Classification / Names
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Siluriformes (Catfishes) >
Amphiliidae (Loach catfishes) > Amphiliinae
Etymology: Amphilius: Greek, amphi = on both sides + Greek, leios = fat; crassus: From the Latin noun crassus (m), meaning fat or stout in reference to the deep, stout body (Ref. 103388).
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce démersal. Tropical
Africa: Rufiji and Wami river basins, eastern Tanzania (Ref. 103388).
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 8.6 cm SL mâle / non sexé; (Ref. 103388)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 0; Rayons mous dorsaux (Total) : 7; Épines anales: 0; Rayons mous anaux: 8 - 10. Diagnosis: Amphilius crassus is diagnosed from A. jacksonii, A. ruziziensis, A. pedunculus and A. lujani by its shorter caudal peduncle, caudal peduncle length 13.3-15.5% of standard length vs. 16.0-20.9%, and from A. jacksonii, A. ruziziensis and A. lujani by its deeper caudal peduncle , caudal peduncle depth 10.1-12.0% of standard length vs. 4.8-9.5% (Ref. 103388). It is diagnosed from A. ruziziensis, A. pedunculus and A. frieli by its longer dorsal-fin insertion to adipose-fin insertion length, 42.2-44.6% of standard length vs. 37.5-41.7% (Ref. 103388). Amphilius crassus is further diagnosed from A. jacksonii by its deeper body, body depth at anus 14.5-17.4% of standard length vs. 9.6-13.2%, and from A. ruziziensis by wider interorbital width, 28.9-34.1% of head length vs. 23.4-25.1%, and deeper body, body depth at anus 14.5-17.4% of standard length vs. 11.1-12.9%; it is further diagnosed from A. lujani by having fewer branched pectoral-fin rays, 7-8, rarely 9 vs. 9, and from A. frieli by its fewer branchiostegal rays, 6-7, rarely 8 vs. 8-9, fewer branched pectoral-fin rays, 7-8, rarely 9 vs. 9-10, fewer gill rakers on the first gill arch, 6-8, rarely 9 vs. 10-11, rarely 9 or 12, and wider interorbital width, 28.9-34.1% of head length vs. 25.1-27.7% (Ref. 103388).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Thomson, A.W., L.M. Page and S.A. Hilber, 2015. Revision of the Amphilius jacksonii complex (Siluriformes: Amphiliidae), with the descriptions of five new species. Zootaxa 3986(1):61-87. (Ref. 103388)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources 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).
Niveau trophique (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Résilience (Ref.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
