Trichogenes claviger

Trichogenes claviger de Pinna, Helmer, Britski & Nunes, 2010

Envoyez vos Photos et vidéos
 Images | Images Google
Image of Trichogenes claviger
Trichogenes claviger
Photo de Sarmento-Soares, L.M.

Classification / Noms Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) > Trichogeninae
Etymology: Trichogenes: Greek, thrix = hair + Greek, genes, genesis = birth, race (Ref. 45335); claviger: The specific name refers to club-bearing in Latin, an allusion to the peculiar shape of the hypertrophied posterior process of the opercle in males of this species. An adjective.

Environnement : milieu / zone climatique / profondeur / gamme de distribution Écologie

; eau douce démersal. Tropical

Distribution Territoires | Zones FAO | Écosystèmes | Occurrences | Carte par point | Introductions | Faunafri

South America: known only from the type locality, an upland tributary of the headwaters of the rio Itapemirim drainage in southeastern Brazil.

Taille / Poids / Âge

Maturité: Lm ?  range ? - ? cm
Max length : 5.1 cm SL mâle / non sexé; (Ref. 85858)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Three autapomorphies distinguish T. claviger from all other members of the family: the sexually dimorphic posterior process of the opercle, much elongated in males (vs. short in both males and females); the terminal mouth (vs.subterminal or inferior); and the presence of an anterodorsal claw-like process on the dorsal surface of the neural arch of each of the anterior four free vertebrae. This species is distinguished from T. longipinnis, by several additional characteristics (some of which may also be autapomorphic, pending more detailed analysis): shape of the interopercle, with odontodes extending onto the posterodorsal margin of the interopercle on a bony expansion (vs. odontodes mostly restricted to ventral and posterior margins of the bone); posterior naris broader than long (vs. round); presence of an entirely differentiated fleshy lobe laterally on the lower lip (vs. fleshy lobe mostly continuous with the lower lip); no branched anal-fin rays in specimens of any size (vs. most rays branched in specimens over 41 mm SL); less deep caudal peduncle, 9.3-11.5 (vs. 10.3-12.6% SL); deeper head, head depth 72.9-86.6 (vs. 50.3-62.8% HL); no antorbital (vs. plate-like antorbital present dorsally to antorbital process of lateral ethmoid); deep coronoid process of the lower jaw (vs. coronoid process approximately one-third less deep); flattened bifurcated tooth cusps, with roundish margins (vs. bifurcated tooth cusps conical, pointed); vertebrae 35 (vs. 38 or 39); branchiostegal rays 6 (vs. 7); no pelvic splint (vs. present); pleural ribs 8 (vs. 10 or 11); few sparse dark spots on body (spots more numerous and more densely arranged); well-defined thin dark line along base of anal fin, formed by a regular row of slanted elongate spots on the distal portion of each pterygiophore (vs. no such line); no dark spots on the sides of head (vs. lateral surfaces of head with roundish spots); dark spots on body not extending onto base of caudal fin (vs. spots covering bases of principal caudal-fin rays). The deepest part of the body of T. claviger is at the middle of the abdomen, continuously less deep posteriorly to the base of the caudal fin, and the dorsal and ventral profiles of the head forming broad symmetrical arcs with the body profile, and these result in a rather different general aspect when compared to T. longipinnis, where the deepest part of the body is at the origin of the anal fin, and the body depth is approximately even along its entire length, only slightly decreasing towards the caudal fin. Also, the dorsal and ventral profiles of the head and body are not symmetrical, in T. claviger, it is gently convex and in T. longipinnis it is approximately straight (Ref. 85858).
Body shape (shape guide): elongated.

Biologie     Glossaire (ex. epibenthic)

The specimens were collected in a shallow sector (ca. 30 cm) of the córrego Picada Comprida, on a plateau at ca. 1150 m altitude, water is darkly tea-stained and transparent, with slow current and negligible altitudinal gradient. The stream runs through an area of moderately impacted high-altitude rainforest mingled with sectors of exotic pine culture. The substrate is mostly exposed sand, with masses of accumulated leaf litter and other vegetable debris in many spots. Fish were concentrated on quiet shaded areas with litter, swimming in midwater, and were collected with hand seines. No associated fish species were found with this species. Gut contents revealed numerous disarticulated arthropod remains, indicating that the feeding habits of the species are broadly similar to those of T. longipinnis. The species were also observed swimming in two other nearby spots in tributaries to the córrego Picada Comprida, but were not seen in four additional collection points in the same stream system and their distribution seems to be patchy (Ref. 85858).

Cycle de vie et comportement reproducteur Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Téléchargez vos références | Références | Coordinateur : Pinna, Mário de | Collaborateurs

de Pinna, M.C.C., J.L. Helmer, H.A. Britski and L.R. Nunes, 2010. A new species of Trichogenes from the rio Itapemirim drainage, southeastern Brazil, with comments on the monophyly of the genus (Siluriformes: Trichomycteridae). Neotrop. Ichthyol. 8(4):707-717. (Ref. 85858)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))

  Niveau de menace critique (CR) (B2ab(iii)); Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

FAO - Publication: search | FishSource |

Plus d'informations

Écologie trophique
Aliments (proies)
Composition du régime alimentaire
Consommation alimentaire
Rations alimentaires
Prédateurs
Écologie
Écologie
Dynamique des populations
Paramètres de croissance
Âges / tailles maximales
Longueur-poids rel.
Rel. longueur-longueur.
Fréquences de longueurs
Conversion de masse
Recrutement
Abondance
Cycle de vie
Reproduction
Maturité
Maturité/épines rel.
Fécondité
Frai
Agrégats de frai
Œufs
Développement de l'œuf
Larves
Dynamique des populations larvaires
Distribution
Territoires
Zones FAO
Écosystèmes
Occurrences
Introductions
BRUVS - Vidéos
Anatomie
Surface branchiale
Cerveau
Otolithe
Physiologie
Composition corporelle
Nutriments
Consommation d'oxygène
Type de natation
Vitesse de nage
Pigments visuels
Son de poisson
Maladies et parasites
Toxicité (CL50)
Génétique
génôme
Génétique
Hétérozygotie
Héritabilité
Diversité génétique
Liées à l'homme
Systèmes d'aquaculture
Profils d'aquaculture
Souches
Cas de ciguatera
Timbres, pièces de monnaie, divers
Sensibilisation
Collaborateurs
Taxonomie
Noms communs
Synonymes
Morphologie
Morphométrie
Images
Références
Références

Outils

E-book | Guide de terrain | Générateur de fréquences de longueur | Outil de dynamique de population | Carte par point | Capture-MSY |

Articles particuliers

Maintenance en aquarium | Articles sur l'espèce | Rapports d'aquaculture

Télécharger en XML

Page de résumé | Coordonnées géographiques | Noms communs | Photos

Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimations basées sur des modèles

Indice de diversité phylogénétique
(Réf. 82804) 		PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Niveau trophique
(Réf. 69278) 		3.2   ±0.4 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche
(Ref. 59153) 		Low vulnerability (10 of 100). 🛈