Schizopygopsis chengi baoxingensis Fang, Ding et Ye, 1994

Tian, Fei, Liu, Sijia, Chen, Shengxue & Zhao, Kai, 2025, Revision of Schizopygopsis chengi Fang 1936 (Cypriniformes: Cyprinidae), with a description of a new subspecies, Zootaxa 5590 (4), pp. 481-506 : 496-498

Schizopygopsis chengi baoxingensis Fang, Ding et Ye, 1994 ( Fig. 8 , Tables 3 and 8)

Schizopygopsis malacanthus baoxingensis (Fu, Ding and Ye), 1994 , The Fishes of Sichuan, 399–401 (The Baoxing River).

Materials examined

NWIPB 231201–17 (17), collected. 45–54 mm SL. collected in Western China: Sichuan Province: Baoxing County; 102.81E, 30.38N.

Diagnosis

Schizopygopsis chengi baoxingensis is distinguished from S. c. chengi and S. c. duokeheensis by having fewer outside and insider gill rakers on the first gill arch. The numbers of outside and insider gill rakers ranged from 10–15 and 16–23 in S. c. baoxingensis, from 15–20 and 25–37 in S. s. chengi , and from 17–21 and 27–36 in S. c. duokeheensis. The oral fissure is slightly hooked in S. c. baoxingensis, and nearly transverse in S. c. chengi and S. c. duokeheensis.

Description

D. iii, 8; P. i, 17–20; V. i, 9–10; A. iii, 5; vertebrae 4 + 44–46.

The morphometric measurements are shown in Table 7.

Body elongate, slightly flat. Greatest depth at origin of dorsal fin, dorsal profile arched, ventral profile curved. Snout obtuse and round. Lip narrow with two lateral lobes, posterior groove of the lower lip discontinued. Mouth inferior, oral fissure slightly hooked, and the lower jaw sharp with a strong and flat horny layer. No barbels. Eye big, round, forward in the middle of the head. Gill rakers long and sparse, outer gill rakers small. Pharyngeal teeth in 2 rows, 4.3/3.4; hooked, pointed at the tip and with a concave grinding surface. Body entirely naked with 1–4 rows of scales above the pectoral axil. Lateral line complete, along middle of flank and caudal peduncle, anterior portion skinfold-like. The last unbranched dorsal fin ray weak with small serratures at the posterior edge. The origin of the dorsal fin closer to the tip of the snout than to the base of the caudal fin. Commencement of the ventral fin under the 4 th branched ray of the dorsal fin. The anterior angle of dorsal fin round and posterior angle squarish. Anal sneath consisting of enlarged scales on each side, and the anal sneath reaching or slightly exceeds the midpoint between the ventral and anal fins. Caudal deeply forked, the lower lobe slightly longer than the upper one.

Color pattern

The back yellowish brown to blackish brown, the abdomen greyish white, without black dots or spots on the body, the dorsal, ventral and anal fins yellow, and the caudal fin light pink in the living specimen.

Distribution and habitats

Schizopygopsis chengi baoxingensis is distributed in the headstreams of Qingyijiang River, the Baoxing River in Baoxing County, Sichuan Province, China ( Fig. 9 ).

Schizopygopsis chengi baoxingensis inhabits cold highland streams with a substrate of pebbles and gravels at altitudes of 1500- 2000 m above sea level. It mainly feeds on plant fragments and algae.

Etymology

The name of the subspecies, baoxingensis, is derived from the Baoxing River (ĪẊñ), where the holotype was collected. The Chinese name for this species is suggested as 大ăẹṳaeḛĪẊ亚ª.

Figures

FIGURE 8. Holotype of S. c. baoxingensis. a. The lateral view of holotype S. c. baoxingensis. b. The dorsal view of holotype S. c. baoxingensis. c. The ventral view of holotype S. c. baoxingensis. d. The morphology of anal fin in holotype S. c. baoxingensis. The inner (e) and outer (f) side gill arch from left side of S. c. baoxingensis.

FIGURE 9. The habit of S. c. baoxingensis in the Baoxing River.