Cá Đuối bồng đuôi vằn
Dasyatis kuhlii
Thông tin chính
Phân bố
Mẫu vật & Tài liệu
Sinh học — Sinh thái BIO
Ghi chú chi tiết
Diagnosis. A medium-sized Neotrygon of the kuhlii - complex (reaching at least 30 cm DW) with the following combination of characters: disc broader than long, width ~ 1.2 times length; pectoral apices narrowly rounded; snout rather fleshy, broadly angular, angle ~ 107 °, length 1.7 – 2.1 times interorbital width; maximum width relatively well back on disc, length from snout tip to pectoral-fin insertion 1.8 – 1.9 times and disc width 2.5 – 2.6 times horizontal distance from snout tip to maximum disc width; preoral length 2.4 – 2.8 times mouth width; internasal distance 1.5 – 1.8 in prenasal length; interspiracular distance 13 – 15 % DW; nostril length 2.8 – 4.1 % DW; nasal curtain width 8 – 8.3 % DW; small mouth, width 6.4 – 6.8 % DW; horizontal distance from cloaca to caudal sting base ~ 55 % of disc length; thornlets present in nuchal region, absent from tail in all sizes; dermal denticles absent; pectoral-fin radials 113 (based on new specimen); total vertebral centra (including synarcual) 133, trunk centra (including synarcual) 39; blue spots very small and sparse, largest spot on disc 0.3 – 0.5 times eye width; 0 – 6 (mean 3.0) blue spots on medial belt, largest ~ 2.1 % DW; mask-like marking pronounced, not covered with dark peppery spots; ventral surface of disc and pelvic fins with broad dark greyish submarginal bands; ventral tail fold and adjacent tail bluish grey when fresh.
