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Mexican mole lizard
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Bipedidae
Genus: Bipes
Species:
B. biporus
Binomial name
Bipes biporus
(Cope, 1894)
Synonyms

The Mexican mole lizard (Bipes biporus), commonly known as the five-toed worm lizard, or simply as Bipes, is a species of amphisbaenian, which is endemic to the Baja California Peninsula. It is one of four species of amphisbaenians that have legs. It should not be confused with the axolotl, a salamander (Ambystoma mexicanum), which is usually called ajolote in Spanish.

Description

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They are pink, lizard-like reptiles, 18–24 cm (7.1–9.4 in) snout-to-vent length and 6–7 mm (0.24–0.28 in) in width, that live for one to two years. Their skin is closely segmented to give a corrugated appearance, and like earthworms, their underground movement is by peristalsis of the segments. The forelegs are strong and paddle-like, while the hindlegs have disappeared, leaving behind only vestigial bones visible in X-rays.

Reproduction

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This species is oviparous and the females lay one to four eggs in July. The species only breeds underground. The eggs hatch after two months.

Geographic range

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The Mexican Mole lizard (B. biporus) is found in the states of Baja California, Baja California Sur, Guerrero and Chiapas, in Mexico.

Behavior

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Like all other amphisbaenians, this burrowing species only surfaces at night or after heavy rain.

Diet

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It is an opportunist carnivore and eats ants, termites, ground-dwelling insects, larvae, earthworms, and small animals including lizards. It usually pulls its prey down to the ground to start its meal.

References

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  1. ^ Stejneger, L., and T. Barbour. 1917. A Check List of North American Amphibians and Reptiles. Harvard University Press. Cambridge, Massachusetts. 125 pp. (Bipes biporus, p. 72.)

Further reading

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  • Cope, E.D. 1894. On the Genera and Species of Euchirotidæ. American Naturalist 28: 436-437. (Euchirotes biporus)
  • Stebbins, R. C. 2003. A Field Guide to Western Reptiles and Amphibians, Third Edition. The Peterson Field Guide Series. Houghton Mifflin. Boston and New York. xiii + 533 pp. ISBN 0-395-98272-3 (paperback). (Bipes biporus, pp. 428-429 + Plate 55 + Map 200.)
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