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A beautiful species of tree iguana redescribed 179 years after its discovery

Date:
April 23, 2013
Source:
Pensoft Publishers
Summary:
The tree iguana, Liolaemus nigromaculatus, was the second species of the genus Liolaemus to be described and the nominal species of the group nigromaculatus. However, since its description, no scientific study further clarified the identity of this engaging species or its type locality. A recent study by Chilean biologists clarifies the mysteries around this tree iguana, characterizing the species and its dwelling areas.

This image shows Liolaemus atacamensis a sister tree iguana species from the Liolaemus genus
Credit: Jaime Troncoso-Palacios

Tree iguanas (Liolaemus) are one of the most diverse genus of lizards in the world with 230 described species. Within these, Liolaemus nigromaculatus -- the second described species of the genus Liolaemus -- is usually mentioned in field guides, project baselines, scientific articles, reviews and even is the nominal species of the lizard group nigromaculatus... but always the same question is repeated: Which is this species and which is its type locality?

After a long and comprehensive investigation, two Chilean biologists, Jaime Troncoso-Palacios, Universidad de Chile and Carlos F. Garin, Pontificia Universidad Catσlica de Chile, clear the mysteries around the species, demonstrating that the tree iguana L. nigromaculatus was in fact described with a juvenile male of the species, currently known as L. bisignatus. This specimen was collected in Chile by the doctor and naturalist Franz Julius Ferdinand Meyen on his journey around the world during 1830-1832. Although he describes in detail his journey in one of his books, peculiarly this information was never used in an attempt to clarify the provenance of the species. In fact, there is currently broad consensus that the type locality is Huasco (northern Chile), a locality never visited by Meyen!

"For first time, we have been able to identify the area in which Meyen collected L. nigromaculatus. We have established through Meyen's own writings and the study of the species of Liolaemus that inhabit in the localities that he visited that the tree iguana L. nigromaculatus was collected in the transect or surroundings between Puerto Viejo and Copiapσ, in Atacama (Chile)," explains Jaime Troncoso-Palacios.

For the characterization of the holotype of L. nigromaculatus, the authors used high resolution digital photographs provided by Mr. Frank Tillack (Museum fόr Naturkunde). Use of digital pictures of type specimens has proved to be a powerful and useful tool for clarifying confusing taxonomic issues. The study was published in the open access journal ZooKeys.


Story Source:

The above story is based on materials provided by Pensoft Publishers. The original story is licensed under a Creative Commons License. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jaime Troncoso-Palacios, Carlos F. Garin. On the identity of Liolaemus nigromaculatus Wiegmann, 1834 (Iguania, Liolaemidae) and correction of its type locality. ZooKeys, 2013; 294 (0): 37 DOI: 10.3897/zookeys.294.4399

Cite This Page:

Pensoft Publishers. "A beautiful species of tree iguana redescribed 179 years after its discovery." ScienceDaily. ScienceDaily, 23 April 2013. <www.sciencedaily.com/releases/2013/04/130423102337.htm>.
Pensoft Publishers. (2013, April 23). A beautiful species of tree iguana redescribed 179 years after its discovery. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2013/04/130423102337.htm
Pensoft Publishers. "A beautiful species of tree iguana redescribed 179 years after its discovery." ScienceDaily. www.sciencedaily.com/releases/2013/04/130423102337.htm (accessed October 20, 2014).

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