| Main Ref. | Bertaco, V.A. and L.R. Malabarba, 2013 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | always different morphology between mature adults |
| Different colors | |
| Remarks | Specimens smaller than 41.0 mm SL possess two black vertically elongate humeral spots, first spot diffuse and second spot more conspicuous. Males have bony hooks on branched rays of anal and pelvic fins. Anal-fin rays of sexually mature males bear one pair of small, elongate, retrorse bony hooks whereas pelvic fin of males usually bearing one retrorse bony hook. Anal-fin profile nearly straight along most of its ventral border in males (vs. nearly straight in all its extension in females). Males and females also differ in proportions of the pectoral- and pelvic-fin lengths and caudal peduncle depth. Procurrent caudal-fin rays more developed in males (Ref. 94715). |
| Striking features | |
| Body shape lateral | |
| Cross section | |
| Dorsal head profile | clearly concave |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | superior |
| Type of scales | cycloid scales |
| Diagnosis |
This species is distinguished from its congener Hollandichthys multifasciatus by having the following characters: a small, vertically expanded black spot present at base of median caudal-fin rays, clearly visible after fixation in formalin or alcohol (vs. black spot present on caudal fin; distinctive marks on adipose fin absent (vs. anterior portion of adipose fin black); humeral spot absent on specimens larger than 60.0 mm SL (vs. humeral spot always present; two black humeral spots present on small specimens of both species). Additional characters useful to diagnose H. taramandahy from H. multifasciatus include having 8-11 dorsal procurrent caudal-fin rays (vs. 10-15), 7-8 ventral procurrent caudal-fin rays (9-12), and shorter length of the penultimate branched anal-fin ray in adult males 9.0-12.3 in SL (vs. 11.1-20.8 in SL) (Ref. 94715). Description: Dorsal-fin rays ii,9; anal-fin rays iii-v,27-30; pectoral-fin rays i,11-14; pelvic-fin rays 6,i; scale rows between lateral line and pelvic-fin origin 5-6 (Ref. 94715). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | 6 - 9 |
| Scales in lateral series | 37 - 40 |
| Scale rows above lateral line | 6 - 7 |
| Scale rows below lateral line | |
| Scales around caudal peduncle | 14 - 16 |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | 10 - 11 |
| on upper limb | 7 - 7 |
| total | |
| Vertebrae | |
| preanal | 16 - 18 |
| total | 36 - 39 |
| Attributes | no striking attributes |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 11 - 11 |
| Adipose fin | present |
| Attributes | forked |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes more or less normal |
| Spines | |
| Soft-rays 12 - 15 | |
| Pelvics | Attributes more or less normal |
| Position abdominal before origin of D1 | |
| Spines | |
| Soft-rays 7 - 7 |