Common names from other countries
>
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).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Tầng nổi. Tropical
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).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.2 cm SL con đực/không giới tính; (Ref. 96084)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng) : 0; Các vây lưng mềm (tổng cộng) : 11 - 14; Tia cứng vây hậu môn: 0; Tia mềm vây hậu môn: 13 - 15; Động vật có xương sống: 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).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
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)
IUCN Red List Status (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
Threat to humans
Harmless
Human uses
Các công cụ
Special reports
Download XML
Các nguồn internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [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).
Mức dinh dưỡng (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
