| 词条 | Hydrophis melanocephalus |
| 释义 |
| name = Hydrophis melanocephalus | image = Japan sea snake, Slender-necked Seasnake (Hydrophis melanocephalus) (15601772710).jpg | genus = Hydrophis | species = melanocephalus | authority = Gray, 1849 | synonyms = *Hydrophis sublævis Var. melanocephala Gray, 1849
}}Hydrophis melanocephalus, commonly known as the slender-necked sea snake, is a species of venomous sea snake in the family Elapidae.[2] Geographic range
DescriptionHead black dorsally and ventrally, with a yellowish bar on the prefrontals, and with a yellowish streak behind the eye on the postocular and upper portion of last upper labial. Anterior part of body black dorsally and ventrally, with yellow crossbars on the dorsum. Posterior part of body olive dorsally and yellow ventrally, with black rings, which are broader on the dorsum. The type specimen, a female, is {{convert|107|cm|in|abbr=on}} in total length, with a tail {{convert|8.5|cm|in|frac=4|abbr=on}} long. All dorsal scales rhomboidal and imbricate (overlapping). Dorsal scales on neck smooth, arranged in 25 rows. Dorsal scales on body with a short keel or small tubercle, in 35 rows. Ventrals 329. Head very small. Body long, very slender anteriorly. Rostral slightly broader than deep. Frontal nearly twice as long as broad, as long as its distance from the rostral, slightly shorter than the parietals. One preocular and one postocular. A single anterior temporal. Seven or eight upper labials, second largest and in contact with the prefrontal, third and fourth (or third, fourth, and fifth) entering the eye. Two pairs of small chin shields, in contact with each other. Tail laterally flattened, oar-like.[3] References1. ^The Reptile Database. www.reptile-database.org. 2. ^{{ITIS |id=700227 |taxon=Hydrophis |accessdate=7 September 2007}} 3. ^Boulenger, G.A. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Heteroglyphæ),... Trustees of the British Museum (Natural History). London. xiv + 727 pp., Plates I.-XXV. (Hydrophis melanocephalus, p. 283 & Plate XV.) Further reading
9 : Sea snakes|Reptiles of Asia|Reptiles of China|Reptiles of Korea|Reptiles of Western Australia|Reptiles of Japan|Taxa named by John Edward Gray|Reptiles described in 1849|Snakes of Australia |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。