Centromochlus akwe

Centromochlus akwe Coelho, Chamon & Sarmento-Soares, 2021

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drawing shows typical species in Auchenipteridae.

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> Siluriformes (Catfishes) > Auchenipteridae (Driftwood catfishes) > Centromochlinae
Etymology: Centromochlus: Greek, kentron = sting + Greek, mochlos, -ou = lever, crowbar (Ref. 45335); akwe: Named after the Akwê (Xerente self-denomination) indigenous people.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser benthopelagisch. Tropical

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South America: Brazil.

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 7.4 cm SL Männchen/unbestimmt; (Ref. 123897)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

This species is distinguished from Centromochlinae by having a vermiculated color pattern on the dorsum (vs. dorsum uniform in all Centromochlinae, except Tatia brunnea, T. dunni, and T. meridionalis). It is distinguished from these three aforementioned species by having the eye ventrolaterally displaced on head in a way that almost the entire eye is visible in ventral view (vs. eye displaced dorsolaterally and not visible in ventral view). It shares derived characters with other Centromochlus species such as the ventrolateral position of eye socket, a sphenotic notched for the exit of infraorbital canal, and with posterior serrations along pectoral-fin spine numerou. It is distinguished from its congeners by having the pectoral-fin spine with dark bars, alternating with light bars (vs. pectoral-fin spine with light and uniform color); further differs except C. carolae by the ventral surface of head moderate to largely pigmented (vs. ventral surface of head unpigmented in C. heckelii, C. existimatus, C. orca, C. musaicus, C. schultzi or with few scattered dark chromatophores in C. macracanthus and C. melanoleucus); differs from C. carolae by the presence of vermiculated color pattern or scattered chromatophores on lateral surface of the body that extends to the caudal peduncle (vs. lateral surface of the body with distinct demarcation between dark and light areas continuous posteriorly onto the caudal peduncle whereas the dark pigmentation extends nearly to the ventral midline); differs from C. schultzi by lacking dark large and rounded blotches over a pale background on head and trunk (vs. present; and by the smaller length of the dorsal-fin spine 18.1-27.1% of SL (vs. more than 27% of SL in C. macracanthus, C. heckelii, C. existimatus), and pectoral-fin spine 24.2-32.2% of SL (vs. more than 33% of SL in C. macracanthus, C. heckelii, C. existimatus) (Ref. 123897).
Cross section: oval.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

This species was found hidden in crevices within laterititic bedrock substrate covered by alluvial sediment, typical of the median portion of the Araguaia River basin and were manually collected and sometimes it was necessary to break the rocks to remove specimens that were hidden. The laterite is a geomorphological formation that originates from the weathering of lateritic crusts that cover the geological units, and is common at the middle and lower rio Araguaia stretches. Several species of Siluriformes that occur syntopically with this species were also collected: Centromochlus schultzi, Tatia intermedia, Auchenipterichthys longimanus, Rhinodoras boehlkei, Platydoras armatulus, Rhamdia quelen, Leporacanthicus galaxias, Peckoltia vittata, P. sabaji, Parancistrus aurantiacus, Pseudacanthicus sp., and Spectracanthicus javae. Specimens were collected in the twilight and daytime, with most of these collected during the morning and at periods of capture, the collected specimens were in lethargic condition (Ref. 123897).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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Coelho, F.L., C.C Chamon and L.M. Sarmento-Soares, 2021. A new species of driftwood catfish Centromochlus Kner, 1858 (Siluriformes, Auchenipteridae, Centromochlinae) from Tocantins-Araguaia River drainage. Zootaxa 4950(1):149-165. (Ref. 123897)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804) 		PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00490 (0.00196 - 0.01224), b=3.11 (2.90 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophische Ebene
(Ref. 69278) 		3.3   ±0.4 se; based on size and trophs of closest relatives
Widerstandsfähigkeit
(Ref. 120179) 		hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei
(Ref. 59153) 		Low vulnerability (12 of 100). 🛈