Pseudomystus carnosus

description

Description. Biometric data as in Table 2. Head depressed; dorsal profile slightly convex and ventral profile almost straight; snout broadly rounded when viewed dorsally. Bony elements of dorsal surface of head covered with thin skin; bones visible, especially on posterior half of neurocranium, and ornamented with numerous fine, radial grooves. Midline of cranium with fontanelle extending from behind snout to just beyond level of posterior orbital margin. Supraoccipital process moderately broad, with gently converging sides and blunt tip; extending to nuchal plate. Supratemporal with long posterior process, almost as long as cleithral process. Eye ovoid, horizontal axis longest, with free margin; located entirely in dorsal half of head. Gill openings wide, extending from post-temporal to beyond isthmus. Gill membranes free from isthmus, with 7 * (3) or 8 (1) branchiostegal rays. First branchial arch with 3 + 6 * (3) or 3 + 9 (1) gill rakers. Mouth subterminal. Oral teeth small and viliform, in irregular rows on all tooth-bearing surfaces. Premaxillary tooth band rounded, of equal width throughout. Dentary tooth band much narrower than premaxillary tooth band at symphysis, tapering

The identity of Pseudomystus moeschii (Boulenger, 1890), with the description of two new species of bagrid catfishes from Southeast Asia (Teleostei: Bagridae).

diagnosis

Diagnosis. Pseudomystus carnosus can be distinguished from congeners, except for P. fumosus and P. moeschii, in having an enlarged and prominent process of the post-temporal (the “ supraclavicular process ” of previous authors), which is almost as long as (vs. less than one third the length of) the post-cleithral process, the presence (vs. absence) of long hair-like epithelial projections on the skin and long tubular extensions of the sensory pores. Pseudomystus carnosus can be distinguished from P. fumosus and P. moeschii in having a pointed (vs. rounded) tip of the nuchal shield (Fig. 2). It further differs from P. fumosus in having less developed procurrent caudal rays that are evenly sloping along the anterior edges (vs. well developed procurrent caudal rays that curve sinuously along the edges; Fig. 3) and from P. moeschii in having a deeper body (13.0 - 16.7 % SL vs. 13.0 - 14.5) and lacking (vs. possessing) lighter colored patches on the body.

The identity of Pseudomystus moeschii (Boulenger, 1890), with the description of two new species of bagrid catfishes from Southeast Asia (Teleostei: Bagridae).

distribution

Distribution. Known from the Way Seputih River drainage in Lampung province, southern Sumatra (Fig. 4).

The identity of Pseudomystus moeschii (Boulenger, 1890), with the description of two new species of bagrid catfishes from Southeast Asia (Teleostei: Bagridae).

etymology

Etymology. From the Latin carnosus, meaning fleshy, in reference to the robust body of this species when compared to P. moeschii. Used as an adjective.

The identity of Pseudomystus moeschii (Boulenger, 1890), with the description of two new species of bagrid catfishes from Southeast Asia (Teleostei: Bagridae).