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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: Rivulus: Latin, rivus = stream (Ref. 45335); formosensis: The specific name formosensis alludes to the occurrence of the species in the Formoso river floodplains.
More on author: Costa.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
; air tawar bentopelagis; pH range: 5.6 - ?. Tropical
South America: Formoso river floodplains, upper Corrente river drainage of the upper Paraná river basin in Brazil.
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Max length : 3.3 cm SL jantan/; (Ref. 75995); 3.5 cm SL (female)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
duri punggung lunak (Keseluruhan (total)) : 10 - 11; Sirip dubur lunak: 13 - 15; vertebrata, bertulang belakang: 30. Diagnosed from all congeners by the presence of red marks on flank arranged in chevron-like pattern with a branching on the upper portion forming Y-shaped red marks in males. Additional characters not unique but useful to distinguish from all congeners when combined include: flank intense greenish blue, to purplish blue above anal-fin base in males; red marks on flank arranged in chevron-like pattern; sub-basal red stripe on the dorsal fin absent in males; absence of black reticulation on head in females; absence of orange pigmentation on caudal fin in females; 29-31 scales in the longitudinal series; frontal squamation E-patterned; 31-33 caudal-fin rays; pre-dorsal length 75.1-79.5% SL in males; and anal-fin base 20.6-23.0% SL in males; 18.2-20.0% SL in females (Ref. 75995).
Body shape (shape guide): elongated.
Inhabits open areas highly exposed to sunlight (Ref. 75995).
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
Costa, W.J.E.M., 2008. Rivulus formosensis, a new aplocheiloid killifish from the upper Corrente River drainage, upper Paraná River basin, central Brazil (Cyprinodontiformes: Rivulidae). Ichthyol. Explor. Freshwat. 19(1):85-90. (Ref. 75995)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00661 (0.00312 - 0.01398), b=3.10 (2.92 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
Daya lenting (Acuan 120179) |
Tinggi, Waktu penggandaan populasi minimum kurang dari 15 bulan (Preliminary K or Fecundity.). |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |