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Siluriformes (Catfishes) >
Pimelodidae (Long-whiskered catfishes)
Etymology: Exallodontus: Name from Greek 'exallos' for quite different and 'odontos' for tooth; referring to the unique form of the teeth; aguanai: Named for Sr. Leonidas Aguana of the Instituto de Zoologia Tropical Universidad Central de Venezuela.
Eponymy: Leonidas Aguana is a technician at Instituto da Zoologia Tropical, Universidad Central de Venezuela. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный демерсальный; пределы глубины 20 - 30 m (Ref. 58018). Tropical
South America: Amazon and Orinoco River basins.
Size / Вес / Возраст
Maturity: Lm ?  range ? - ? cm
Max length : 20.0 cm SL самец/пол неопределен; (Ref. 36506)
Краткое описание
определительные ключи | морфология | морфометрия
колючие лучи спинного плавника (общее число) : 2; членистые (мягкие) лучи спинного плавника (общее число) : 6; членистые (мягкие) лучи анального плавника: 11 - 14; позвонки: 46 - 50. Distinguished by having 2-3 rows of heavy, firmly attached conical teeth on premaxillae and dentaries; lacrimal (= infraorbital 1+2) shaped as an obtuse-angled triangle with nearly straight sides; relatively long, nearly straight-margined adipose fin (its length 2.0-2.5 in SL); short dorsal fin spine, low dorsal fin (spine length 5.6-8.6 in SL); relatively small head (head length 4.0-5.2 times in SL); small eye (horizontal diameter 3.4-5.5 times in snout length, 7.4-12.0 times in head length); neural spines of vertebrae 13 or 14 - 23 or 24 oriented 90°to horizontal axis of centra; supraoccipital process with a narrow median keel above somewhat concave sides, markedly angular in cross-section, slender and tapering to its peg-and-socket joint with supraneural (basal width of supraoccipital process about 2 times in length); anterior anal-fin rays broad, forming a paddle-like blade; posterior nostril ovoid, its long axis oriented transversely (Ref. 57763).
Life cycle and mating behavior
половая зрелость | размножение | нерест | икра | Fecundity | личинки
Lundberg, J.G., F. Mago-Leccia and P. Nass, 1991. Exallodontus aguanai, a new genus and species of Pimelodidae (Pisces: Siluriformes) from deep river channels of South America, and delimitation of the subfamily Pimelodinae. Proc. Biol. Soc. Wash. 104 (4):840-869. (Ref. 57763)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-2)
Угроза для людей
Harmless
Использование человеком
дополнительная информация
инструменты
Специальные отчеты
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00427 - 0.01947), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.8 ±0.7 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref.
120179): высокий, минимальное время удвоения популяции до 15 месяцев (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (14 of 100).