characters, including a higher number of subcaudal scales, a greater total number of ventral and subcaudal scales, and distinct ventral coloration. Hebius vogeli sp. nov. appears to be geographically restricted to northern Vietnam and the adjacent region of Guangxi Zhuang Autonomous Region, China, making its distribution allopatric from that of H. optatus. The Pearl River is hypothesized to serve as a biogeographic barrier separating the two taxa. Accordingly, we recommend the exclusion of H. optatus from the herpetofauna of Vietnam. Based on IUCN Red List criteria, we propose that Hebius vogeli sp. nov. be assessed as Least Concern (LC). Our results emphasize both the underestimated diversity within Hebius and the need for continued integrative taxonomic efforts, particularly in the Vietnam-China borderlands, where cryptic diversity remains largely unexplored.

 Keywords: Asia, cytochrome b, Hebius vogeli sp. nov., morphology, Pearl River, taxonomy

Photographs in life of Hebius vogeli sp. nov. in Vietnam:
(A–C) MNHN 1997.3305 (paratype, adult male) from Tam Dao NP, Phu Tho;
(D–H) uncollected specimen (adult, sex unknown) from Cuc Phuong NP, Ninh Binh (iNaturalist observation 182072957); (I) another uncollected specimen (adult, sex unknown) from Cuc Phuong NP, Ninh Binh.

Photographs by G. VOGEL (A–C), M. LUCASSEN (D–H), and J. HAUSER (I).

 Hebius vogeli sp. nov. 

Tan Van NGUYEN, Maoliang LI, Junjie HUANG, Buying HAN, Duc Trong NGUYEN, Nikolay A. POYARKOV, Patrick DAVID and Jinlong REN. 2025. Taxonomic Reassessment of Hebius optatus (Hu & Zhao, 1966) (Squamata: Natricidae), with the Description of a New Species from Vietnam and China. Asian Herpetological Research. 16(4); 377 - 391. DOI: doi.org/10.3724/ahr.2095-0357.2025.0026 [Dec 5, 2025]

https://cstr.cn/32242.14.ahr.2095-0357.2025.0026

  facebook.com/tansifasv/posts/122233409438144982

  Researchgate.net/publication/399063693_Taxonomic_Reassessment_of_Hebius_optatus_with_the_Description_of_a_New_Species_from_Vietnam_and_China

[Mollusca • 2025] Hypselostoma pongrati & H. sichomphuense, ... • Two New Species of terrestrial Microsnails of the genus Hypselostoma W.H. Benson, 1856 (Gastropoda: Eupulmonata: Hypselostomatidae) from northeastern Thailand

 

A, B. Hypselostoma pongrati sp. nov. 
 C, D. Hypselostoma sichomphuense sp. nov.  

Tanmuangpak & S. Tumpeesuwan,

in Tanmuangpak, Nahok, Chanlabut, C. Tumpeesuwan et S. Tumpeesuwan, 2025.

 DOI: doi.org/10.3897/zookeys.1265.160661

Abstract

Two new species of hypselostomatid land microsnails, Hypselostoma pongrati Tanmuangpak & S. Tumpeesuwan, sp. nov. from Nong Bua Lamphu Province and H. sichomphuense Tanmuangpak & S. Tumpeesuwan, sp. nov. from Khon Kaen Province, are described based on the morphology of their shell, radula, and genital system. Both new species are very similar in shell shape to H. phupaman from Chaiyaphum Province, possessing a double-keeled last whorl. However, H. pongrati Tanmuangpak & S. Tumpeesuwan, sp. nov. is distinguished by the absence of apertural barriers, whereas H. sichomphuense Tanmuangpak & S. Tumpeesuwan, sp. nov. possesses three apertural barriers, and H. phupaman possesses six or seven. The three species were found on isolated limestone hills in the Chaiyaphum-Khon Kaen-Nong Bua Lamphu-Loei area.

Key words: Apertural barriers, double-keeled last whorl, genital system, limestone hills, radula

Taxonomy

Family Hypselostomatidae Zilch, 1959

Genus Hypselostoma W.H. Benson, 1856

Living Hypselostoma spp.
A, B. Hypselostoma pongrati sp. nov. paratype NHLRU015;
C, D. H. sichomphuense sp. nov. paratype NHLRU033.

 Hypselostoma pongrati Tanmuangpak & S. Tumpeesuwan, sp. nov.

Diagnosis. This new species has a prominent keel on the upper part of the last whorl and a weaker keel on the lower part. Apertural barriers absent (Fig. 3A, G, H, L). Terminal part of the last whorl is adnated to penultimate whorl.

Etymology. This new species is dedicated to the late Pongrat Dumrongrojwattana, our highly respected senior who was an expert on microsnails and who provided us with many land snails references, knowledge, and inspiration.

 Hypselostoma sichomphuense Tanmuangpak & S. Tumpeesuwan, sp. nov.

 

Diagnosis. This new species differs from Hypselostoma phupaman by the presence of a non-prominent lower keel on the last whorl and the absence of basal and parietal apertural barriers. Aperture has three smooth tooth-like swellings (Fig. 4A, G–I), whereas there are no apertural barriers in H. pongrati sp. nov. (Fig. 3A, G–I). Spire shorter than the spire of H. pongrati sp. nov.

Etymology. The specific epithet sichomphuense refers to Si Chomphu District, Khon Kaen Province, northeastern Thailand, where this species was discovered.

 Kitti Tanmuangpak, Benchawan Nahok, Utain Chanlabut, Chanidaporn Tumpeesuwan and Sakboworn Tumpeesuwan. 2025. Two New Species of terrestrial Microsnails of the genus Hypselostoma W.H. Benson, 1856 (Gastropoda, Eupulmonata, Hypselostomatidae) from northeastern Thailand. ZooKeys. 1265: 49-67. DOI: doi.org/10.3897/zookeys.1265.160661

[Entomology • 2025] Coeliccia sirindhornae • A New Damselfly (Odonata: Platycnemididae) from Northwest Thailand

Coeliccia sirindhornae

Makbun, Phan, Ignatius & Keetapithchayakul, 2025

 Tropical Natural History. Suppl. 8 

แมลงปอเข็มท้องยาวเทพรัตน์  ||  DOI: doi.org/10.58837/tnh.25.8.266860 

photographed by Noppadon Makbun

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Abstract

A new species of the genus Coeliccia Kirby, 1890, C. sirindhornae sp. nov., is described based on specimens of both sexes collected from Kanchanaburi Province, Thailand. This species can be differentiated from its congeners by its unique combination of morphological characters, including the shape of antehumeral stripe, the structure and pattern of prothorax, and the shape of anal appendages in both sexes, and the markings on the terminal abdominal segments in female.

Keywords: Damselfly, new species, Zygoptera, Kanchanaburi, Coeliccia

Coeliccia sirindhornae sp. nov. A. Holotype ♂. B. Paratype ♀.

Coeliccia sirindhornae sp. nov. 

แมลงปอเข็มท้องยาวเทพรัตน์   

Coeliccia sirindhornae sp. nov., in typical location.
A. Male. B. Female.
Kanchanaburi, Sangkhla Buri, Prangphle, 2–iv–2017

 photographed by Noppadon Makbun

Noppadon Makbun, Quoc Toan Phan, Kaewpawika Jitthamma Ignatius and Tosaphol Saetung Keetapithchayakul. 2025. Coeliccia sirindhornae sp. nov., A New Damselfly (Odonata: Platycnemididae) from Northwest Thailand.  Tropical Natural History. Suppl. 8;  415-425. DOI: doi.org/10.58837/tnh.25.8.266860 

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[Invertebrate • 2025] Amynthas septuaginta & Metaphire fidelis • Two New Earthworm Species (Oligochaeta: Megascolecidae) from the Mekong River, Thailand

Amynthas septuaginta  Bantaowong & Panha,

in Bantaowong, Chanabun, Nantarat et Panha, 2025. 

  Tropical Natural History. Suppl. 8; 

ไส้เดือนริมโขงบึงกาฬ  ||  DOI: doi.org/10.58837/tnh.25.8.267154 

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Abstract

Two new earthworm species are described from the Mekong River, Thailand, namely Amynthas septuaginta Bantaowong & Panha, sp. nov. and Metaphire fidelis Bantaowong & Panha, sp. nov. The former is a small Mekong earthworm in the A. aeruginosus species group with two pairs of spermathecal pores in 7/8-8/9. It is mainly distinguished from other Amynthas from the Mekong River by its small size (less than 50 mm), and with no genital markings at the male pore region. The latter is distinguished by having four pairs of spermathecal pores in 5/6-8/9, genital markings paired on xvii, ampulla paddle-shaped, and with diverticulum as a slender tube with a loose loop. Morphological description, taxonomic comments, illustrations, and distribution are provided.

Keywords: Amynthas, Metaphire, taxonomy, Mekong River

External and internal morphology of holotype (CUMZ3831) of Amynthas septuaginta sp. nov.,
A. external ventral view; B. internal dorsal view; C. spermathecae. Dark arrow indicates the connection of the spermathecae and spermathecal pore.

 Amynthas septuaginta Bantaowong & Panha, sp. nov. 

ไส้เดือนริมโขงบึงกาฬ

Metaphire fidelis Bantaowong & Panha, sp. nov.

 ไส้เดือนภักดีแม่น้ำโขง

Ueangfa Bantaowong, Ratmanee Chanabun, Nattawadee Nantarat and Somsak Panha. 2025. Description of Two New Earthworm Species (Oligochaeta: Megascolecidae) from the Mekong River, Thailand.  Tropical Natural History. Suppl. 8; 305-312. DOI: doi.org/10.58837/tnh.25.8.267154  [2025-10-20]

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