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Myxini 盲鰻綱 (醜魚) (hagfishes) > Myxiniformes (Hagfishes) 盲鰻目 (Hagfishes) > Myxinidae (Hagfishes) 盲鰻科 (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); atami:Named for Atami, west coast of Sagami Bay, Japan, type locality (See ETYFish).
Environment: milieu / climate zone / 深度上下限 / distribution range 生態學
Gill pouches (GP) 6 pairs with gill apertures closely spaced in a fairly straight line; 1-2 GP at end of dental muscle. Ventral aorta splitting at about GP 5-6. Fused cusps 3/3. Total cusps 47-52. Prebranchial slime pores 12-19. Total pores 71-78. Eyespots faint or absent. Ventral finfold low to vestigial (Ref. 51420). Body shape (shape guide): eel-like. 鰓囊 (GP)6 對，鰓孔間隔很密的成一直線; 在牙齒肌肉的末端的 1-2 GP。 腹面大動脈於大約 GP 5-6 分離. 融合的尖頭 3/3. 總尖頭 47-52. 前鰓黏液孔 12-19. 總孔 71-78. 眼斑模糊或不存在。 腹面鰭褶低的到退化的.(參考文獻 51420)
Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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 ).西北太平洋: 日本。 眾人皆知的日本周圍與其他的未命名的種互相混淆了。 (參考文獻 31276)
Fernholm, B., 1998. Hagfish systematics. p. 33-44. In J.M. Jørgensen, J.P. Lomholt, R.E. Weber and H. Malte (eds.) The biology of hagfishes. Chapman & Hall, London. 578 p. (Ref. 31276)
Phylogenetic diversity index (參考文獻 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00204 (0.00094 - 0.00444), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (參考文獻 69278): 4.5 ±0.80 se; based on food items.
回復力 (參考文獻 120179): 低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153): Moderate vulnerability (44 of 100). 🛈
