| Main Ref. | Chen, I.-S., Y.-H. Cheng and K.-T. Shao, 2008 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | other (see Diagnosis) |
| Body shape lateral (shape guide) | elongated |
| Cross section | circular |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | superior |
| Type of scales | |
| Diagnosis |
Rhinogobius longyanensis can be distinguished from all other species of Rhinogobius by the unique combination of the following characters: second dorsal fin rays I, 8; anal fin rays I, 7-8; pectoral fin rays modally 17; longitudinal scale rows 30-32; predorsal scales 7-8; and vertebral count 10 + 17 = 27; body with 5-6 blackish brown blotches; 3 parallel, deep brown oblique stripes crossing on cheek in male; branchiostegal membrane with 24-28 shiny orange red spots in male; pectoral fin base with a horizontal, deep black bar which is sharply pointed posteriorly (Ref. 79602). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin |
| Attributes |
| Fins number | 1 |
| Spines total | 1 - 1 |
| Soft-rays total | 7 - 8 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 17 - 17 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |