Devario fangae

description

Description. Based on specimens in measurement series, with notes on variation. Largest female 61.0 mm SL, largest male 58.8 mm SL. Measurements are presented in Tables 1 – 2. Counts for holotype are marked with an asterisk. Body laterally compressed, elongate. Females deeper, prepelvic and preanal distances greater, than in males (Fig. 3, Table 2). Predorsal contour straight or slightly curved, ascending, with slight indentation marking position of lateralis canal of temporal commissure; sloping posteriorly from dorsal-fin insertion. Prepelvic contour curved, more so in females; chest compressed below pectoral fin, but not keeled. Snout short, rounded in dorsal aspect, subtriangular in lateral aspect, about as long as eye diameter in lateral aspect, relatively shorter in juveniles. Infraorbital process laminar, about twice as broad as high, with truncate or slightly concave distal margin. Danionine notch caudally margined by blunt anteromediad projecting laminar dentary process. Skin cover absent from distal part of infraorbital process, dentary process, and anterior margin of supraorbital. Mouth terminal, obliquely directed upwards. Small knob at dentary symphysis, fitting in dep

Devario fangae and Devario myitkyinae, two new species of danionin cyprinids from northern Myanmar (Teleostei: Cyprinidae: Danioninae)

diagnosis

Diagnosis. Devario fangae shares uniquely with D. browni and D. kakhienensis an anterior expansion in width of the P stripe. It differs from D. browni and D. kakhienensis in presence of a broad P stripe, wider than adjacent interstripes, vs. narrow, as wide as or narrower than interstripes. Devario fangae is further similar to species of Devario characterized by three dark stripes (P, P + 1, P- 1) along the side, but differs from these in having all three stripes wide and of similar width vs. P stripe wide and P + 1 and P- 1 stripes much narrower as in D. aequipinnatus, D. acrostomus, D. deruptotalea, D. fangfangae, D. fraseri, and D. gibber. In D. regina and D. malabaricus, the stripes are relatively wide but not wider than interspaces and the P stripe is split anteriorly by a short light interspace. The status and diagnoses of D. assamensis (Barman, 1984) from the Brahmaputra River in southern Assam, and D. ostreographus (M’Clelland, 1839), without locality, are uncertain, but both were described as extremely deep-bodied, and thus unlikely to be confused with D. fangae. From D. devario, D. fangae can be distinguished by presence vs. absence of infraorbital process and rostral bar

Devario fangae and Devario myitkyinae, two new species of danionin cyprinids from northern Myanmar (Teleostei: Cyprinidae: Danioninae)

etymology

Etymology. This species was singled out by the late Fang Fang (1962 – 2010) for description as new, including separation of the holotype, and it seems pertinent to attach her name to it as the proper discoverer, and also recognizing her deep personal interest in the freshwater fishes of Myanmar. A noun in the genitive case.

Devario fangae and Devario myitkyinae, two new species of danionin cyprinids from northern Myanmar (Teleostei: Cyprinidae: Danioninae)

materials_examined

Holotype. NRM 45659. Male, 47.9 mm SL; Myanmar, Kachin State, Putao, Ayeyarwaddy River drainage, Nan Hto Chaung, in Putao, ca. 1 mile from 46 th regiment, close to rice mill, 27 ° 19 ′ 44 ″ N 97 ° 22 ′ 36 ″ E; 27 Mar 1998. S. O. Kullander & R. Britz (SOK- 98 - 021 A). Paratypes. NRM 40918, 13, 43.0 – 61.0 mm SL; NRM 40919, 3, 36.5 – 55.7 mm SL; NRM 40930, 52, 10.9 – 18.9 mm SL; NRM 41677, 1, ca. 20 mm SL; NRM 41678, 1, 23.5 mm SL; NRM 69442, 30, 29 – 58.7 mm SL; NRM 69443, 9, 21.0 – 26.1 mm SL; NRM 69444, 15, 32.6 – 46.2 mm SL; NRM 69447, 10, 26.9 – 33.8 mm SL; Same data as holotype. — NRM 40942, 57, 11.9 – 25.4 mm SL; NRM 41274, 15, 12.6 – 18.3 mm SL; NRM 69439,11, 34.7 – 51.3 mm SL; NRM 69440, 31, 29.1 – 50.0 mm SL; NRM 69441, 25, 24.6 – 31.0 mm SL; Myanmar, Kachin State, Putao, Ayeyarwaddy River drainage, Ma Kyaww Wa Chaung and its tributary Nan Hto Chaung, in Putao, ca 1 mile from 46 th regiment, approximately 27 ° 19 ′ 44 ″ N 97 ° 22 ′ 36 ″ E; 28 Mar 1998, S. O. Kullander & R. Britz (SOK- 98 - 021 B).

Devario fangae and Devario myitkyinae, two new species of danionin cyprinids from northern Myanmar (Teleostei: Cyprinidae: Danioninae)