Maculabatis randalli, Arabian banded whipray

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Maculabatis randalli (Last, Manjaji-Matsumoto & Moore, 2012)

Arabian banded whipray
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Image of Maculabatis randalli (Arabian banded whipray)
Maculabatis randalli
Picture by Osmany, H.B.

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) > Myliobatiformes (Stingrays) 鰩目 (Stingrays) > Dasyatidae (Stingrays) 土魟科 (Stingrays) > Urogymninae
Etymology: .randalli: Named for J.E. Randall, Bishop Museum; whose work on the taxonomy of Indo-Pacific fishes is legendary, and who was amongst the first authors to publish a photographic image of this species (as H. gerrardi) in his guide to the fishes of Oman (Randall, 1995).  More on authors: Last, Manjaji-Matsumoto & Moore.

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

; 海洋 居於水底的; 深度上下限 1 - 40 m (Ref. 90168), usually - m (Ref. ).   

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

Western Indian Ocean: off Kuwait, Bahrain, Qatar and Iran. known from the Persian Gulf from where it is possibly endemic (Ref. 90168).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 41.2 cm WD 雄魚/尚未辨別雌雄; (Ref. 90168)

簡短描述 型態特徵 | 形態測量圖

This medium-sized species (to at least 62 cm DW) is distinguished by the following set of characters: disc weakly rhomboidal; preorbital snout moderately elongate with weak apical lobe, snout angle 113-119°; rounded pectoral-fin apices, angle 96-98°; small, protrusible orbits; relatively broad mouth, its width 0.9-1.2 in internasal width; distance between first gill slits 2.5-2.6 times internasal distance; distance between fifth gill slits times 1.5-1.7 times internasal distance, 27-29% of ventral head length; broad pelvic-fin base, 13-17% DW; in juveniles, the tail behind sting is subcircular with deep longitudinal ventral groove and prominent mid-lateral ridge, in adults, it is weakly depressed; 1-2 (usually 1) small, broadly heart-shaped to seed shaped suprascapular denticles, primary denticle band and thorns absent; secondary denticle band irregularly sub-oval, relatively narrow (its maximum width across scapulocoracoid barely exceeding its width at spiracles), with well-defined lateral margins, narrowly tapering near tail base; fully developed band and covering entire dorsal surface of tail by 33 cm DW; dorsal surface mainly uniformly coloured (occasionally with dark flecks in specimens smaller than 25 cm DW), disc margin sometimes paler dorsally; ventral disc uniformly whitish, not black edged; in adults, darker dorsal surface of tail sharply demarcated from paler ventral surface; in neonates and juveniles, dark tail with conspicuous white saddles, its distal portion usually almost uniformly dark; pectoral-fin radials 124-129; 108-111 total vertebral count (excluding 1st synarcual centra), 43-44 monospondylous centra, 65-68 pre-sting diplospondylous centra (Ref. 90168).

生物學特性     字彙 (例如 epibenthic)

Known from the Persian Gulf which is mostly shallower than 40 m and with depths rarely exceeding 60 m; soft substrates, mostly sand and mud (Ref. 90168).

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 : McEachran, John | 合作者

Last, P.R., B.M. Manjaji-Matsumoto and A.B.M. Moore, 2012. Himantura randalli sp. nov., a new whipray (Myliobatoidea: Dasyatidae) from the Persian Gulf. Zootaxa 3327:20-32. (Ref. 90168)

IUCN 瀕危狀態 (Ref. 124695)

  無危 (LC) ; Date assessed: 08 February 2017

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 





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Estimates based on models

Preferred temperature (Ref. 115969): 24.4 - 29.3, mean 26.9 °C (based on 128 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00366 - 0.01891), b=3.10 (2.90 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.7   ±0.4 se; based on size and trophs of closest relatives
回復力
瀕危性 (Ref. 59153):  Very high vulnerability (90 of 100) .