Arrhyton Günther, 1858

Hedges, Blair, Couloux, Arnaud & Vidal, Nicolas, 2009, Molecular phylogeny, classification, and biogeography of West Indian racer snakes of the Tribe Alsophiini (Squamata, Dipsadidae, Xenodontinae), Zootaxa 2067, pp. 1-28: 20

publication ID

10.5281/zenodo.187018

persistent identifier

http://treatment.plazi.org/id/674E87DD-F74B-FFEE-FF36-94C0CD1EBD1E

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scientific name

Arrhyton Günther, 1858
status

 

Genus Arrhyton Günther, 1858 

Type species. Arrhyton taeniatum Günther, 1858: 244  .

Diagnosis. See diagnosis for the subtribe Arrhytonina.

Content. Eight species are included in the genus ( Table 1).

Distribution. The genus is distributed throughout Cuba ( Fig. 2View FIGURE 2).

Remarks. Species of Arrhyton  ( Fig. 3View FIGURE 3 G) are small (448 mm, maximum SVL) racers. An informal classification of Cuban Arrhyton  was based on color pattern and scalation, especially ventral and subcaudal counts ( Schwartz & Garrido 1981; Hedges & Garrido 1992). The most distinct species, morphologically, is A. taeniatum  , because it lacks a loreal scale, has an enlarged rostral (presumably related to semi-fossorial habits), and has a boldly striped pattern. It was placed in its own species group ( taeniatum  Group) and the sequence evidence ( Figs. 1View FIGURE 1. A and 4View FIGURE 4. A), although missing A. ainictum  , shows it to be the sister group of all other species of Arrhyton  . The three species having high ventral scale counts and long tails ( A. dolichura  , A. procerum  , and A. tanyplectum  ), were placed together in the dolichura  Group, also supported by DNAAbout DNA evidence ( Fig. 1View FIGURE 1. A). The remaining species, with lower ventral counts and relatively short tails, were placed in a separate group, the vittatum  Group, though this is resolved (without maximal support) as paraphyletic in our phylogeny.

DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Squamata

Family

Colubridae