Assessor(s): Hollingsworth, B. & Frost, D.R.. Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team). Justification. Digital Morphology account of the Baja worm lizard, Bipes biporus, featuring CT- generated animations of the skull. The worm lizard Bipes biporus is an amphisbaenian, a type of elongate burrowing reptile that is often pink and wormlike in appearance. Bipes is the only .

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The species only breeds underground. However, this unique ear structure may be important for locating prey above the surface. By using this site, you agree to the Terms of Use and Privacy Policy.

Due to its secretive lifestyle, there has been little research done on the average lifespan of B. Because Bipes biporus is a burrowing species, data are difficult to collect regarding the depths that they are found, and the average and maximum depths in the soil that they inhabit is unknown. The three species of Bipedidae have small, powerful forelimbs that are specialized for burrowing. It is one of four species of amphisbaenians that have legs.

Bipes biporus | The Reptile Database

The importance of this highly specialized structure is not completely understood for this otherwise rather primitive species. Copeia biporu, 2: Glossary Nearctic living in the Nearctic biogeographic province, the northern part of the New World. Bipes biporus plays a role in the ecosystem as a predator on terrestrial or burrowing invertebrates. Although recent gene phylogenies seem to do so, they also differ radically from any phylogeny based on the phenotype, especially for the most ancient crown squamate divergences that occurred during the latter half of the Mesozoic.


The ADW Team gratefully acknowledges their support. Bipes biporus can be identified by its small, ossified head, a cylindrical body covered with scales in a pattern of vertical rings annuliand two preanal pores.

Their range extends throughout the southern half of the Baja California peninsula, west biporuus the Peninsula Ranges. This page serves supplemental imagery for a paper entitled Assembling the Squamate Tree of Life: Energetics of Concertina Locomotion in Bipes biporus Reptilia: In contrast to the middle ear structure of most amphisbaenians, the stapes and cartilaginous extracolumella of Bipes biporus are connected by fibrous tissue to a deep fold on the skin of the neck, apparently making B.

It uses its autotomous tail as an escape tatic for predators. The Mexican mole lizard B. Views Read Edit View bopes. In dune areas vegetation is also sparse and conditions are dry.

Mexican mole lizard

All species in the family Bipedidae exhibit tail autotomy, but they are unable to regenerate their tails. The species within the family Bipedidae differ from other Amphisbaenians in that they have forelimbs. Breeding— Longevity and Inventory Current January 1, Grismer, ; Papenfuss, Biogeographic Regions nearctic native neotropical native Habitat The distribution of Bipes biporus reflects the type of environment it inhabits. bioorus

When constructing and extending the underground tunnels, B. Mexican Mole Lizards build intricate burrowing systems that run horizontally right below the surface of the soil. Neotropical living in the southern part of the New World. Funding by NSF Comments. Accessed December 31, at https: In terms of locomotion, B. Like all other amphisbaenians, this burrowing species only surfaces at night or after heavy rain. Grismer, ; Papenfuss, Reproduction No studies have been done to determine the type of blporus system that Bipes biporus may use.

Mexican Mole Lizards may act as a control on certain pest population by consuming numbers of mites, insects, and their larvae. This species is oviparous and the females lay one to four eggs in July. University of California Biprs. Accessed December 17, at http: This structure is likely most effective at intercepting air-borne sounds. Positive Due to the large number of insects and other small invertebrates that Bipes biporus feeds on, Mexican Mole Lizards undoubtedly play a role in controlling the populations of their prey.


Because females do not reach sexual maturity until roughly 45 months of age and only reproduce every other year, average life expectancy must exceed this point. This is due to the higher likelihood of older animals coming into contact with a predator at some point in their lives. Mexican Mole Lizards do not exhibit sexual dimorphism, blpes sexual identity can only be determined by looking at the gonads.

Papenfuss, ; Slavens and Slavens, Mexican mole lizard Conservation status. Due to the burrowing lifestyle of B. Our study relied on traditionally prepared specimens as well as high-resolution computed tomography scans that afforded unprecedented access to the cranial anatomy of Squamata.

This lizard article is a stub. Losing a part of the tail while burrowing can plug up the hole behind it, giving it time to escape from any kind of predator that might be chasing it down.

Help us improve the site by taking our survey. Bipes biporus can be described as an opportunistic carnivore. These lizards would seem to have at least some ability to adapt to changing environments.