Amphisbaena caeca, commonly known as the Puerto Rican worm lizard or blind worm lizard, is a species of worm lizard endemic to Puerto Rico. These animals are vermicular reptiles that live under logs, rocks, and dirt. Other species of Amphisbaenids in the Caribbean include Amphisbaena bakeri, Amphisbaena fenestrata, Amphisbaena schmidti, Amphisbaena xera, and Cadea blanoides.
Amphisbaenids are legless, worm-like reptiles with elongated bodies nearly uniform in diameter. They are covered with ring-like scales similar in appearance to earthworms. They are underground animals, hence the eyes have degenerated to tiny indistinct spots under the rings.
Description Amphisbaena caeca is pinkish-brown on the head and tail, with dark spots on each of the scales found throughout its annuli (body rings), of which there are between 214 and 237 in this species. This helps distinguish it from A. bakeri, whose annuli count is greater. It is one of the two largest amphisbaenids on the island (the other being A. bakeri), measuring up to in snout to vent length (SVL). Like other members of its clade, it has only one median tooth. Because it is somewhat difficult to distinguish its head from its tail, it is sometimes referred to as a "two-headed snake" ("culebra de dos cabezas") by Puerto Rican locals. According to folklore, wearing a live Amphisbaena on the body "helps safeguard pregnancy" while wearing a dead snake "helps rheumatism".
Habits They can be found burrowing in the ground under logs, rocks, old tree stumps, and under termite and ant nests.
Habitat They live in dense woodlands, thickets, and caves.
Geographic range The distribution of this species is the widest of any amphisbaenid in Puerto Rico, being found throughout the central mountainous region of the island up to an elevation of . They have also been found in Isla Vieques, Isla Culebra, and the Virgin Islands. Yet Determined.Html&ttype=detail&pname=El Yunque National Forest- Nature
See also
List of amphibians and reptiles of Puerto Rico List of endemic fauna of Puerto Rico
References
Further reading Boulenger, G.A. 1885. Catalogue of the Lizards in the British Museum (Natural History). Second Edition. Volume II...Amphisbænidæ. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers.) xiii + 497 pp. + Plates I.- XXIV. (Amphisbæna cæca, pp. 445–446.) Cuvier, G. 1829. Le Règne Animal Distribué, d'après son Organisation, pour servir de base à l'Histoire naturelle des Animaux et d'Introduction à l'Anatomie Comparé. Avec Figures desinées, d'après Nature. Nouvelle Édition, Revue et Augmentée. Tome II. [Reptiles] Paris: Déterville. xv + 406 pp. (Amphisbæna caeca, p. 73.) Rivero, J.A. 1978. Los Anfibios y Reptiles de Puerto Rico: The Amphibians and Reptiles of Puerto Rico. San Juan: Editorial de la Universidad de Puerto Rico. 375 pp. . Schwartz, A., and R. Thomas. 1975. A Check-list of West Indian Amphibians and Reptiles. Special Publication No. 1. Pittsburgh, Pennsylvania: Carnegie Museum of Natural History. 216 pp. (Amphisbaena caeca, p. 166.)
External links Caribbean National Forest Kignsnake: The Reptile and Amphibian hobbyist