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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Cynolebiinae
Etymology: longignatus: Name from Latin 'longi' meaning distant and 'gnatus' meaning born, referring to the long distance between the type locality of this new species and the area occupoed by the other species of the S. flammeus group in the Tocantins River basin.
More on author: Costa.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce pélagique. Tropical
South America: Brazil.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 2.9 cm SL mâle / non sexé; (Ref. 78710); 3.0 cm SL (female)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 17 - 26; Rayons mous anaux: 21 - 26; Vertèbres: 27 - 29. Distinguished by the following set of characters: females with slightly longer anal fin, almost spatula-shaped; males with bright blue anal fin and distinct concave dorsal profile of head; males' anterior part of dorsal fin with black spots and its caudal fin with transverse series of small blue spots; females' dorsal-fin origin in a vertical through the base of the 5th anal-fin ray; long filamentous rays on dorsal fin in males absent and D 23-26 (17-18 in females); males' anal fin slightly pointed, without filaments, and A 23-26 (21-23 in females); neuromasts in the supraorbital 12-14, infraorbital 2+18-20, preopercular 13-15, and mandibular series 10-11) (Ref. 78710).
Body shape (shape guide): short and / or deep; Cross section: compressed.
The collection site is a broad seasonal swamp close to the Pacoti River, a small, isolated coastal basin of NE Brazil with shallow part of the swamp 0.4-0.8 m deep. It has dense aquatic vegetation and slightly turbid water. Gut contents include amoebas and small aquatic arthropods, with larvae of Odonata and Chironomidae, a small Ostracoda and Cladocera specimens (Ref. 78710).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Costa, W.J.E.M., 2008. Simpsonichthys longignathus, a new seasonal killifish of the S. flammeus group from the Pacoti River basin, northeastern Brazil (Cyprinodontiformes: Rivulidae). Ichthyol. Explor. Freshwat. 19(2):155-159. (Ref. 78710)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Niveau trophique (Réf. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Résilience (Réf. 120179) |
Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.). |
Vulnérabilité de la pêche (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |