Myxini (миксины) (hagfishes) >
Myxiniformes (Hagfishes) >
Myxinidae (Hagfishes) > Eptatretinae
Etymology: Eptatretus: hepta (Gr.), seven; tretos (Gr.), perforated (i.e., with holes), referring to seven gill apertures on what would later be described as Homea banksii (=E. cirrhatus) [range within genus is 6-14 pairs of gill apertures] (See ETYFish); wayuu: Named for the Wayuu aborigines who live on the Guajira Peninsula of Colombia, type locality (See ETYFish).
Eponymy: These species are named after the Wayuu, an aboriginal people who live on the coastal region of the Guajira Peninsula (northern Colombia/north-west Venezuela), the type locality. (Ref. 128868), visit book page.
Окружающая среда: среда / климатическая зона / пределы глубины / диапазон распространения
экология
морской батидемерсальный; немигрирующий; пределы глубины ? - 306 m (Ref. 41105). Deep-water
Western Atlantic: known only from the Guajira coast near Puerto Bolivar, Colombia, Caribbean Sea.
Размер / Вес / Возраст
половая зрелость: Lm ?  range ? - ? cm
Max length : 21.6 cm TL самец/пол неопределен; (Ref. 41105)
Краткое описание
определительные ключи | морфология | морфометрия
Ventral aorta bifurcated into left and right branches at gill pouches one (anteriormost pouch) or two versus bifurcated at the fifth or sixth gill pouches in congeners and P. springeri. Five branchial apertures arranged in a straight line; lengths of efferent branchial ducts unequal with the first duct about twice the length of the last duct. Last branchial duct confluent with pharyngocutaneous duct, last aperture on the left side much larger than other apertures. Gill apertures 5. Slime pores: prebranchial 24; branchial 2; trunk 38-40; tail 9; total 73-75. Cylindrical body, laterally compressed toward spatulate tail. Caudal and ventral finfold well developed. Head, body, tail and finfold pink when fresh, dark violet in alcohol; eyespots faint, branchial region much lighter colored than other parts of the body; gill aperture margins pale (Ref. 41105).
Body shape (shape guide): eel-like; Cross section: circular.
Жизненный цикл и брачное поведение
половая зрелость | размножение | нерест | икра | Плодовитость | личинки
Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Ref. 51361 ).
Mok, H.-K., L.M. Saavedra-Diaz and A.P. Acero, 2001. Two new species of Eptatretus and Quadratus (Myxinidae, Myxiniformes) from the Caribbean Coast of Colombia. Copeia 2001(4):1026-1033. (Ref. 41105)
Статус Красного Списка МСОП (Ref. 130435: Version 2025-2 (Global))
Угроза для людей
Harmless
Использование человеком
рыболовство: интереса не представляет
дополнительная информация
инструменты
Специальные отчеты
Скачать в формате XML
ресурсы в Интернет
Оценки, основанные на моделях
Индекс филогенетического разнообразия (ссылка 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
a=0.00204 (0.00095 - 0.00440), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Трофический уровень (ссылка 69278) |
3.9 ±0.7 se; based on size and trophs of closest relatives |
устойчивость к внешним воздействиям (ссылка 120179) |
низкий, минимальное время удвоения популяции 4.5-14 лет (Fec assumed to be <100). |
Уязвимость рыбной ловли (Ref. 59153) |
Low vulnerability (24 of 100). 🛈 |