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Five new species of Oncholaimellus (Oncholaimidae: Nematoda) from north-east Brazil, with an emended diagnosis and an updated key to the genus

Published online by Cambridge University Press:  11 March 2014

Patrícia Fernandes Neres ,
Maria Cristina da Silva ,
Geruso Vieira de Miranda-Júnior ,
Verônica Fonsêca-Genevois  and
André Morgado Esteves
Patrícia Fernandes Neres
Affiliation:
Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil
Maria Cristina da Silva
Affiliation:
Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil
Geruso Vieira de Miranda-Júnior
Affiliation:
Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil
Verônica Fonsêca-Genevois
Affiliation:
Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil
André Morgado Esteves*
Affiliation:
Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil
*
Correspondence should be addressed to: A.M. Esteves, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento Zoologia, Cidade Universitária, Recife, Pernambuco 50670-901. Brazil email: andresteves.ufpe@gmail.com
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Abstract

Five new species of Oncholaimellus are described. They were found in macrofauna samples from the continental shelf in the Potiguar Basin, north-east Brazil. Cuticular pores with a sclerotized outline associated with a gland were observed in some species. Oncholaimellus multiporus sp. nov. is differentiated from other species by the presence of cuticular pores of different sizes; the smaller pores are abundant and give an appearance of ornamentation. Oncholaimellus intersexus sp. nov. and O. distortus sp. nov. are similar, but differ in the size of the external labial and cephalic setae compared to the corresponding diameter, the presence of the cuticular pores and the tail shape. Oncholaimellus paulus sp. nov. and O. sineporus sp. nov. are similar, although features such as the external labial and cephalic setae size compared to the corresponding diameter and the cuticular pores differentiate between them.

Keywords

marine nematodestaxonomyspecies descriptionBacia Potiguarsouth-west Atlanticcontinental shelf
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 94 , Issue 4 , June 2014 , pp. 703 - 727
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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