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Anguilliformes (Eels and morays) >
Synaphobranchidae (Cutthroat eels) > Ilyophinae
Etymology: Ilyophis: Greek, ilyos, -ou = cave + Greek, ophis = serpent (Ref. 45335).
Eponymy: Arx is Latin for castle, alluding to Dr Peter Henry John Castle (1934–1999), who “laid the foundations of modern work on synaphobranchid eels”. (See Castle) (Ref. 128868), visit book page.
Environment: milieu / climate zone / ລະດັບຄວາມເລິກ / distribution range
ນິເວດວິທະຍາ
ສັດທະເລ ກ່ຽວກັບ(ຢູ່)ຊັ້ນນ້ຳໃນທະເລທີ່ເໜີອພື້ນດິນ; ລະດັບຄວາມເລິກ 2375 - 4157 m (Ref. 132084). Deep-water; 30°N - 15°S (Ref. 132084)
East Central Pacific: from the Nazca Ridge off central Peru to seamounts northwest off Hawaii.
Length at first maturity / ຂະໜາດ / ນ້ຳໜັກ / Age
ການຈະເລີນເຕັມໄວ: Lm ?, range 24 - ? cm
Max length : 61.0 cm TL ຕົວຜູ້/ບໍ່ມີເພດ; (Ref. 132084)
Short description
ຕົວທີ່ໃຊ້ໃນການຈຳແນກຊະນິດ | ສະລີລະວິທະຍາ | ການວັດແທກຮູບຮ່າງລັກສະນະພາຍນອກຂອງດິນ,ສັດ,ປາ…
ຄີຫຼັງຂອງປາ (ຄີອ່ອນ) (ທັງໝົດ) : 309 - 322; ຄີກົ້ນຂອງປາ: 235 - 261; ສັດທີ່ມີກະດູກສັນຫຼັງ: 131 - 135. This species is distinguished by the following characters. body no dcales; trunk relatively long
(about 21-29% of TL); dorsal-fin origin (DFO) above the posterior third of pectoral fin; gape of mouth moderate, extending to near rear margin of eye; teeth not compound; intermaxillary teeth conical with approximately 16-24 teeth in the tooth patch, inner teeth on the patch nearly twice as large as the outer teeth; vomerine teeth contiguous with intermaxillary teeth with approximately 25-30 teeth, irregularly biserial to triserial anteriorly and uniserial posteriorly; both the intermaxillary and vomerine teeth set in beds of papillose tissue; maxillary teeth small, set in irregular rows, 3 rows anteriorly to 6 rows posteriorly; dentary teeth similar to maxillary teeth except they are slightly larger and more uniform in size anteriorly; lateral line short, confined to the anterior half of body (ca. 35-45% of TL); cephalic lateralis pores with supraorbital (SO) 3, infraorbital (IO) 5 (including adnasal, AD), preoperculomandibular (POM) 6-10; total vertebrae 129-136 (Ref. 132084).
Body shape (shape guide): eel-like; Cross section: oval.
This species may be a specialist of seamounts, ridges and island slopes, suggesting that it may only be found associated with rough topographies (Ref. 132084).
Tighe, K.A., D.G. Smith, N.R. Merrett, B.W. Frable and U. Zajonz, 2024. Redescription of the eel Ilyophis arx Robins, 1976 (Anguilliformes:
Synaphobranchidae: Ilyophinae) with a description of a new species of Ilyophis,
and a taxonomic synopsis of the Ilyophinae. Zootaxa 5506(1):35-57. (Ref. 132084)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
ການປະມົງ: ທີ່ບໍ່ມີຄວາມສົນໃຈ
ເຄື່ອງມື
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ແຫຼ່ງອີນເຕີເນັດ
Estimates based on models
Preferred temperature (ເອກະສານອ້າງອີງ
123201): 2 - 3.3, mean 2.7 °C (based on 14 cells).
Phylogenetic diversity index (ເອກະສານອ້າງອີງ
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
ຊັ້ນເຂດຮ້ອນ (ເອກະສານອ້າງອີງ
69278): 4.0 ±0.4 se; based on size and trophs of closest relatives
ຄວາມຢືດຢຸ່ນ (ເອກະສານອ້າງອີງ
120179): ຂະໜາດກາງ, ປະຊາກອນຕຳ່ສຸດທີ່ໃຊ້ເວລາສອງເທົ່າ 1.4 - 4.4 ປີ (Fec = 1,979).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
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