An updated checklist of Canadian and Alaskan Collembola

Abstract

The available literature data on the species diversity and geographical distribution of Collembola in Canada and Alaska is summarized. In total, the checklist covers 541 named species of Collembola. This includes 475 species in 135 genera from 24 families recorded from Canada, as well as 241 species in 75 genera from 19 families reported from Alaska. For each species the current name, basionym with a full reference, records for different provinces and territories with their authorships, and general distributional ranges are given. Taxonomic remarks have been added when necessary. The checklist is based on 536 references (including 262 with Canadian records) published up to May 2018 and on a number of publicly available online resources.

Description of Hypogastrura ellisi sp. n. with notes on H. tethyca Ellis and the trybomi group (Collembola, Hypogastruridae)

“…Terminology for the description follows that given in Fjellberg (1984, 1999), Babenko et al (1994) and Thibaud et al (2004).…”

“…Interestingly, subsequent studies (Fjellberg 1985, Babenko et al 1994, Babenko and Fjellberg 2006) showed that H. trybomi sensu Christiansen and Bellinger (1980) rather referred to H. oregonensis . Afterwards, Babenko et al (1994) supplemented the Christiansen and Bellinger (1980) definition with new essential features and enlarged the group by adding species recorded in Palearctic: H. maxillosa Babenko, 1994 and H. tethyca .…”

“…The description (Ellis 1976) and redescription (Babenko et al 1994) of H. tethyca are highly informative; however, the examination of the types and other material allow us to add some more details. Hypogastrura tethyca has 10–18 granules between setae p 1 on Abd.…”

“…Then, Babenko et al (1994), based on specimens from Azerbaijan, put this species into the trybomi group. Although this concept seems well justified, H. tethyca , having a labrum with delicate apical papillae and tibiotarsi with long and clavate tenent hair, occupies a rather isolated position within the group.…”

“…Looking for phylogenetic relationships between them, and for practical reasons, the genus has been divided into some species groups based on morphology (Yosii 1960, Christiansen and Bellinger 1980, Babenko et al 1994, Skarżyński 2009). Presently, nine groups are used in the taxonomy of the genus: crassaegranulata , manubrialis , monticola , nivicola , packardi, sahlbergi , socialis , trybomi , and viatica .…”