Glyptothorax schmidti

Glyptothorax platypogonides (non Bleeker, 1855) — Hashim et al., 2012: 29. Glyptothorax laosensis (non Fowler) — Fowler, 1939: 57; Kano et al., 2013: 179; Miyazaki et al., 2013: 1041, Fig. 3 D.

Sumber: The Glyptothorax of Sundaland: a revisionary study (Teleostei: Sisoridae)

MYANMAR: ZRC 22935 (1), 108.8 mm SL; Tanintharyi Region: Tanintharyi River, Tuler Kloh. CMK 24876 (3), 33.8 – 34.4 mm SL; Thanintharyi Region: Tanintharyi River downstream of Myittar town; 14 ° 11 ' 14 " N 98 ° 33 ' 5 " E. CMK 24900 (4), 39.1 – 51.5 mm SL; Thanintharyi Region: Chaung Gyi (stream) tributary Khamaungthawe near upper Seikphyone village; 14 ° 20 ' 6 " N 98 ° 26 ' 7 " E. CMK 24976, (6), 40.9 – 84.7 mm SL; Thanintharyi Region: Kamate Chaung, east of Myaekanbaw; 14 ° 20 ' 7 " N 98 ° 31 ' 4 " E. CMK 24999 (21), 42.3 – 84.1 mm SL; Thanintharyi Region: Kamate Chaung, east of Myaekanbaw; 14 ° 20 ' 52 " N 98 ° 31 ' 28 " E.

Sumber: The Glyptothorax of Sundaland: a revisionary study (Teleostei: Sisoridae)

Distribution. Glyptothorax schmidti is known from river drainages in northern Sumatra (Deli River and neighboring drainages) and the Malay Peninsula, on the west coast from Tenasserim River southwards to Klang River drainages and on the east coast from Tha Di River southwards to Pahang River drainages (Fig. 36). Comparisons. Besides G. famelicus and G. ketambe (already compared with G. schmidti in the diagnosis) and which share the prominent pale mid-dorsal and midlateral stripes, there are six other congeners known from the Malay Peninsula and Sumatra: G. amnestus, G. f u s c u s, G. keluk, G. platypogonides, G. prashadi and G. plectilis. Glyptothorax schmidti further differs from all of these five species in having a longer dorsal-to-adipose distance (23.9 – 28.1 % SL vs. 14.8 – 23.6), from G. amnestus in lacking (vs. having) anteromedial striae in the thoracic adhesive apparatus, a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.3 – 20.6) and a more slender caudal peduncle (depth 5.8 – 8.7 % SL vs. 9.8 – 11.2), from G. f u s c u s in having a concave (vs. straight) margin of the dorsal fin and a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.6 – 20.7), and from G. k el u k in having a shorter dorsal-fin spine (8.9 – 14.9 % SL vs. 16.0 – 20.1), a straight (vs. convex) dorsoposterior margin of the adipose fin and a longer post-adipose distance (18.9 – 22.0 % SL vs. 15.2 – 16.7). It is further distinguished from G. platypogonides in having a smaller eye (5 – 10 % HL vs. 11 – 14), shorter dorsal-fin spine (8.9 – 14.9 % SL vs. 15.6 – 19.3), from G. plectilis in lacking (vs. having) anteromedial striae in the thoracic adhesive apparatus and having a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.3 – 18.8) and caudal peduncle (depth 5.8 – 8.7 % SL vs. 8.4 – 10.6), and a longer post-adipose distance (18.9 – 22.0 % SL vs. 14.0 – 17.6), and from G. prashadi in having a narrower head (16.7 – 20.4 % SL vs. 20.2 – 22.8), a shorter dorsal-fin spine (8.9 – 14.9 % SL vs. 14.2 – 17.3), a concave (vs. straight) margin of the dorsal fin, a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.8 – 18.8) and a more slender caudal peduncle (5.8 – 8.7 % SL vs. 8.3 – 10.3). Among the remaining Sundaic congeners, G. schmidti further differs from G. decussatus in lacking (vs. having) anteromedial striae in the thoracic adhesive apparatus, a shorter dorsal-fin spine (8.9 – 14.9 % SL vs. 16.0 – 17.3), a longer dorsal-to-adipose distance (23.9 – 28.1 % SL vs. 18.6 - 21.2), a longer post-adipose distance (18.9 – 22.0 % SL vs. 16.2 – 17.5), and a more slender caudal peduncle (depth 5.8 – 8.7 % SL vs. 10.3 – 10.9), from G. exodon in having the premaxillary tooth band approximately half (vs. almost entirely) exposed when the mouth is closed and a smaller eye (diameter 5 – 10 % HL vs. 10 – 13), and from G. major in lacking (vs. having) anteromedial striae in the thoracic adhesive apparatus, a shorter predorsal length (31.6 – 36.9 % SL vs. 36.7 – 41.6), a longer and more slender caudal peduncle (depth 2.2 – 3.0 times in its length vs. 1.6 – 2.2). It is further distinguished from G. nieuwenhuisi in having a longer dorsal-to-adipose distance (23.9 – 28.1 % SL vs. 16.7 – 21.7), from G. pictus in having a shorter dorsal-fin spine (8.9 – 14.9 % SL vs. 15.4 – 20.9), a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.4 – 20.2) and caudal peduncle (depth 5.8 – 8.7 % SL vs. 8.4 – 10.9), and from G. platypogon in having a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.4 – 19.0), a straight (vs. convex) dorsoposterior margin of the adipose fin, a longer post-adipose distance (18.9 – 22.0 % SL vs. 14.6 – 17.6) and caudal peduncle (18.7 – 21.4 % SL vs. 15.5 – 18.2). Glyptothorax schmidti further differs from G. robustus in having (vs. lacking) a medial pit in the thoracic adhesive apparatus, a shorter predorsal length (31.6 – 36.9 % SL vs. 36.7 – 40.0) and a longer dorsal-to-adipose distance (23.9 – 28.1 % SL vs. 16.9 – 20.4), and from G. stibaros in having a shorter predorsal distance (31.6 – 36.9 % SL vs. 39.1 – 42.8), a smooth (vs. serrated) posterior margin of the dorsal-fin spine, shorter dorsal- (8.9 – 14.9 % SL vs. 15.9 – 20.4) and pectoral-fin spines (14.0 – 18.3 % SL vs. 18.1 – 22.2), a shorter adipose-fin base (10.1 – 14.9 % SL vs. 14.6 – 17.8), longer dorsal-to-adipose (23.9 – 28.1 % SL vs. 15.1 – 21.3) and post-adipose (18.9 – 22.0 % SL vs. 15.7 – 18.3) distances, and a more slender body (depth at anus 11.4 – 15.7 % SL vs. 15.6 – 20.6). Given that Glyptothorax species from the Malay Peninsula are also known to occur in the rivers draining the southern face of the Cardamom Mountains (in southeastern Thailand and presumably southwestern Cambodia), it is necessary to compare G. schmidti with G. coracinus, a species known from the short coastal drainages draining the western face of the Krâvanh (Cardamom) Mountains and Dâmrei (Elephant) Mountains in southwest Cambodia that is very similar in overall morphology and color pattern. Although Ng & Rainboth (2008) distinguished G. coracinus from G. schmidti (as G. siamensis) in having a smaller eye (6 – 7 % HL vs. 8 – 11), the results of our study indicate that the eye diameter of the two species overlap completely (5 – 10 % HL for G. schmidti vs. 6 – 7 for G. coracinus). However, G. coracinus lacks anastomosing striae on the thoracic adhesive apparatus (vs. anastomising striae present), and has both a less tapering body than G. schmidti (caudal peduncle depth 1.7 times in body depth at anus vs. 1.8 – 2.4) as well as darker dorsal, pectoral, pelvic and caudal fins due to the presence of brown pigmentation on almost the entire dorsal surfaces of these fins (vs. pigmentation absent or only partially present on some fin rays); it is on the basis of these characters that we regard the two species as distinct.

Sumber: The Glyptothorax of Sundaland: a revisionary study (Teleostei: Sisoridae)

Distribution: Sumatra (H. H. Ng, Pers. Comm. 2005). We have examined specimens from Sumatra.

Sumber: Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes).