SciELO - Scientific Electronic Library Online

vol.83 issue2The first Symphytognathidae (Arachnida: Araneae) from Argentina, with the description of a new species of Anapistula from the Yungas mountain rainforestLamotheoxyuris ackerti n. gen., n. comb. (Nematoda: Heteroxynematidae) parasite of Neotoma spp. (Rodentia: Muridae) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista chilena de historia natural

Print version ISSN 0716-078X


DELGADO-BLAS, V. HUGO  and  DIAZ-DIAZ, ÓSCAR. Description of two new species of Malacoceros and Rhynchospio spionids (Polychaeta: Spionidae) from the Grand Caribbean region. Rev. chil. hist. nat. [online]. 2010, vol.83, n.2, pp.249-257. ISSN 0716-078X.

Two new species of spionids are described from the Caribbean Sea, Malacoceros cariacoensis n. sp. from Venezuela and Rhynchospio harrisae n. sp. from Guana in the Virgin Islands, British Virgin Island. Malacoceros cariacoensis n. sp. can be differentiated by the shape of the prostomium, which has two short frontal horns and the posterior portion laterally prolonged into a faintly demarcated, double-looped nuchal organ, extending to the base of setiger 2, a reduction in the size of setiger 1, the absence of body pigmentation, and the number of apical teeth on the hooded hooks. Rhynchospio harrisae n. sp. differs from other species of the genus in that the peristomium is moderately developed with low lateral wings, and the anterior notopodial setae are arranged in two rows with a superior tuft of capillaries. A key to Malacoceros species worldwide is provided.

Keywords : Caribbean; Malacoceros; Rhynchospio; Spionidae; taxonomy.

        · abstract in Spanish     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License