Main Ref. | Delapieve, M.L.S., P.A. Lehmann and R.E. Reis, 2017 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | |
Different colors | |
Remarks | Males possess a small urogenital papilla behind the anal tube. A single mature male has a pelvic-fin contact organ, composed of a row of slightly enlarged odontodes on the dorsal surface of the first pelvic-fin branched rays. |
Striking features | |
Body shape lateral | elongated |
Cross section | |
Dorsal head profile | |
Type of eyes | |
Type of mouth/snout | |
Position of mouth | |
Type of scales | |
Diagnosis |
Nannoxyropsis acicula can be diagnosed from its congener N. ephippia by the absence of preopercle latero-sensory canal (vs. presence of sensory canal); and by enlarged odontodes on posterior margin of the parieto-supraoccipital, forming crest (vs. odontodes not enlarged or forming crest). It further differs from N. ephippia by having a longer head (34.8-39.4 vs. 29.4-33.5% SL), a narrower snout (width of snout measured at widest point of mouth opening (37.0-40.7 vs. 43.1-45.3% HL), a larger predorsal length (44.7-48.9 vs. 40.1-44.5% SL), a smaller dorsal interorbital distance (37.1-42.4 vs. 43.0-54.2% HL), 20-22 plates in median series of lateral plates (vs. 23), and 11-17 teeth on premaxilla (vs. 18-26) (Ref. 116855). |
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 | no striking attributes |
Fins number | 1 |
Finlets No. | Dorsal |
Ventral | |
Spines total | 1 - 1 |
Soft-rays total | 7 - 7 |
Adipose fin | absent |
Attributes | forked |
Fins number | |
Spines total | |
Soft-rays total | 6 - 6 |
Pectoral | Attributes |
Spines 1 | |
Soft-rays 6 - 6 | |
Pelvics | Attributes |
Position abdominal before origin of D1 | |
Spines | |
Soft-rays 6 - 6 |