Planonasus indicus, Eastern dwarf false catshark

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Planonasus indicus Ebert, Akhilesh & Weigmann, 2018

Eastern dwarf false catshark
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Image of Planonasus indicus (Eastern dwarf false catshark)
Planonasus indicus
Female picture by Ebert, D.A./Akhilesh K.V.

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

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Carcharhiniformes (Ground sharks) 真鯊目 (Ground sharks) > Pseudotriakidae (False catsharks) 擬貓鮫科 (False catsharks)
Etymology: Planonasus: planus (L.), flat; nasus (L.), nose, referring to its soft, flat snout. (See ETYFish);  indicus: -icus (L.), belonging to: India, referring to type locality off India in northern Indian Ocean. (See ETYFish).

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

; 海洋 深海底的; 深度上下限 200 - 1000 m (Ref. 119154).

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

Indian Ocean: India and Sri Lanka.

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 64.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 119154)

簡短描述 型態特徵 | 形態測量圖

This species is distinguished from its closest congener P. parini by the absence of oral papillae on the roof, tongue, and floor of mouth; no distinct white mark on the free rear tip of the first dorsal fin, sides, and underside of head, and fin edges that are similar in color as body (vs. dusky); greater number of tooth rows in the lower jaw (ca. 153-156 vs. ca. 115-120); shorter upper labial furrows (0.6-0.8 vs. 0.9-1.2% TL and 0.7 vs. 1.0-1.2 times as long as lowers), spiracles longer (1.6 vs. 0.9-1.2% TL) and less high (0.8-0.9 vs. 1.2-1.8% TL); proportionally higher, more angular dorsal fins, especially the second dorsal fin; proportionally longer pectoral fins, larger anal fin; longer precaudal (79.4-79.7 vs. 74.6-79.1% TL), pre-second-dorsal (62.7 vs. 56.6-60.5% TL), pre-first-dorsal (36.5-37.0 vs. 34.5-36.5% TL), prepelvic (52.7-53.4 vs. 47.2-51.4% TL), and snout-anterior vent (56.1-57.1 vs. 50.7-53.9% TL) lengths; shorter distances for preorbital snout (7.3-7.7 vs. 8.3-8.5% TL); prepectoral length (22.7-23.0 vs. 24.0-25.4% TL); pelvic midpoint to second dorsal fin origin (4.8-5.6 vs. 5.6-7.7% TL); pelvic-anal space (4.8-5.2 vs. 5.5-5.8% TL) (Ref. 119154).

生物學特性     字彙 (例如 epibenthic)

Specimens were taken as bycatch in deep-sea longline fishery for gulper sharks (Centrophorus spp.) (Ref. 119154).

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


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

Ebert, D.A., K.V. Akhilesh and S. Weigmann, 2019. Planonasus indicus sp. n., a new species of pygmy false catshark (Chondrichthyes: Carcharhiniformes: Pseudotriakidae), with a revised diagnosis of the genus and key to the family. Marine Biodiversity 49:1321-1341. (Ref. 119154)

IUCN 瀕危狀態 (Ref. 125652)

  資料不足 (DD) ; Date assessed: 21 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





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網路資源

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00140 - 0.00989), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245).
營養階層 (Ref. 69278):  4.0   ±0.4 se; based on size and trophs of closest relatives
回復力
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (46 of 100) .
Climate Vulnerability (Ref. 125649):   (0 of 100) .