A small, unusual group of advanced snakes, often called mole vipers or stilleto snakes. Recently, molecular evidence has shown that this family includes many genera formerly classed in other families, on the basis of fang type. This odd family of snakes seems to include fangless (aglyphous), rear-fanged (opisthoglyphous), fixed-fanged (proteroglyphous), and viper-like (solenoglyphous) species. Molecular and physiological data linking this family to others is ambiguous and often contradictory, which means the taxonomy of this family is highly contentious. The nominate family, Atractaspididae has itself been moved to and from other taxa, reinforcing the ambiguity of this family. Jump to: navigation, search Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Jump to: navigation, search Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Subregnum Bilateria  Acoelomorpha  Orthonectida  Rhombozoa  Myxozoa  Superphylum Deuterostomia     Chordata (vertebrates, etc. ... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders  Crocodilia - Crocodilians scary crocodiles. ... Suborders Amphisbaenia - Worm lizards Sauria- Lizards Serpentes - Snakes Squamata (scaled reptiles) is the largest recent order of reptiles, including lizards and snakes. ... Jump to: navigation, search Superfamilies and Families Henophidia Aniliidae Anomochilidae Boidae Bolyeriidae Cylindrophiidae Loxocemidae Pythonidae Tropidophiidae Uropeltidae Xenopeltidae Typhlopoidea Anomalepididae Leptotyphlopidae Typhlopidae Xenophidia Acrochordidae Atractaspididae Colubridae Elapidae Hydrophiidae Viperidae Snakes are cold blooded legless reptiles closely related to lizards, which share the order Squamata. ... Families Acrochordidae Aniliidae Anomalepididae Anomochilidae Atractaspididae Boidae Bolyeriidae Colubridae Cylindrophiidae Elapidae Hydrophiidae Leptotyphlopidae Loxocemidae Pythonidae Tropidophiidae Typhlopidae Uropeltidae Viperidae Xenopeltidae Snakes are cold blooded legless reptiles closely related to lizards, which share the order Squamata. ... Fang may mean: One of the Beti-Pahuin ethnic groups of Central Africa; A pointed tooth; A transliteration of Chinese Family Names æ–¹,防,房 etc. ...

The most well-known (and most lethal) of this family is the genus Atractaspis itself, a small African snake with fangs that, rather than swinging forward like those of a viper, swing outward to the sides, allowing the snake to strike with its mouth closed by swinging its head. This odd behavior has resulted in the envenomation of otherwise cautious herpetologists, including Mark O'Shea, whose accidental bite was caught on film while taping for his TV show, as was his subsequent rush to the nearest hospital. He survived, but others have not been so fortunate in the past. World map showing location of Africa A satellite composite image of Africa Africa is the worlds second_largest continent in both area and population, after Asia. ... Genera Adenorhinos Atheris Azemiops Bitis Cerastes Daboia Echis Eristicophis Macrovipera Montatheris Proatheris Pseudocerastes Vipera This page is about Viper snakes. ... Herpetology is the branch of zoology concerned with the study of reptiles and amphibians, including their classification, ecology, behavior, physiology, anatomy, and paleontology. ...

In summation, members of this family present a fascinating conundrum, but one best handled with extreme caution.