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Astacopsidrilus hibernicus sp. nov. (Phreodrilidae, Oligochaeta, Annelida) from Irish peatlands

Kapitel i bok
Författare R. M. Schmelz
Mårten Klinth
R. Wisdom
T. Bolger
Publicerad i PROCEEDINGS OF THE 14TH INTERNATIONAL SYMPOSIUM ON AQUATIC OLIGOCHAETA
Sidor 34-44
ISBN 978-1-77670-869-7
Publiceringsår 2020
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 34-44
Språk en
Länkar dx.doi.org/10.11646/zoosymposia.17....
Ämnesord Clitellata, Irish fauna, taxonomy, Enchytraeidae, enchytraeidae oligochaeta, clitellata phreodrilidae, mitochondrial, terrestrial
Ämneskategorier Biologiska vetenskaper

Sammanfattning

The discovery of a large and flourishing population of Phreodrilidae in terrestrial peatlands in northwest Ireland was surprising on two counts: these oligochaete worms are usually aquatic and most of the species occur in the Southern Hemisphere. The phreodrilids were discovered in a project that targeted Enchytraeidae, therefore methods adapted to the investigation of enchytraeids could be applied, including the study of living animals and properly fixed whole mounts. DNA sequencing was also performed. All worms identified here belong to one species, new to science, and placed in the genus Astacopsidrilus, because of the ventral position of the spermathecal pores and the opening of the female funnels inside the spermathecal vestibule. Astacopsidrilus hibernicus sp. nov. is mainly distinguished by thick segmental cushions of epidermal gland cells on the dorsal side of the posterior body half. Male sexual organs and spermathecae are comparatively small and without the oftenobserved bizarre modifications common in species of this family. DNA sequencing yielded a fragment of the 16S rRNA gene. This is the first description of a phreodrilid species from Europe; the few previous recordings of this family in Ireland and the United Kingdom had been left unidentified.

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