A Phylogenetic and Taxonomic Review of Croton (Euphorbiaceae s.s.) on Jamaica Including the Description of Croton jamaicensis, a New Species of Section Eluteria

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Abstract:

The greater Caribbean region has played an important role in the early diversification of L. (Euphorbiaceae s.s.). Jamaica is also important to taxonomy because several of the earliest described species were based on material from the island. The Jamaican species of are found in five distinct clades indicating that there were at least five separate over-water dispersal events of the genus to the island. (section Griseb.), a new species endemic to limestone hills along the southern coast of Jamaica, is described and illustrated. The species is phylogenetically most closely related to Sw. and Müll. Arg., both also endemic to Jamaica. Several lectotypifications and novel synonymies are required to clarify the taxonomy of the species of that have been described from Jamaica, some of which are widespread in the region.

Spanish
La región del Caribe ha jugado un papel importante en la diversificación inicial de Croton L. (Euphorbiaceae s.s.). Jamaica también es importante para la taxonomia de Croton dado que varias de las primeras especies descritas fueron basadas en material de la isla. Las especies Jamaicanas de Croton se encuentran en cinco clados distintos indicando que hubieron por lo menos cinco eventos de dispersión sobre agua del género a la isla. Croton jamaicensis (sección Eluteria Griseb.), una nueva especie endémica a colinas de caliza de la costa sur de Jamaica, es descrita e ilustrada. La especie es filogenéticamente mas cercanamente relacionada a C. laurinus Sw. y C. grisebachianus Müll. Arg., ambas también endémicas a Jamaica. Varias lectotipificaciones y nuevas sinonimias son requeridas para clarificar la taxonomia de las especies de Croton que se han descrito de Jamaica, algunas de las cuales están ampliamente distribuidas en la región.

Keywords: CARIBBEAN; CROTON; CROTON JAMAICENSIS; EUPHORBIACEAE; JAMAICA; SECTION ELUTERIA

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1600/036364409787602203

Publication date: January 1, 2009

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