Fridericia larix sp nov (Enchytraeidae, Oligochaeta) from Irish soils

Autor(en): Schmelz, RM
Collado, R
Stichwörter: biodiversity; Evolutionary Biology; Ireland; new species; soil biology; TAXONOMY; Zoology
Erscheinungsdatum: 2005
Herausgeber: SPRINGER HEIDELBERG
Journal: ORGANISMS DIVERSITY & EVOLUTION
Volumen: 5
Ausgabe: 1
Zusammenfassung: 
A new species of Fridericia (Enchytraeidae, Oligochaeta) is described from soils in Ireland. It was found during sampling campaigns in the framework of a comprehensive taxonomic revision of the genus (Schmelz 2003). Fridericia larix sp. nov., named in reference to the type locality, belongs to the large and taxonomically difficult group of species with two diverticula per spermatheca. It is distinguished from all known congeners by the following combination of characters: (1) a maximum of four chaetae in ventral preclitellar bundles; (2) oesophageal appendages poorly branched; (3) no pharyngeal glands in segment VII; (4) coelomocytes without refractile vesicles; (5) clitellum girdle-shaped, cell distribution alike on all sides; (6) bursal slit of male copulatory organ mainly transverse; (7) no subneural glands; (8) spermathecal diverticula not stalked. Further distinguishing characters are: (9) an asymmetrical arrangement of chaetae in the first lateral postclitellar bundles, with one large chaeta and one small chaeta per bundle, (10) the length ratio of spermatozoa to spermatozoal nuclei (6:1 to 7:1), and (11) a wavy inner surface in parts of the epithelium of the spermathecal ampulla.
ISSN: 14396092

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