Pella glooscapi , a new rove beetle , and new records of aleocharines from Nova Scotia , Canada ( Coleoptera , Staphylinidae )

A new aleocharine rove beetle, Pella glooscapi Klimaszewski and Majka sp. n., from Nova Scotia, Canada, is described and illustrated. Data on bionomics and distribution are provided. A short diagnosis, description, colour body image, and black and white genital images are also provided. It appears to be closely related to P. criddlei (Casey). Pella loricata (Casey), Zyras obliquus (Casey), and Dalotia coriaria (Kraatz) are newly recorded from Nova Scotia, and for Atlantic Canada as a whole. ZooKeys 22: 35–44 (2009) doi: 10.3897/zookeys.22.95 www.pensoftonline.net/zookeys Copyright Her Majesty the Queen in Right of Canada. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Launched to accelerate biodiversity research A peer-reviewed open-access journal


Pella glooscapi, a new rove beetle, and new records
of aleocharines from Nova Scotia, Canada (Coleoptera, Staphylinidae)

Introduction
Pella Stephens (1835) is a myrmecophilous genus belonging to the aleocharine tribe Lomechusini Fleming (Coleoptera, Staphylinidae).It is represented by 48 Palaearctic species (including China and northern states of India) and 10 Nearctic species, of which eight, including the one described herein, occur in Canada (Klimaszewski et al. 2005;Maruyama 2006;Hlaváč, pers. comm.).Species of this genus are mainly associated with the ant species of the genus Lasius (subgenus Cautolasius, Dendrolasius, Chthonolasius, and Lasius), and occasionally with Formica, Liometopum, and Tapinoma (Klimaszewski et al. 2005).Th e main goal of this contribution is to describe and document a new species, Pella glooscapi Klimaszewski & Majka, sp. n., recently discovered in Nova Scotia, and to publish new Nova Scotia provincial distribution records for Pella loricata (Casey 1894), Zyras obliquus (Casey, 1894), and Dalotia coriaria (Kraatz, 1856), an adventive Palaearctic species.Klimaszewski & Majka, sp. n., and three P. loricata were found in a highbush blueberry (Vaccinium corymbosum L., Ericaceae) fi eld in Nova Scotia, Canada.All specimens were dissected.Th e genital structures were dehydrated in absolute alcohol and mounted in Canada balsam on celluloid microslides and pinned with the specimens from which they originated.Th e photographs of the entire body and the genital structures were taken using an image processing system (Nikon SMZ 1500 stereoscopic microscope; Nikon Digital Camera DXM 1200F; and Adobe Photoshop software).

Seven adults of Pella glooscapi
Terminology mainly follows that used by Klimaszewski et al. (2005) and Maruyama (2006).Th e ventral part of the median lobe of the aedeagus is considered to be the part of the bulbus containing the foramen mediale, the entrance of the ductus ejaculatorius, and the adjacent venter of the tubus; the opposite side is referred to as the dorsal part.Etymology.Th e name of this new species is derived from the name Glooscap, a mythical creator and cultural hero of the Wabanaki native peoples (the Abenaki, Mi'kmaq, Penobscot, Passamaquoddy, and Maliseet).According to the Mi'kmaq legend, when Glooscap slept, Nova Scotia was his bed and Prince Edward Island his pillow.Glooscap was the source of early environmental myths, teaching hunters that those who kill too much would destroy the world he created.According to legend, Glooscap inhabited the region where Pella glooscapi has been found.He supposedly created the neighbouring Five Islands in the Bay of Fundy by throwing stones at a giant beaver that built a dam to fl ood his medicine garden in Advocate.Accordingly we name this new species in honour of the rich mythology of the people of the Wabanaki Confederacy.

Depository abbreviations
Diagnosis.Pella glooscapi is similar in general appearance to P. loricata but may be easily distinguished by the uniformly black body (except for tarsi and basal parts of antennae), more robust antennae (Figs. 1, 2), and diff erently shaped median lobe of aedeagus with broad and sinuate tubus in lateral view (Fig. 4) and the shape of spermatheca (Fig. 8).Th e closest known relative of this species would appear to be P. criddlei (Casey 1911), from which it may be distinguished by the black body and diff erently shaped male genitalia (Figs.3-5).Th e latter two species have an almost identical spermatheca.Th is and other Pella species may readily be distinguished from members of the genus Drusilla by their lack of a distinct neck, and from the majority of Myrmoecia species by lacking abdominal trichomes and the characteristic tuberosities on the 2 nd and 3 rd visible abdominal tergites (Klimaszewski et al. 2005).
Bionomics.Adults were collected in June, July, August, and September in a highbush blueberry fi eld.Th e area is one of mixed highbush and lowbush blueberry fi elds and re-growing old fi elds, with neighbouring mixed forests and a beaver pond.
Distribution.Known only from Nova Scotia, Canada.
Comments.In Klimaszewski et al. (2005), Pella glooscapi keys out to couplet 12, which is modifi ed as follows to include the new species:
Zyras obliquus is a widely distributed North American species recorded by Klimaszewski et al. (2005) from British Columbia, Alberta, Manitoba, Ontario, and Québec in Canada and from Michigan, Missouri, New Hampshire, New York, and Oregon.We herein provide the fi rst record of Z. obliquus from Nova Scotia.
Dalotia coriaria is a cosmopolitan species that is adventive in many parts of the world including Europe, east Africa, Madagascar, New Zealand, Galapagos Islands (Benick and Lohse 1974;Pace 1999;Sivasubramaniam et al. 1997;Klimaszewski and Peck 1998), and North America (Klimaszewski et al. 2007).In Canada it has previously been recorded from Ontario and Alberta (Klimaszewski et al. 2007;Gouix and Klimaszewski 2007), and in the United States from California, Florida, Louisiana, Massachusetts, New Jersey, and New York (Moore and Legner 1975;Muona 1984;Frank 1980;Gusarov 2003).Th is species is herein newly recorded from Nova Scotia.

Discussion
Th e addition of Pella glooscapi, P. loricata, and Z. obliquus to the faunal list of Nova Scotia substantially increases our knowledge about the myrmecophilous aleocharines found in the region.Previously Majka and Klimaszewski (2008a) reported Drusilla canaliculata (Fabricius, 1787) from Nova Scotia and Majka and Klimaszewski (2008b) added Xenodusa refl exa (Walker) to the provincial list.Drusilla canaliculata is a suspected myrmycophage while X. refl exa is a myrmecophile; both are members of the Lomechusini.Th e status of D. canaliculata as a myrmecophage remains to be verifi ed.Th is species is frequently found in riparian habitats (R. Webster, pers. com.).Clearly, the myrmecophilous fauna of Nova Scotia is much more diverse than previously known.
Further research on the distribution, bionomics, and associated ant species of these species in the region is warranted.
Dalotia coriaria is the 88 th species of adventive staphylinid to be recorded in the Maritime Provinces, and the 77 th from Nova Scotia (Majka and Klimaszewski 2008b).Th e very high proportion of adventive species found in this region is apparent when one considers that of the 38 adventive aleocharines recorded by Gouix and Klimaszewski (2007) in Canada and Alaska, 31 (82%) are found in the Maritime Provinces.Majka and Klimaszewski (2008a) have discussed the diff erent modes of introduction and dispersal of adventive Staphylinidae in the region.