Electronic Supplement 5
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Organisms
Diversity & Evolution 5 (2005) Electronic Supplement 5 |
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Rüdiger M. Schmelz, Rut Collado:
Fridericia larix sp.
nov. (Enchytraeidae, Oligochaeta) from Irish soils.
print version: Org. Divers. Evol. 5(1): 85-88. 2005 (extended
abstract)
electr. suppl.:
Part 1. Full article. pdf-format, 532 KB
Part 2. List of valid
Fridericia species with 2 diverticula per spermatheca.
pdf-format, 95 KB
Part 3. List of
Fridericia species presently known from Ireland. pdf-format, 35 KB
Abstract:
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), but it was not included in that study. 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 (Fig. 1b, "lc XVI"), (10) the length ratio of
spermatozoa to spermatozoal nuclei (6:1 - 7:1), and (11) a wavy inner surface
in parts of the epithelium of the spermathecal ampulla (Fig. 1i, arrow).
Key words: Taxonomy; New species; Ireland; Biodiversity; Soil biology
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