分類 / Names
俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
(Shovelnose rays) > Rhinidae
Etymology: Rhynchobatus: Greek, rhingchos = snout + Greek, batis, -idos = a sting ray (Raja sp.) (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
; 海洋; 深度上下限 ? - 70 m (Ref. 114953).
國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri
Western Pacific: Singapore and Indonesia.
大小 / 重量 / 年齡
Maturity: Lm ?  range ? - ? cm
Max length : 81.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 109575)
型態特徵 | 形態測量圖
This species is the smallest of the wedgefishes (to 81 cm TL), it has also the lowest vertebral count (less than 107 centra). It is distinguished from its congeners by the following characters: a long, hastate snout; very strongly undulate anterior pectoral-fin margin; dorsal mainly dark and distinctively marked with white blotches; spots and streaks, with a dark cruciate marking on the interorbit; a prominent white border around the body margin; snout tip lacks dark blotches; absence of the black pectoral-fin marking; it is similar with the much larger Atlantic species (Rhynchobatus luebberti) with well-developed rostral spines, but these spines are confined to the snout tip (vs. being more numerous and extending in paired rows along the rostral ridges nearly to the eyes) (Ref. 109575).
A poorly known benthic species with restricted distribution, probably coastal. Males mature at ca. 71 cm TL, born at ca. 14 cm TL. Embryos with yolk sacs at 20.9-23.6 TL; juvenile male at 39.5 cm TL, adolescent at 64.2 cm TL and adult at size greater than 70.5 cm TL; immature females at 41.5 and 60.9 cm TL (Ref. 114953).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Last, P.R., P.M. Kyne and L.J.V. Compagno, 2016. A new species of wedgefish Rhynchobatus cooki (Rhinopristoformes, Rhinidae) from the Indo-West Pacific. Zootaxa 4139(2):233-247. (Ref. 109575)
CITES (Ref. 115941)
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5049 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00150 - 0.01008), b=3.11 (2.88 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
營養階層 (Ref. 69278
): 3.4 ±0.6 se; Based on size and trophs of closest relatives
瀕危性 (Ref. 59153
): Low to moderate vulnerability (34 of 100) .