Quasipaa exilispinosa ( Liu & Hu, 1975 )

Quasipaa exilispinosa ( Liu & Hu, 1975) View in CoL

Figs 2 View Figure 2 , 5 A, B View Figure 5 , Table 1 View Table 1

Specimen examined.

CIB T 1024 (Stage 25, field voucher WT 01) and CIB T 1025 (Stage 37, field voucher WT 08), collected on 26 July 2023 from Dazhulan , Guadun, Wuyishan, Fujian Province, China .

External morphology.

Based on the specimen CIB T 1024 , stage 25, TTL 46.6 mm, BL 14.7 mm. In lateral view, the body is oval, and the snout is blunt; dorsally, the snout is rounded, the head is slightly wider than trunk, BW / BH 135 %; the eyes are moderate in size, positioned and directed dorsolaterally, not visible from ventral view, ED / BL 11 %; the pupils are round; nares positioned and directed anterolaterally, closer to snout than to eye RND / NPD 82 %, NND / PPD 60 %; the rim of nares not raised from the body wall; the spiracle is single, sinistral, and short; the opening of spiracle oriented posterodorsally, free from the body wall at the tip, and closer to the tip of snout than to the anal tube opening SS / BL 52 %; the tail muscle is strong, gradually tapering until reaching the tail tip, TMH / BH 72 %, TMH / MTH 57 %; the tail fins are moderate in size, UFH / MTH 39 %, LFH / MTH 24 %, MTH / BH 126 %; the upper fin arises at the body-tail junction, SUD / BL 93 %; the lower fin is connected to the trunk; the tail tip is rounded; the anal tube is approximately conical in shape, medial, and entirely attached to lower fin, opening on lateral right side, posteriorly directed; the oral disc is positioned and directed anteroventrally, emarginated, elliptical with a median notch on the lower labium, ODW / BL 26 %, ODW / BW 43 %; a row of papillae on upper labium, with a large papilla gap, DG / ODW 37 %; two entire rows of papillae on lower labium, the inner row is distinctly larger; KRF 1: 4 + 4 / 1 + 1: 2; the 1 st – 3 rd tooth rows on upper labium are subequal, the inner 4 th – 5 th rows gradually shortened; the 1 st – 3 rd tooth rows on lower labium gradually shortened; the jaw sheaths are keratinized with fine serrations; the upper sheath is thin, covers the lower jaw, and the lower sheath is wide.

In life, the body is dark brown laterally; the tail muscle is light brown scattered with dark spots on upper edge and smaller spots on lower parts; tail fin with sparse dark pigmentation; dorsally, the body and tail are brown, and the trunk is darker; the lateral lines are goldish and clearly visible; the iris is bronze, and the pupil is black; ventrally, the body and tail is semi-translucent; the chest is pink; the abdomen is scattered with dense goldish speckles, the gut coil is clearly visible; the anal tube is covered by goldish pigments; the lower tail fin and bottom of tail muscle are scattered with sparse golden pigments; the mouth part is surrounded by goldish chromocytes.