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Pristina silvicola and Pristina terrena spp. nov., two new soil-dwelling species of Naididae (Oligochaeta, Annelida) from the tropical rain forest near Manaus, Brazil, with comments on the genus Pristinella

Published online by Cambridge University Press:  01 August 2000

Rut Collado  and
Rüdiger M. Schmelz
Rut Collado
Affiliation:
Universidade da Coruña, Departamento de Bioloxía Animal e Bioloxía Vexetal, Campus da Zapateira s/n, E-15071 A Coruña, Spain
Rüdiger M. Schmelz
Affiliation:
Universität Osnabrück, FB 5, Biologie/Chemie, Spezielle Zoologie, D-49069 Osnabrück, Germany
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Abstract

Pristina silvicola and P. terrena spp. nov. are described from soil samples of the primary rain forest at the Brazilian Agroforestry Research Facility near Manaus, Brazil. Living and preserved specimens were studied. The species are among the smallest oligochaetes known (1–1.5 mm long) but they are conspicuous by their brilliant, highly refractile coelomocytes. Pristina silvicola is also described from sexually mature specimens. Its character combination invalidates Pristinella as a genus separate from Pristina. Both genera are reunited as Pristina. Pristina silvicola and P. terrena, species which lack a proboscis, share a character combination that is unique in the genus: stomach absent, first nephridia in segment VII, ventral chaetae uniform with upper tooth not longer than lower. They differ from one another in the shape of the brain and in other details of the chaetae.

Keywords

PristinaPristinellataxonomylive observationspecies descriptions
Type
Research Article
Information
Journal of Zoology , Volume 251 , Issue 4 , August 2000 , pp. 509 - 516
Copyright
© 2000 The Zoological Society of London

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