Classification / Names
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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Stevardiinae
Etymology: Varicharax: Named for Richard P. Vari, former curator of the Division of Fishes at USNM, for his inspiring career focused on studying Neotropical freshwater fishes and mentoring new generations of ichthyologists; plus 'charax' (typical genus of the Characiformes), from a Greek word (characo) meaning 'palisade of pointed sticks.'; nigrolineatus: Name from Latin. formed by 'nigro' meaning 'dark' and 'lineatus' for 'lined', referring to the dark mid-lateral stripe extending along the body, a distinctive feature.
Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल पिलाजिक. Tropical
South America: Peru.
आकार / वज़न / Age
परिपक्व अवधि: Lm ? range ? - ? cm
Max length : 3.6 cm SL पुल्लिंग / अलिंग; (Ref. 121996); 3.1 cm SL (female)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 8; ऐनल सौफट रेज़: 18 - 23; जानवरों की रीड़ का जोड़: 37 - 39. This species is distinguished by the following characters: horizontal process of anguloarticular broadly covered by dentary, reaching posterior border of Meckelian cartilage (161:0 > 1); maxillary teeth extending across almost entire maxillary lamella (191:0 > 1); no hemal prezygapophysis on anterior caudal vertebrae (333:0 > 1); ventral margin of post-temporal anterior to lateral margin of the epioccipital (335:1 > 0; also in data set B as 266:1 > 0); lateral lamella of pelvic bone reaching two thirds of this bone (373:0 > 1); mandibular accessory tendon longitudinally inserted on vertical through middle or anterior half of Meckelian cartilage (474:0 > 1); gill filaments not fused to form a gill gland in adult males (511:1 > 0); and from the data set B, anterior margin of nasal extending anterior to lateral process of mesethmoid (14:1 > 0); parietal branch of supratemporal canal extend over frontal or not reaching lateral surface of parietal bone (33:0 > 1); first and second postcleithra separated from each other by distance greater than three-quarters of third postcleithrum length (296:1 > 0); dorsal margin of third postcleithrum not reaching second-postcleithrum midpoint (298:1 > 0); ventralmost tendinous fiber of hypaxialis inserted on the lateral or ventral surface of caudal-fin ray 19 (367:1 > 0); no terminal lateral-line tube on caudal-fin membrane (374:1 > 0); no humeral mark (388:1 > 0); distance between bases of middle caudal-fin rays 10 and 11 approximately equal or less than that between rays 11 and 12 (433:1 > 0); anal-fin bony hooks not confined to anterior half of fin (460:1 > 0) but, instead, distributing over proximalmost segment of all or, most, fin rays (462:0 > 1; 465:0 > 1) (Ref. 121996).
Cross section: compressed.
Life cycle and mating behavior
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Vanegas‐Ríos, J.A., D.R. Faustino-Fuster, V. Meza-Vargas and H. Ortega, 2020. Phylogenetic relationships of a new genus and species of stevardiine fish (Characiformes: Characidae: Stevardiinae) from the Río Amazonas basin, Peru. J. Zool. Syst. Evol. Res. 58(1):387-407. (Ref. 121996)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (संदर्भ
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00635 - 0.03140), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (संदर्भ
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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