分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii 板鳃亚纲 (鲨鱼与 鱼) (sharks and rays)
(Skates and rays) > Rajidae
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335); parva: Name from Latin word 'parva' meaning small, referring to the small adult size of this skate compared to most of its congeners.
Environment: milieu / climate zone / depth range / distribution range
; 海洋 底中水层性; 深度上下限 - 27 m (Ref. 110364), usually - m (Ref. ).
国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri
Eastern Central Atlantic: known from Liberia, Senegal (Dakar) and Angola; probably more widspread.
大小 / 重量 / 年龄
Maturity: Lm ?  range ? - ? cm
Max length : 37.1 cm TL 雄鱼/尚未辨别雌雄; (Ref. 110364); 41.1 cm TL (female)
型态特徵 | 形态测量图
This species is distinguished by the following set of characters: subcircular disc, its width 57-60% TL, 1.2 times its length; snout angle 91-96°; short tail, its length 1.2-1.4 times distance from snout tip to rear of cloaca; narrow tail, its width 1.2-1.3 times height at its midlength, 1.1 times at first dorsal-fin origin; pre-upper jaw length 10-13% TL, 1.5-1.8 times internasal width; length of ventral head 24-26% TL; length of snout 3-3.8 times interorbital width; orbit diameter 1.06-0.99 times the interorbital width; height of first dorsal-fin 3.4-3.9 in its base length; procaudal tail long, its length from first dorsal-fin origin to tail tip is 3.8-4.7 times first dorsal-fin base length, 3.4-3.6 times caudal-fin length (base of epichordal lobe of caudal fin very long); relatively short pelvic fins, length of posterior lobe 17-18% TL and of anterior lobe 63-72% of posterior lobe; in adults clasper relatively large, ~24% TL, connected to pelvic-fin inner margin at ~47% of its length from cloaca; anterior margin of head possess denticle bands on both surfaces in adult male; nuchal thorns 2; adult male with well-developed malar thorn patch; thorn rows on tail 3-5; pectoral-fin radials 79-81 in total; trunk centra is usually 27-28; usually 75-86 predorsal centra; total centra ~128-131; 38-46 tooth rows in upper jaw; colour brown dorsally with faint lighter and darker speckling; pectoral ocelli is moderately large, with dark bluish grey spot surrounded by a black and a yellow ring; its ventral surface whitish with reddish yellow snout tip and disc margin (Ref. 110364).
Unknown depth range but probably inshore for at least some collected specimens were caught by gill-net (Ref. 110364).
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Last, P.R. and B. Séret, 2016. A new Eastern Central Atlantic skate Raja parva sp. nov. (Rajoidei: Rajidae) belonging to the Raja miraletus species complex. Zootaxa 4147(4):477-489. (Ref. 110364)
合作者照片Stamps, Coins Misc.声音神经毒速度泳型鳃区Otoliths脑重体重比眼睛色素
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
营养阶层 (Ref. 69278
): 3.6 ±0.6 se; based on size and trophs of closest relatives
回复力 (Ref. 120179
): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153
): Low to moderate vulnerability (33 of 100) .