[Crustacea • 2016] Macrobrachium spelaeus | กุ้งถ้ำพระวังแดง • A New Species of Stygobitic Freshwater Prawn (Decapoda: Palaemonidae) from northern Thailand

กุ้งถ้ำพระวังแดง | Macrobrachium spelaeus 

Cai & Vidthayanon, 2016
  LKCNHM.nus.edu.sg

Abstract

 A new species of stygobitic freshwater prawn, Macrobrachium spelaeus from Tham Phra Wang Daeng, Pitsanulok Province, in northern Thailand, is described and illustrated in detail. Morphological comparisons with allied epigean species M. dienbienphuense and known stygobitic congener M. poeti are given. The new species is characterised by its reduced eyes, smooth and slender second pereiopods, hairy chelae and short carpus of second pereiopods, and elongated telson.

Key words. New species, Macrobrachium, stygobitic, freshwater prawn, Thailand

   

TAXONOMY

Palaemonidae Rafinesque, 1815

Macrobrachium Bate, 1868

Macrobrachium spelaeus, new species

Colouration (live). Yellowish pale cephalothorax with pale yellow and brown visceral mass, rostrum translucent, eyes black, abdomen opaque with brownish hue dorsally. Hairs on chelae pale brown, antennas and appendages opaque.

Habitat. Macrobrachium spelaeus is known only from shallow (0.3–1 m depth) subterranean streams in the type locality, over 100 m from the cave entrance, at Tham Phra Wang Daeng of the Tham Phra Karst in Klong Chompu area of Thung Salaeng Luang National Park.

Etymology. The new species is named spelaeus (L., caved-welling), after its stygobitic habit.

Yixiong Cai and Chavalit Vidthayanon. 2016. Macrobrachium spelaeus, A New Species of Stygobitic Freshwater Prawn from Thailand (Decapoda: Palaemonidae).  RAFFLES BULLETIN OF ZOOLOGY. 64: 117–122. 

https://lkcnhm.nus.edu.sg/nus/images/data/raffles_bulletin_of_zoology/vol64/64rbz117-122.pdf

กุ้งถ้ำพระวังแดง  อีกหนึ่งชนิดใหม่ จากถ้ำพระวังแดง อช. ทุ่งแสลงหลวง พิษณุโลก ยังมีอีกหลาย species ที่ยังไม่มีการสำรวจในภูมินิเวศเขาหินปูนนี้ 

facebook.com/ChavalitVidthayanon

[Ichthyology • 2014] A Review of the Glyptosternine Catfish genus Exostoma Blyth 1860 (Teleostei: Siluriformes) from Thailand, with Descriptions of Two New Species; Exostoma effrenum & E. peregrinator

Abstract

We review members of the sisorid catfish genus Exostoma known from Thailand. Three species are recognized, of which two from the headwaters of the Chao Phraya River drainage in northwestern Thailand, are described here as new: Exostoma effrenum and E. peregrinator. In addition to the two new species, E. berdmorei (which is here redescribed) is also known from the Salween River drainage in western Thailand. The three species can be distinguished from each other and other congeners by the morphologies of the adipose and caudal fins, as well as morphometric data for the eye diameter, head width, dorsal-to-adipose distance, body depth at anus, caudal-peduncle length, caudal-peduncle depth, and numbers of branched pectoral-fin rays and preanal vertebrae.

 Keywords: Sisoridae, Glyptosternini, Salween River, Chao Phraya River

Ng, Heok H. & Chavalit Vidthayanon. 2014. A Review of the Glyptosternine Catfish genus Exostoma Blyth 1860 from Thailand, with Descriptions of Two New Species (Teleostei: Siluriformes). Zootaxa. 3869(4): 420–434.

http://dx.doi.org/10.11646/zootaxa.3869.4.6
http://www.academia.edu/8724863/A_review_of_the_glyptosternine_catfish_genus_Exostoma_Blyth_1860_from_Thailand_with_descriptions_of_two_new_species_Teleostei_Siluriformes_

[Ichthyology • 2003] ปลาขยุยยักษ์พรหมพิราม •Acrochordonichthys gyrinus • A New Species of akysid Catfish (Teleostei: Siluriformes) from Yom River, Chao Phraya drainage, Thailand

ขยุยยักษ์พรหมพิราม •  Acrochordonichthys gyrinus 

Vidthayanon & Ng, 2003

photo: siamensis.org 

Acrochordonichthys gyrinus, a new species of akysid catfish belonging to the A. ischnosoma species group, is described from the Chao Phraya River drainage in Thailand. It can be distinguished from congeners by a concave posterior margin of the pectoral fin and the unique combination of the following characteristics: head depth 9.8–11.4% SL; dorsal to adipose distance 7.4–8.6% SL; body depth at anus 8.3–10.5% SL; maximum width of humeral process 16.3% its length; and anterior margin of anal fin and posterior margin of adipose fin straight. This species represents the northernmost distribution of the genus.

Key words: Akysidae, catfish, Yom River, Chao Phraya drainage

ขยุยยักษ์พรหมพิราม

Acrochordonichthys gyrinus Vidthayanon & Ng, 2003

photo: siamensis.org 

Vidthayanon, Chavalit; Ng, Heok Hee. 2003. Acrochordonichthys gyrinus, A New Species of akysid Catfish (Teleostei: Siluriformes) from Thailand. Zootaxa. 183: 1–7.

 mapress.com/zootaxa/2003f/z00183f.pdf

http://www.fisheries.go.th/it-database/fish/product.php?CatID=16

[Ichthyology • 2013] Tetraodon barbatus | ปลาปักเป้าปากดำ • Validation of Tetraodon barbatus Roberts, 1998, a Freshwater Pufferfish (Family Tetraodontidae) from the Mekong River

Abstract

 The freshwater pufferfish, Tetraodon barbatus Roberts, 1998, previously considered as a synonym of Tetraodon cambodgiensis Chabanaud, 1923, is validated. It differs distinctly from T. cambodgiensis by the combination of characters of that its caudal peduncle is smooth without small spinules and the head is broader (head width at preorbital, post orbital and nape: 54.1–59.8, 69.1–77.8 and 76.5–86.8 % head length (HL), respectively, in T. barbatus vs. 48.7–53.3, 60.2–64.3 and 68.5–74.3 %HL, respectively, in T. cambodgiensis). 

Key words: Tetraodon barbatus, valid species, Mekong River 

Geographic distribution.– T. barbatus is only known from the middle and lower Mekong basin (Roberts, 1998). The data from the field trips in Mekong basin of Thailand revealed that T. barbatus is not only found in Mekong mainstream but also in its larger tributaries, especially in places with rocky, sandy or muddy substrate. Moreover, T. barbatus inhabits rapids and is often found in the same habitat as T. suvattii and T. baileyi.

Pasakorn Saenjundaeng, Chaiwut Grudpun and Chavalit Vidthayanon. 2013. Validation of Tetraodon barbatus Roberts, 1998, a Freshwater Pufferfish (Family Tetraodontidae) from the Mekong River. Tropical Natural History. 13(2): 77-85

http://www.biology.sc.chula.ac.th/TNH/TNH_13_2/77-85%20Saenjundaeng.pdf

[Ichthyology • 2009] ปลาค้างคาวคุณสืบ | Oreoglanis nakasathieni • a new Torrent Catfish Genus Oreoglanis (Teleostei: Sisoridae) from northern Thailand

photo: N. Panitvong

ปลาค้างคาวคุณสืบ Oreoglanis nakasathieni Vidthayanon, Saenjundaeng & Ng, 2009

 ปลาเฉพาะถิ่นของลุ่มน้ำแม่แตง พบในเขตรักษาพันธุ์สัตว์ป่าดอยเชียงดาวและใกล้เคียงเท่านั้น
ตั้งชื่อเพื่อเป็นเกียรติแก่ สืบ นาคะเสถียร (พ.ศ. 2492 - 2533)

http://facebook.com/photo.php?fbid=583223628386537 

"In honor to the late Mr. Seub Nakasathian (1949 - 1990), the Thai wildlife biologist who devoted his life for wildlife research and awareness rising on conservation and management of Thai Western Forest Complex."

______________________

Abstract

We describe eight new species of the sisorid catfish genus Oreoglanis from the Chao Phraya, Mekong and Salween river drainages in northern and western Thailand. The new species are diagnosed by a combination of morphology of maxillary-barbel tip, lower-lip morphology, extent of pectoral fin, fusion of the adipose fin with the upper procurrent caudal-fin rays, caudal-fin morphology, and the relative proportions of the head, snout, nasal barbel, interorbital distance, eye, body depth at anus, adipose fin, caudal peduncle and post-adipose distance. The taxonomy of O. pumatensis, a poorly known species from Vietnam is also discussed; it is considered a junior subjective synonym of O. infulatus here.

Original description:

Vidthayanon, C., Saenjundaeng, P., and Ng, H. H. 2009. Eight new species of the Torrent Catfish Genus Oreoglanis (Teleostei: Sisoridae) from Thailand. Ichthyological Exploration of Freshwaters. 14: 127-156. http://www.pfeil-verlag.de/04biol/pdf/ief20_2_04.pdf

http://www.manager.co.th/QOL/ViewNews.aspx?NewsID=9480000071813

[Ichthyology • 2013] Tetraodon palustris | ปลาปักเป้าบึง • a new freshwater pufferfish (Tetraodontiformes: Tetraodontidae) from the Mekong Basin of Thailand

 Tetraodon palustris Saenjundaeng, Vidthayanon & Grudpun. 2013

Abstract

Tetraodon palustris, new species, is described from the Mekong basin of Thailand. Tetraodon palustris differs from T. cochinchinensis and T. fangi in having no ocellus on the flank and spinules dorsally from the interorbital region to the end of the dorsal-fin base. Tetraodon cochinchinensis is distinguished from T. fangi by having a longer snout (43.5–49.2% HL in T. cochinchinensis vs. 37.9–41.1% HL in T. fangi) and is covered with spinules dorsally from the front of the nasal organs to the end of the dorsal-fin base (vs. from the front of the eyes to the end of the dorsal-fin base in T. fangi).

Key words: Tetraodon, new species, Mekong basin

Saenjundaeng, Pasakorn, Chavalit Vidthayanon & Chaiwut Grudpun. 2013. Tetraodon palustris, a new freshwater pufferfish (Tetraodontiformes: Tetraodontidae) from the Mekong Basin of Thailand. Zootaxa. 3686(1): 77–84. 

http://mapress.com/zootaxa/2013/f/z03686p084f.pdf

http://facebook.com/groups/122260101128398/permalink/596793467008390/

http://www.kku.ac.th/news/2013/July/นักวิจัย-คณะวิทยาศาสตร์ฯ-มข.วิทยาเขตหนองคาย-ค้นพบป.php