Hoplocephalus

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Lepidosauromorpha
Superordo: Lepidosauria
Ordo: Squamata
Subordo: Serpentes
Infraordo: Caenophidia
Superfamilia: Elapoidea

Familia: Elapidae
Subfamilia: Hydrophiinae
Genus: Hoplocephalus
Species: H. bitorquatus – H. bungaroides – H. stephensii –
Name
Hoplocephalus (Wagler, 1830)

Hoplocephalus is a genus of venomous snakes in the family Elapidae. The genus is endemic to Australia. Three species are recognized.

Description

Snakes of the genus Hoplocephalus have a pair of large grooved venom fangs, which are followed by two or three small maxillary teeth. The mandibular teeth are longest anteriorly. The head is distinct from the neck. The eye is rather small, with a round pupil. There is no loreal scale. The dorsal scales are smooth, without apical pits, and are arranged in 21 rows at midbody. The subcaudals are entire (undivided).[2]
Species

The genus Hoplocephalus contains the following species which are recognized as being valid.[3]

Hoplocephalus bitorquatus (Jan, 1859) – pale-headed snake
Hoplocephalus bungaroides (Schlegel, 1837) – broad-headed snake
Hoplocephalus stephensii Krefft, 1869 – Stephens' banded snake

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Hoplocephalus.
References

Wikispecies
Boulenger GA (1896). Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 757 pp. + Plates I–XXV. (Genus Hoplocephalus, p. 348).

Genus Hoplocephalus at The Reptile Database www.reptile-database.org.

Wikispecies has information related to Hoplocephalus.
Further reading

Wagler J (1830). Natürliches System der AMPHIBIEN, mit vorangehender Classification de SÄUGTHIERE und VÖGEL. Ein Beitrag zur vergleicheden Zoologie. Munich, Stuttgart and Tübingen: J.G. Cotta. vi + 354 pp. + one plate. (Hoplocephalus, new genus, p. 172). (in German and Latin).