Table 3.
Comparison of traits between Oreonectes daqikongensis sp. n. and the similarity species of Oreonectes.
| Trait | Oreonectes daqikongensis sp. n. | Oreonectes acridorsalis | Oreonectes barbatus | Oreonectes elongatus | Oreonectes translucens |
|---|---|---|---|---|---|
| No. | 15 | 5 | 8 | 3 | 3 |
| Locality of collection | Daqikong area, Libo County, Guizhou | Tian’e County, Guangxi | Nandan County, Guangxi | Huangjiang County, Guangxi | Duan County Guangxi |
| Dorsal fin rays | iii, 8–9 | iii, 7 | iii, 8–10 | iii, 8–9 | iii, 8 |
| Anal fin rays | iii, 6 | iii, 5 | ii, 5–6 | ii, 6–7 | iii, 6 |
| Pectoral fin rays | i, 11–12 | i, 10–12 | i, 10–12 | i, 10 | i, 11 |
| Pelvic fin rays | i, 6–7 | i, 5–6 | i, 6 | i, 6 | i, 6 |
| Caudal fin branched rays | 13–14 | 13–14 | 14 | 14 | 16 |
| Pectoral fin rays | Pectoral fin extend to or beyond the origin of the ventral fins | Pectoral fin Fan-shaped, extend to half of the distance between origins of pectoral fin and ventral fin | Pectoral fin extend to approx. two thirds of the distance between origins of pectoral fin and ventral fin | Pectoral fin long and narrow, greater than 1/2 the distance between origins of pectoral and pelvic fins |
Pectoral fin long and narrow, almost reaching pelvic-fin origin |
| Pelvic fin rays | The first and second branched rays of ventral fin are long, but do not form a spiny shape | Pelvic fin is shorter, origin is ahead of dorsal fin origin, extend, but cannot reach anus | Pelvic fin Origin is opposite to the dorsal fin origin, extend but cannot reach the anus | Pelvic fin relatively slender, extending slightly over anus | Pelvic fin extending slightly beyond anus. |
| Anal fin rays | Anal fin extend to reach half between the anal fin base and caudal fin base | Anal fin truncated outer edge | Anal fin truncated or slightly convex outer edge | Anal fin origin next to anus, tip nearly reaching middle of caudal peduncle | Anal-fin origin just posterior to anus |
| Lateral line | Lateral line is subcutaneously buried completely, which in the head has three branches | No lateral line in the body, lateral line in the head is not well-developed | No lateral line in the body, lateral line in the head is not well-developed | Lateral line incomplete, with 4 pores behind opercle, connecting to the cephalic lateral-line system. | Lateral line incomplete, with only 3 or 4 lateral pores behind head. |
| Eyes | Absent | Absent | Absent | Absent | Absent |