Toxicocalamus: A Guide to the Species and Its History

Toxicocalamus is a genus of snakes that belongs to the family Elapidae. The genus was first described in 1877 by the Australian herpetologist George Robert Gray.

Toxicocalamus snakes are found in the tropical regions of New Guinea and nearby islands. They are relatively small, with most species reaching a length of less than 1 meter.

Some species of Toxicocalamus are venomous, while others are non-venomous. However, all species in the genus have a similar appearance, with a slender build and a pattern of brown or gray markings on their bodies.

These snakes are generally solitary and nocturnal, spending most of their time hiding in dense vegetation or under rocks.

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Toxicocalamus is a genus of venomous snakes found in the island of New Guinea and surrounding islands.

They are characterized by their fixed front-fangs, which are a dental arrangement known as proteroglyphous.

These snakes are relatively small and secretive, making them rarely encountered in the field.

Their venom is believed to be fairly toxic, containing Three-Finger Toxins, Type-I Phospholipase A2, and Snake Venom Metalloproteinase.

The genus is endemic to the island of New Guinea and surrounding islands, including the d'Entrecasteaux Archipelago, Woodlark Island, and the Louisiade Archipelago.

Toxicocalamus snakes are fossorial, or semi-fossorial, in habit, meaning they spend most of their time underground or burrowing.

Their prey consists almost entirely of earthworms, particularly giant earthworms of the Megascolecidae family.

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The venom of Toxicocalamus snakes contains three-finger toxins (3FTx), Type-I phospholipase A2 (PLA2) and snake venom metalloproteinase (SVMP).

These toxins are found in the venom of T. longissimus, which is believed to be fairly toxic.

Venom glands of Toxicocalamus snakes are quite long, with some species, like T. buergersi, having glands that extend backwards into the body cavity.

The venom glands of these snakes are a notable feature, allowing them to produce a significant amount of venom.

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Many species of Toxicocalamus are localised in their distribution and associated with particular islands or mountain ranges.

Several species are poorly known, with four known only from their holotypes.

Toxicocalamus is endemic to the island of New Guinea, northern coastal offshore islands, and a few nearby archipelagoes.

The species can be found on islands such as Seleo Is. in the Sandaun Province, PNG, and Walis Is. and Tarawai Is. in the East Sepik Province, PNG.

The archipelagoes of Milne Bay Province, including the d'Entrecasteaux Archipelago, Woodlark Is., and the Louisiade Archipelago, are also home to Toxicocalamus species.

Karkar Is. in the Madang Province, PNG, is another location where Toxicocalamus can be found.

Toxicocalamus is not closely related to the Australian Elapidae.

Most species of Toxicocalamus are relatively small, with the largest specimen known being the holotype of the recently described Toxicocalamus ernstmayri, which measures 1.1 m snout-to-vent length (SVL) and 1.2 m in total length (TTL).

Females have longer bodies than males, but much shorter tails.

Most species are under 800 mm in length and several are the thickness of bootlaces.

The second longest species is the holotype of T. grandis, which measures 0.88 m SVL, 0.98 m TTL.

In general, most species are under 0.80 m TTL.

The largest specimen known measures 1.2 m in total length (TTL).

Toxicocalamus is a genus of venomous snakes that has undergone significant revisions in its taxonomy over the years.

The genus was previously divided into several other genera, including Apistocalamus, Apisthocalamus, Pseudapistocalamus, Pseudapisthocalamus, Ultrocalamus, and Vanapina, which are now considered synonyms of Toxicocalamus.

Most of the described species in the genus are poorly known and rarely encountered, with only a few species being widely distributed and commonly encountered.

T. loriae is the most widely distributed and commonly encountered species, accounting for 66% of all Toxicocalamus specimens in museum collections.

T. loriae is frequently encountered in the Highlands, particularly in village gardens along the Wahgi River valley of Simbu Province, PNG.

The next most frequently encountered and widely distributed species are T. preussi and T. stanleyanus.

The remaining species in the genus are much less well known and localised in distribution, with some species being known from only a few specimens.

Here are the 12 species currently recognised in the genus Toxicocalamus: