Crossocheilogobio, Sun & Tang & Zhao, 2025
|
publication ID |
https://doi.org/10.3897/zse.101.160106 |
|
publication LSID |
lsid:zoobank.org:pub:8EA19722-8036-4468-BDE1-DFF41BE9CE7A |
|
DOI |
https://doi.org/10.5281/zenodo.17371569 |
|
persistent identifier |
https://treatment.plazi.org/id/61412E2A-90F5-5ACD-BF77-1F5A23FBE182 |
|
treatment provided by |
|
|
scientific name |
Crossocheilogobio |
| status |
gen. nov. |
Crossocheilogobio gen. nov.
Fig. 12 View Figure 12
Type species.
Pseudogobio tafangensis Wang, 1935 .
Diagnosis.
The new genus can be distinguished from all other genera within the Pseudogobionini by the combination of the following characters: (1) mouth horseshoe-shaped and inferior, forming a sucking-disc structure; (2) central portion of the anterior papillae two, semi-covered by rostral cap; (3) lateral portion of the anterior papillae on upper lip fringed, in several rows; (4) lower lip in three burred lobes, without anterior fold; (5) lateral lobes on lower lip not in contact with each other posteriorly from medial pad; (6) medial lobe possessing two elongated thin protrusions; (7) upper jaw extremely narrow, the horny margin width approximately quarter of mouth width; (8) jaws covered by the thick lips; (9) barbel in one pair; (10) midventral region of body usually scaleless before pectoral-fin base end; (11) pharyngeal teeth in one row; (12) anterior chamber of the air bladder enclosed in fibrous capsule; (13) posterior chamber relatively small, length smaller than half eye diameter, thin.
Description.
Body elongated, abdomen rounded; caudal peduncle short, compressed laterally. Mouth horseshoe-shaped and inferior, forming a sucking-disc structure; barbel one pair; lips very thick, with well-developed papillae; central portion of the anterior papillae two, semi-covered by rostral cap, lateral portion of the anterior papillae on upper lip fringed, in several rows; lower lip in three burred lobes, without anterior fold; two lateral lobes on lower lip not in contact with each other posteriorly from medial pad, laterally connected with upper lip anterior papillae around mouth corners; medial lobe possessing two elongated thin protrusions. Jaws with horny sheathed edge; upper jaw extremely narrow, horny margin width approximately quarter of mouth width; jaws covered by the thick lips (Fig. 3 G View Figure 3 ). Body covered with moderately large cycloid scales. Thoracic region scaleless, mid-ventral region covered with scales. Anus positioned in anterior one-third of pelvic-fin insertion and anal-fin base. Lateral line complete, almost straight. Lateral-line scales usually 35–38; scales above lateral line 3.5–4; scales below lateral line usually 2–3; predorsal scales 8–10; circumpeduncular scales 12. Distal margin of expanded dorsal fin convex, especially significant in adult male, with three unbranched and seven branched rays, pectoral fin with one unbranched and 10–13 branched rays, pelvic fin usually with one unbranched and seven branched rays, anal fin with three unbranched and five branched rays; caudal fin forked, with one simple ray and nine branched rays on upper lobe and eight branched rays and one simple ray on lower lobe, lobes blunt. Pharyngeal teeth “ 5–5 ” in one row. Air bladder relatively small, possessing two chambers; anterior chamber rounded, enclosed in a thick fibrous capsule; posterior chamber small, length shorter than anterior chamber length, less than half eye diameter, thin. Intestine very long.
Distribution.
This genus has a relatively narrow distribution. It is currently known to be distributed in the Qiantangjiang River and Cao’ejiang River basins. This genus is endemic to China (Fig. 5 F View Figure 5 ).
Etymology.
The prefix “ crosso- ” was derived from the Greek word “ krossoi ”, meaning tassel; “ cheilo- ” from the Greek word “ cheilos ”, meaning lip. The generic name refers to the fringed papillae on the upper lips of the species in this genus. The suggested Chinese name for this genus is “ 穗唇鮈 ” 属, and the Chinese Pinyin name is “ Suì Chún Jū ” Shǔ.
Species included.
Crossocheilogobio tafangensis (Wang, 1935) , comb. nov. (type species).
Remarks.
The new genus Crossocheilogobio can be distinguished from the genus Biwia by having barbels (vs. no barbels), reduced air bladder (vs. enlarged) and well-developed lip papillae (vs. thin and simple). It can be distinguished from the genera Microphysogobio and Huigobio by having an extremely narrow upper jaw horny margin, usually quarter mouth width (vs. wide, larger than half mouth width). This new genus is more similar to Platysmacheilus in general because their lobes on lower lips are not well separated or even fused. However, the genus Crossocheilogobio can be distinguished from Platysmacheilus by having central portion of anterior papillae on upper lip in one row (vs. several rows) and a double-lobed medial pad (vs. no obvious medial pad).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.