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Beloniformes (Needle fishes) >
Belonidae (Needlefishes)
Etymology: Potamorrhaphis: Greek, potamos = river + Greek, rhaphis = needle (Ref. 45335); labiata: Name from Latin word meaning large-lipped, referring to the expanded labial membrane diagnostic of this species; an adjective.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce pélagique; profondeur 0 - ? m. Tropical
South America: Brazil.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 17.5 cm OT mâle / non sexé; (Ref. )
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 29 - 34; Rayons mous anaux: 25 - 29. This species can be distinguished from Potamorrhaphis eigenmanni and P. guianensis by having the posterior third of the labial membrane highly expanded laterally, reaching to or passing the level of the ventral margin of the maxilla when folded ventrally (vs. narrow, not reaching the level of the ventral margin of the maxilla when folded ventrally); from P. eigenmanni by having 3 rows of accessory teeth on the lower jaw (vs. 2 rows), and 115-128 scales on the lateral line (vs. 97-119); from P. guianensis by having the contralateral branchiostegal membranes overlapping in the midventral line (vs. branchiostegal membranes not overlapping ventrally), 3 rows of accessory teeth on the lower jaw (vs. 4 rows), and dentary with coronoid process salient (vs. coronoid process not salient); from P. petersi by the coloration of the labial membrane with melanophores only in the inner margin (vs. melanophores uniformly distributed), 29-34 dorsal-fin rays (vs. 35-43), 25-29 anal-fin rays (vs. 30-39), deeper caudal peduncle (2.1-2.7 vs. 1.1-1.6% BL), longer predorsal length (62.9-67.6 vs. 59.5-62.8% BL), longer pectoral-pelvic distance (38.5-42.6 vs. 36.0-38.1% BL), and longer head length (17.6-18.9 versus 15.8-17.9% BL) (Ref. 92518).
Length type used is body length (BL), measured from the anterior margin of the nasal bone to the hypural plate (Ref. 92518).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Sant'Anna, V.B., M.L.S Delapieve and R.E. Reis, 2012. A new species of Potamorrhaphis (Beloniformes: Belonidae) from the Amazon Basin. Copeia, 2012(4):663-669. (Ref. 92518)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
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Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf. 82804) |
PD50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00126 (0.00056 - 0.00281), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Niveau trophique (Réf. 69278) |
3.9 ±0.6 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 (17 of 100). 🛈 |