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Rhabdolichops nigrimans Correa, Crampton & Albert, 2006

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drawing shows typical species in Sternopygidae.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Gymnotiformes (Knifefishes) > Sternopygidae (Glass knifefishes)
Etymology: Rhabdolichops: Greek, rhabdos = stick + Greek, dolichos = long (Ref. 45335);  nigrimans: Name from the Latin noun 'manus', meaning hand, and 'nigrum' for black, referring to the diagnostic black pectoral fin..

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 底中水层性; 深度上下限 5 - 15 m (Ref. 55969).

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

South America: Brazil.

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 43.1 cm TL 雄鱼/尚未辨别雌雄; (Ref. 55969); 30.5 cm TL (female)

简单描述 检索表 | 型态特徵 | 形态测量图

Diagnosis: Distinguished from its congeners by the following characters: presence of black pectoral and anal fins, with dark chromatophores extending to the distal tips of the fin rays, and from all congeners (except R. lundbergi) by long pectoral fins (P1/HL = 127.7 ±13.4 vs. 60-100); except with R. lundbergi, the anterodorsal margin of the opercle forms a sharp right (vs. sloping obtuse) angle; except R. lundbergi, it has a sickleshaped maxilla with concave dorsal margin (vs. broad maxilla with straight dorsal margin); infraorbital canal bones five and six ossified as complete slender tubes (vs. broad partial cylinders with bony arches); sphenotic spine ventral to infraorbital portion on frontal (vs. posterior to infraorbital portion on frontal); posttemporal fossa absent (vs. present); opercle with anterodorsal facet; cleithral process narrow (vs. broad); cleithrum with a semi-lunar margin against the base of the pectoral-fin radials, a long pectoral-fin (longer than head length vs. shorter); displaced hemal spines 3-4 (vs. 2); and pectoral-fin with black chromatophores on rays (vs. hyaline rays). Rhabdolichops nigrimans can further be distinguished from R. lundbergi by having: a longer body (maximum total length 419 vs. 233 mm TL; n = 15 for each species); an exaggeratedly scaly appearance of anterior epaxial body surface due to chromatophores concentrated along outer scale margins; larger teeth on premaxilla, mesopterygoid and dentary; and more numerous teeth on premaxilla (20-25 vs. 18-20), mesopterygoid (11-13 vs. 8), and dentary (25-34 vs. 12-13; n = 2 adults for each species); and sexual dimorphism of the caudal appendage (tail) length in which mature males possess a longer caudal appendage than mature females (mean CA 44 ± 2.9% vs. 38 ± 3.2%; n = 5 each) (Ref. 55969).

生物学特性     字汇 (例如 epibenthic)


Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼


主要参考文献 Upload your references | 参考文献 | 合作者 : Albert, James S. | 合作者

Correa, S.B., W.G.R. Crampton and J.S. Albert, 2006. Three new species of the neotropical electric fish Rhabdolichops (Gymnotiformes: Sternopygidae) from the central Amazon, with a new diagnosis of the genus. Copeia 2006(1):27-42. (Ref. 55969)

世界自然保护联盟红皮书 (Ref. 130435)

  最不相关 (LC) ; Date assessed: 03 December 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

 





人类利用

FAO - Publication: search | FishSource |

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Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
营养阶层 (Ref. 69278):  3.2   ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (33 of 100).