Etheridge (1970) restricted the type locality for Lacerta plica Linnaeus to the vicinity of Paramaribo, Suriname, designating NRM.112 as the lectotype. Hoogmoed (1973) further restricted the locality to the confluence of the Cottica River and Perica Creek, Suriname. However, the collared treerunner, Plica plica, is known from the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela, as well as the islands of Trinidad and Tobago, and including the Bocas Island group Additionally, two specimens collected in the 19th century in the British Museum with the locality data “Grenada.”
Of the four species of Plica currently recognized only P. umbra lacks tufts of spines on the neck; and it has 43–69 scales around mid-body. Plica lumaria is black, the superciliaries are directed laterally, it lacks clusters of spines on the fold below the auditory meatus, and it has 141–156 rows of scales around mid-body and 27–33 lamellae under the fourth toe. Plica pansticta has 143–164 scales around mid-body and 31–39 lamellae under the fourth toe. However, P. plica (sensu Etheridge 1970) has 92–202 scales around mid-body; 21–35 lamellae on the fourth finger and 28–45 lamellae on the fourth toe. The polytypic P. plica has been the subject of ecological, morphological, and phylogenetic studies.
Murphy and Jowers (2013) took another look at Plica plica and uncovered multiple species that have been overlooked. While they focused their work on noethern South America, they did examine specimens from across the distyribution of Plica plica and estimate it contains at least 10 species, four of which are described in the new paper published in ZooKeys.
Murphy JC, Jowers M. 2013. Treerunners, cryptic lizards of the Plica plica group (Squamata, Sauria, Tropiduridae) of northern South America. ZooKeys