Eptatretus ancon

Eptatretus ancon (Mok, Saavedra-Diaz & Acero P., 2001)

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drawing shows typical species in Myxinidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Myxini 盲鰻綱 (醜魚) (hagfishes) > Myxiniformes (Hagfishes) 盲鰻目 (Hagfishes) > Myxinidae (Hagfishes) 盲鰻科 (Hagfishes) > Eptatretinae
Etymology: Eptatretus: Greek, epta = seven + Greek, tretos, -e, -on = with holes (Ref. 45335);  ancon: Named for the research vessel B/I ANCON of INVEMAR, from which the holotype was captured.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 海洋 深海底的; 非遷移的; 深度上下限 ? - 488 m (Ref. 41105).   深水域

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Western Central Atlantic: off La Punta de los Remedios, Caribbean Sea.
中西大西洋: 外海的 La Punta de los Remedios ,加勒比海。

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 22.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 41105)

簡短描述 型態特徵 | 形態測量圖

External aperture of its last efferent gill duct and pharyngocutaneous duct separated. Gill apertures nonlinear and crowded. Lengths of efferent gill ducts unequal with anterior ones much longer with length of first about 3 times that of last. Gill apertures 6. Slime pores: prebranchial 26; branchial 0; trunk 45; tail 9; total 80. Caudal and ventral finfold not well developed. Head, body, tail and finfold uniformly light brown in alcohol; eyespots faint, gill aperture margins not pale. Ventral aorta bifurcated between the fourth and fifth gill pouches (Ref. 41105).
它的最後輸出的鰓輸送管與咽頭管的外部孔分開。 鰓孔非線性而且擁擠。 鰓輸送管的長度不相等的與前面的一些更長具有第一個的長度大約 3 倍那最後。 鰓孔 6. 黏液孔: 前鰓 26; 鰓的 0; 軀幹 45; 尾部 9; 總計 80 。 尾部與腹的鰭褶不發展良好的。 頭部,身體,尾部與鰭褶均勻地當保存在酒精中時的淡褐色; 眼斑模糊的, 不灰白的鰓孔邊緣。 腹面大動脈在第四的與第五個鰓囊之間分叉了。 (參考文獻 41105)

生物學特性     字彙 (例如 epibenthic)

Iteroparous (Ref. 94918).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

Iteroparous (Ref. 94918). 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 ).中西大西洋: 外海的 La Punta de los Remedios ,加勒比海。

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

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)

IUCN 瀕危狀態 (Ref. 123251)

  資料不足 (DD) ; Date assessed: 11 November 2009

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00095 - 0.00438), b=2.93 (2.73 - 3.13), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  4.0   ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
瀕危性 (Ref. 59153):  Low vulnerability (11 of 100) .