Showing posts with label Author: Chuaynkern. Show all posts
Showing posts with label Author: Chuaynkern. Show all posts

Wednesday, August 15, 2018

[Herpetology • 2018] Theloderma petilum | ปาดหลังยาวภูสวนทราย (Anura, Rhacophoridae) • A New Country Record for Thailand


Theloderma petilum (Stuart & Heatwole, 2004)

in Phusaensri, Kaewboribut, Phummisutthigoon, et al., 2018. 
ปาดหลังยาวภูสวนทราย  ||  ku.ac.th

We here report the first finding of a specimen of the treefrog Theloderma petilum (Stuart & Heatwole, 2004) in Thailand. To date, only four other individuals of this species were known from Laos and Vietnam. The female specimen of T. petilum collected at Huay Tap Ko Sod of Baan Huay Nam Phak, Na Haeo District, Loei...

ปาดหลังยาวภูสวนทราย Theloderma petilum (Stuart & Heatwole, 2004) เพศเมีย

Alytes. 36(1-4)alytes-journal.org  

ปาดหลังยาวภูสวนทราย เป็นชนิดสัตว์สะเทินน้ำสะเทินบกที่พบครั้งแรกในประเทศไทย ถือเป็นบันทึกแหล่งการกระจายแหล่งที่ 3 เพิ่มเติมจากที่พบในสาธารณรัฐสังคมนิยมเวียดนาม และสาธารณรัฐประชาธิปไตยประชาชนลาว 
ในประเทศไทยถูกค้นพบโดย คณะวิจัยที่มีประกอบด้วย ผศ. ดร. ประทีป ด้วงแค คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ ร่วมกับนักวิชาการจากรมอุทยานแห่งชาติ สัตว์ป่า และพันธุ์พืช และ มหาวิทยาลัยขอนแก่น ได้รับตีพิมพ์ในวารสาร Alytes 36 (1-4) ระหว่างหน้าที่ 289-299 ในปี พ.ศ. 2561


Samret Phusaensri, Thanawhat Kaewboribut, Sukpaporn Phummisutthigoon, Nithina Kaewtongkum, Montri Youjaruen, Pongsathorn Tongpun, Hathaipat Khongcharoensuk, Pechrkawin Nurngsomsri, Chantip Chuaynkern, Prateep Duengkae and Yodchaiy Chuaynkern. 2018. Theloderma petilum (Anura, Rhacophoridae): A New Country Record for Thailand. Alytes. 36(1-4); 289–299.

การค้นพบพืชชนิดใหม่ของโลก และชนิดสัตว์สะเทินน้ำสะเทินบกครั้งแรกในประเทศไทย
ระหว่างเดือนมิถุนายน ถึงเดือนสิงหาคม พ.ศ. 2561
ของอาจารย์ภาควิชาชีววิทยาป่าไม้ คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์


Abstract: A small rhacophorid, Philautus petilus known from only the female holotype, is recorded for the first time outside of the type locality in Laos. Three specimens, containing the first known males of the species, were collected from Muong Nhe Nature Reserve in Dien Bien Province, northwestern Vietnam. The Vietnamese specimens are identified as P. petilus based on morphological similarities with the holotype from Laos. In addition, our molecular data verify the transfer of this species from Philautus to the genus Theloderma.

Keywords: Philautus, Theloderma, New record, Phylogeny, Taxonomy, Muong Nhe Nature Reserve, Dien Bien Province

 Tao Thien Nguyen, Dzung Trung Le, Son Hung Lan Nguyen, Masafumi Matsui and Truong Quang Nguyen. 2014. First Record of Philautus petilus Stuart and Heatwole, 2004 (Amphibia: Anura: Rhacophoridae) from Vietnam and Its Phylogenetic Position. Current Herpetology. 33(2); 112-120. 

Bryan L. Stuart and Harold Heatwole. 2004. A New Philautus (Amphibia: Rhacophoridae) from northern Laos. Asiatic Herpetological Research. 10: 17-21. 

Sunday, December 20, 2015

[Herpetology • 2015] Clinotarsus penelope | กบเขาสูง • When Young are More Conspicuous than Adults: A New Ranid Species (Anura: Ranidae) from Thailand revealed by its Tadpole


กบเขาสูง | Hill Frog | Clinotarsus penelope
Grosjean, Bordoloi, Chuaynkern, Chakravarty & Ohler, 2015
DOI: 10.11646/zootaxa.4058.4.2
photo: C. Deekrachang | siamensis.org

Abstract

Tadpoles of Clinotarsus alticola collected nearby the type locality in Assam, India are barcoded and described. A detailed morphological and morphometrical description of the specimens, along with a study of the anatomy of the buccal cavity are provided. A comparison of these tadpoles with “Clinotarsus alticola” tadpoles from peninsular Thailand and of the genetic variation of a fragment of their mtDNA 16S gene led us to assign the population of peninsular Thailand to a new species, Clinotarsus penelope sp. n. The holotype of the new species is chosen among the tadpole series as no adult could be found in the type locality. Presumed conspecific adults of nearby localities are morphologically described and compared to barcoded adults of Clinotarsus alticola, waiting for further molecular confirmation. The tadpole of the new species differs from that of C. alticola by a much greater size at comparative stages (e.g., 77.7 mm vs. 53.3 mm in stage 36, respectively), a black coloration (vs. a yellow-olive tinge), several ocelli on the tail muscle (vs. only one), a rounded snout (vs. a more pointed snout) and a different Keratodont Row Formula (KRF; nine keratodonts rows maximum on both labia in C. penelope vs. eight maximum in C. alticola). A discussion about the choice of the holotype, the assignment of adult specimens and the future confirmation of this assignment are provided, as well as a comparison with older descriptions of “Clinotarsus alticola” sensu lato tadpoles and with Clinotarsus curtipes tadpoles from Karnataka, India. The lectotype of Clinotarsus alticola is redescribed.

Keywords: Clinotarsus alticola, Ranidae, tadpole, holotype, India, Thailand, Amphibia


Distribution limited to the tadpole data (Fig. 10). Thailand: Namtok Raman Forest Park, Phang Nga Province (type locality). Localities of referred specimens: Kaeng Krachon National Park, Phetchaburi Province; Khao Sok National Park, Surat Thani Province; Khlong Palian at junction of streams arising from Nam Tok Ton Tok and Nam Tok Ton Te,Trang Province, Khlong Rang Waterfall, Ngao National  Park,  Pha  To,  Chumphon  Province. Smith (1930) mentioned the  presence  of  “Rana  alticola”  in  the  province of Nakhon Si Thammarat which fills a gap between the provinces of Surat Thani and of Trang.

Etymology. This species is dedicated to the daughter of the first author, Pénélope. The nomen is used as a noun in apposition to generic substantive.


Grosjean, Stéphane, Sabitry Bordoloi, Yodchaiy Chuaynkern, Paramita Chakravarty and Annemarie Ohler. 2015. When Young are More Conspicuous than Adults: A New Ranid Species (Anura: Ranidae) revealed by its Tadpole. Zootaxa. 4058(4): 471–498. DOI: 10.11646/zootaxa.4058.4.2

Sunday, December 25, 2011

[Herpetology • 2006] กบชะง่อนผาภูหลวง | Odorrana aureola | Phu Luang Rock Frog • Cascade Frog from Northeastern Thailand



กบชะง่อนผาภูหลวง
Odorrana aureola Stuart, Chuaynkern, Chan-ard & Inger, 2006

Abstract
We describe three new species of frogs from eastern Thailand based on old and new material. These represent a species of Megophrys from Chantaburi and Sa Kaeo Provinces, a species of Odorrana from Loei Province, and a species of Fejervarya from Ubon Ratchatani Province. Tadpoles are assigned to the new species of Megophrys and Fejervarya and to a recently described species of Rhacophorus from eastern Thailand using molecular identification.


ETYMOLOGY— The specific epithet aureola taken from aureolus (L.) for ornamented with gold, in reference to the diagnostic yellow markings on the limbs and flanks of this species.

DISTRIBUTION AND ECOLOGY— Odorrana aureola is currently known only from Phu Luang Wildlife Sanctuary and Phu Kradueng National Park (Fig. 1) in Loei Province, Thailand. The Phu Luang specimens were collected at night (1915–2030 h) on boulders, rock outcrops and a fallen tree within 4 m of swift, 1–8-m-wide rocky streams near cascades, except FMNH 265922 was collected in the water at the edge of a 2-m-wide stream with slow current between two small dams. Odorrana aureola was collected in sympatry with an apparently undescribed species that morphologically resembles O. chloronota (e.g. FMNH 265931/THNHM 05126, FMNH 265932/THNHM 05127) but that is not the sister taxon of O. chloronota (Stuart et al., 2006).


Bangkok, Thailand, May 24, 2007 — A new species of color-changing frog found in northeastern Thailand sits motionless on the brown soil.
Named the Phu Luang Cliff frog after the national park where it lives, the amphibian, which can grow to 3.5 inches (8.9 centimeters) has a naturally green body that can turn brown.

Scientists have found the rare frog in mountain waterfalls and creeks between 3,280 to 4,291 feet (1,000 to 1,500 meters) above sea level, Tanya Chan-ard, curator of Bangkok's National Science Museum, told the Associated Press.

The frog was discovered a few years ago, although scientists have only recently began studying it, Tanya said. --- http://news.nationalgeographic.com/news/2007/05/photogalleries/wip-week30/photo4.html


แนะนำตัวอย่างอ้างอิง จากองค์การพิพิธภัณฑ์วิทยาศาสตร์แห่งชาติ
กบชะงอนผาภูหลวง (Odorrana aureola): http://tistr.or.th/tistr/code/tistrorg/ecological_note/en_200801.pdf

Stuart, B. L., Y. Chuayngern, T. Chan-ard and R.F. Inger. 2006. Three New Species of Frogs and a New Tadpole fromEastern Thailand. Fieldiana Zoology New Series. 111: 1-19.:

Tuesday, July 12, 2011

[Herpetology • 2006] อึ่งกรายหมอบุญส่ง | Xenophrys (Megophrys) lekaguli | Lekagul's Horned Frog • from Khao Soi Dao eastern Thailand



Figure 3 An adult male paratype of Megophrys lekaguli sp. nov. in life.


Xenophrys (Megophrys) lekaguli
(Stuart, Chuaynkern, Chan-ard & Inger, 2006)

Type locality: "Khao Soi Dao Wildlife Sanctuary, Chantaburi Province, Thailand, 600-700 m elevation".
Holotype: FMNH 213946.


Figure 2 The adult female holotype (fmnh 213946) of Megophrys lekaguli sp. nov. in preservative. Clockwise from upper left: palmar view of hand; plantar view of foot; lateral view of head; dorsal view; ventral view.


Synonyms
• Megophrys legkaguli Stuart, Chuaynkern, Chan-ard & Inger, 2006
• Xenophrys legkaguli (Stuart, Chuaynkern, Chan-ard & Inger, 2006)

Etymology
The specific epithet is a patronym for Dr. Boonsong Lekagul (1907–1992), biologist and conservationist, in recognition of his contributions to the herpetology of Thailand.

Comparisons
Twelve other species of Megophrys are known to occur within the vicinity of eastern Thailand (Thailand, Myanmar, Cambodia, Laos, and Vietnam): M. aceras (Boulenger, 1903), M. auralensis Ohler, Swan and Daltry, 2002, M. brachykolos Inger and Romer, 1961, M. jingdongensis Fei and Ye in Fei, Ye and Huang, 1983, M. kuatunensis (Pope, 1929), M. longipes (Boulenger, 1885), M. major (Boulenger, 1908), M. minor Stejneger, 1926, M. nasuta (Schlegel, 1858), M. pachyproctus Huang in Huang and Fei, 1981, M. palpebralespinosa Bourret, 1937, and M. parva (Boulenger, 1893).

• Megophrys lekaguli differs from M. brachykolos, M. kuatunensis, M. minor, M. pachyproctus, M. palpebralespinosa, and M. parva by having much larger body size (males with SVL 56.6–66.6 and females with SVL 71.8–94.0 in lekaguli; males < 48, females < 55 in brachykolos, kuatunensis, minor, pachyproctus, palpebralespinosa, and parva).
• Megophrys lekaguli differs from M. aceras, M. longipes, and M. nasuta by lacking a distinct palpebral projection (present in aceras, longipes, and nasuta).
Megophrys lekaguli differs from M. jingdongensis by having toes with only a rudiment of webbing (toe webbing well developed in jingdongensis) and lacking subarticular tubercles on Fingers I and II (present in jingdongensis).
• Megophrys lekaguli most closely resembles M. auralensis and M. major.
• Megophrys lekaguli differs from M. auralensis by having teeth on vomerine ridges (no teeth on vomerine ridges in auralensis), having males with SVL 56.6–66.6 (males with SVL 71.0–76.9 in auralensis), lacking dermal fringes on toes (present in auralensis), and having Finger II longer than Finger IV (Finger II shorter than Finger IV in auralensis).
• Megophrys lekaguli differs from M. major by lacking dermal fringes on toes (present in major); lacking a light-colored upper lip stripe (present in major); having the narrow, external, vertical face of the upper eyelid dark brown with a light area in its center (uniformly dark brown in major); and having a single row of weakly visible asperities on the underside of the lower jaw (well-developed broad band of asperities in major).



Figure 4 Lateral view of tadpole (fmnh 266341/thnhm 05391) of Megophrys lekaguli sp. nov. Scale bar = 5 mm.


Figure 5 Mouthparts of tadpole (fmnh 266341/thnhm 05391) of Megophrys lekaguli sp. nov. Scale bar = 1 mm.



Distribution and Ecology
Megophrys lekaguli is currently known from Chanthaburi and Sa Kaeo Provinces, Thailand (Fig. 1). Frogs were collected in Sa Kaeo at night (1815–2126 h) on boulders and rock outcrops above a swift, rocky stream with waterfalls in hilly evergreen mixed with bamboo forest and on leaf litter next to a large tree root network 20 m from a swift, rocky stream in disturbed vegetation next to an abandoned road through hilly evergreen forest. Tadpoles were collected at night (2000–2015 h) swimming at the water surface in a 3-m-wide swift, rocky stream in hilly evergreen mixed with bamboo forest and in a shallow stream pool with silt substrate in disturbed vegetation next to an abandoned road through hilly evergreen forest. All five of the Sa Kaeo adult males were calling.

Remarks
The two species that most closely resemble the new species, M. auralensis and M. major, were placed in the genus Xenophrys Günther, 1864 by Khonsue and Thirakhupt (2001; M. major as M. lateralis) and Frost (2004) without supporting argument. Frost et al. (2006) argued for recognition of Xenophrys because their phylogenetic analysis recovered Megophrys as more closely related to Ophryophryne than to Xenophrys. However, their analysis was based only on a single species of Megophrys and Xenophrys, and we feel that this issue remains unresolved. We therefore leave the new species in the genus Megophrys, pending a phylogenetic analysis with improved taxonomic sampling.



Figure 1 Map of localities referred to in the text. 1 = Phu Luang Wildlife Sanctuary; 2 = Phu Kradueng National Park; 3 = Phu Sri Tan Wildlife Sanctuary; 4 = Phu Pha Namtip Non-hunting Area; 5 = Phu Jong-Na Yoi National Park; 6 = Pang Si Da National Park; 7 = Khao Soi Dao Wildlife Sanctuary. Fieldwork was conducted at localities 1, 5, and 6 in this study.


References
Stuart, B. L., Y. Chuaynkern, T. Chan-ard & R.F. Inger. 2006: Three species of frogs and a new tadpole from eastern Thailand. Fieldiana. Zoology. New Series, 1543: 1-10.: doi: 10.3158/0015-0754(2006)187[1:TNSOFA]2.0.CO;2



ตามล่ามังกรแห่งบูรพา ภาค 2: http://siamensis.org/webboard/topic/6858
นิ้วยาวอะไรครับ: http://siamensis.org/webboard/topic/6829