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No image available for this species; drawing shows typical species in Distichodontidae.
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Nannocharax:Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); hastatus:The adjectival species name hastatus, from the Latin 'hasta', meaning spear, is an allusion to the spearshaped body of the species (Ref. 96084).
Africa: Likouala drainage in Republic of Congo (Ref. 96084) and Pool Malebo and Middle Congo River, including Luilaka River and Tshuapa River, in Democratic Republic of the Congo (Ref. 96084).
大小 / 重量 / 年龄
成熟度: Lm? range ? - ? cm Max length : 3.2 cm SL 雄鱼/尚未辨别雌雄; (Ref. 96084)
背棘 (总数) : 0; 背的软条 (总数) : 11 - 14; 臀棘: 0; 臀鳍软条: 13 - 15; 脊椎骨: 40 - 42. Diagnosis: Nannocharax hastatus is distinguished from all congeners except N. maculicauda and N. ocellicauda by the possession of a largely unpigmented body except for a dark line along the bases of the dorsal and anal fins and a longitudinally elongate, ovoid, dark spot on the posterior portion of the caudal peduncle and bases of the central caudal-fin rays; the elongate form of the head and body are also unique to these three species in the genus (Ref. 96084). Nannocharax hastatus differs from N. maculicauda in the numbers of scale rows around the caudal peduncle, 18-20 vs. 14-16; and pored scales along the lateral line, 6-9 vs. 55-61 (Ref. 96084). Nannocharax hastatus is distinguished from N. ocellicauda in the number of scales along the lateral-line scale series, 59-68 vs. 50-56; and scale rows around the caudal peduncle, 18-20 vs. 13-16 (Ref. 96084).
Jerep, F.C. and R.P. Vari, 2014. New species of Nannocharax (Characiformes: Distichontidae) from the Northwestern Congo River Basin, with appraisal of Hemigrammocharax. Copeia 2014(1):44-49. (Ref. 96084)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
系统发育多样性指数 (参考文献 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00186 - 0.01072), b=3.17 (2.97 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
营养阶层 (参考文献 69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
渔业脆弱性 (Ref. 59153): Low vulnerability (10 of 100). 🛈
