Antechinus arktos, Dyck, 2014

Dyck, Steve Van, 2014, The Black-tailed Antechinus, Antechinus arktos sp. nov.: a new species of carnivorous marsupial from montane regions of the Tweed Volcano caldera, eastern Australia, Zootaxa 3765 (2), pp. 101-133: 106-109

publication ID

http://dx.doi.org/10.11646/zootaxa.3765.2.1

publication LSID

lsid:zoobank.org:pub:E7DDABDA-5DA6-4309-A26F-121FCB030EEE

DOI

http://doi.org/10.5281/zenodo.5046086

persistent identifier

http://treatment.plazi.org/id/039D2A47-0947-3E30-C6F8-102CFB085165

treatment provided by

Felipe

scientific name

Antechinus arktos
status

sp. nov.

Antechinus arktos   , sp. nov.

(Black-tailed Antechinus   )

Etymology. The species epithet refers to the bear-like appearance of the holotype ( arktos   is Greek for bear): very long guard hairs cover the body and the animal has a tendency to rear on its hind legs sniffing the air when disturbed, rather than the typical acrobatic leaping behaviour of most congeners. The common name refers to the evenly black-coloured tail of the species, especially when compared to the dark brownish tail of A. swainsonii   .

Material. HOLOTYPE: QM JM 20009 (field number N86204 View Materials ), adult female, complete skull and dentary extracted. Body is deep frozen (destined for long-term storage as a puppet skin). DNA sample (liver) is stored in 95% ethanol and frozen. The specimen was collected on 28 May 2013 by A.M.Baker, T. Y. Mutton, H.B. Hines and J. Rowland in an Elliott trap baited with peanut butter, oats and bacon.  

PARATYPE: The paratype specimen, QM JM20010, was collected 28 May 2013 by A.M.Baker, T. Y. Mutton, H. Hines and J. Rowland from Bilbrough Lookout, Springbrook National Park , SEQ 28° 14´03˝ S 153° 17´23˝ E. This specimen was photographed live by Qld Museum photographer Gary Cranitch prior to accession into the Qld Museum collection (see Figure 4 View FIGURE 4 ). Figure 5 View FIGURE 5 shows features of the skull, dentary and teeth of the holotype specimen GoogleMaps   .

REFERRED SPECIMENS: ( JM prefixes are from the Queensland Museum; M prefixes are from the Australian Museum). These specimens were formalin-fixed and old so genetics was not possible. For the following adults skull morphology was used to confirm species identification as A. arktos   : males JM834   O’Reilly’s Guest House , SEQ 28° 13´S 153° 07´E; JM835 GoogleMaps   Binna Burra Lodge , SEQ 28° 12´S 153° 11´E; JM836 GoogleMaps   Dave’s Creek Country Binna Burra , SEQ 28° 13´S 153° 13´E; JM2281 GoogleMaps   O’Reilly’s Guest House, SEQ 28° 14´S 153° 08´E (all preceding localities are within or immediately adjacent to Lamington NP) GoogleMaps   ; M20605 View Materials   Eastern Border Ranges NP, NENSW 28° 23´S 153° 04´E GoogleMaps   , females: JM1595   Warrie NP (now within Springbrook NP)   , SEQ 28° 13´S 153° 16´E; JM7949 GoogleMaps   Eastern Border Ranges NP, NENSW 28° 25´S 153° 07´E GoogleMaps   . In addition two juvenile specimens are assigned to A. arktos   on the basis of external morphology: JM1594   National Park 752 (now within Springbrook NP) 28° 14´S 153° 16´E, SEQ GoogleMaps   and M20606 View Materials Eastern Border Ranges , NENSW 28° 22´S 153° 06´E GoogleMaps   .

Holotype locality. A small gully near Best of All Lookout , Mount Mumdjin, Springbrook National Park, south-east Queensland, Australia (28° 14´29.6˝ S 153° 15´50.6˝ E. Datum: GDA 94), 950m altitude. GoogleMaps  

Distribution. All specimens are from upland, high rainfall vegetation communities of the Tweed Shield Volcano caldera in south-east Queensland and north-east New South Wales. The species is currently only known from Springbrook NP, Lamington NP and Border Ranges NP (eastern section only). The following museum specimens from north-east New South Wales were registered as A. swainsonii   but on re-examination by us were clearly not A. arktos   or A. swainsonii   : Australian Museum M31942 View Materials Grafton (reidentified as A. flavipes   ); Australian Museum M29214 View Materials Conglomerate State Forest (reidentified as A. stuartii   ); Australian Museum M12631 View Materials Coffs Harbour (reidentified as A. stuartii   ); Australian National Wildlife Collection M24077 View Materials Tooloom (reidentified as A. stuartii   ). There are published (e.g., Dickman, 1982) and unpublished records (e.g., Atlas of Living Australia, Atlas of NSW Wildlife) of A. swainsonii   sensu lato between Ebor (type locality for A. s. mimetes) and the uplands of the Tweed caldera. However, without specimens and/or genetic samples we are unable to comment further on the identity of these records. Workers in this region are encouraged to retain voucher and tissue specimens to enable a better understanding of the distribution of A. arktos   and A. s. mimetes.

Diagnosis. Summary of external differences amongst congeners. Antechinus arktos   differs clearly from all other antechinus species, in having a combination of large-bodied, very shaggy and black-tailed appearance. A. arktos   is more vibrantly coloured than A. swainsonii   . A. s. mimetes is more uniformly deep brown-black to grizzled grey-brown from head to rump, with brownish (clove brown – raw umber) hair on the upper surface of the hindfoot and tail, whereas A. arktos   is more colourful, having a marked change from greyish-brown head to orange-brown toned rump, fuscous black on the upper surface of the hindfoot and dense, short fur on the evenly black tail. Further, there is no distinct eye-ring but A. arktos   has marked orange-brown fur on the upper and lower eyelid, cheek and in front of the ear and very long guard hairs all over the body, giving it a distinctively shaggy appearance; these characters, in specimens where they exist, are more subtle in A. swainsonii   .

Summary of craniodental differences amongst congeners. A. arktos   skulls are strikingly different to all subspecies of A. swainsonii   . A. arktos   are markedly larger than A. s. mimetes and A. s. swainsonii   (Tasmania) for a range of craniodental measures, in particular: breadth across the snout, but with shorter anterior palatal vacuities and larger inter-palatal vacuity distance. Compared to all A. swainsonii   subspecies, A. arktos   skulls are most similar in size to A. s. insulanus from Grampians NP, Victoria. Nevertheless, there are a range of skull characters that differ between A. arktos   and A. s. insulanus: A. arktos   tend to have smaller upper second molar teeth but broader skulls, shorter anterior palatal vacuities and longer posterior palatal vacuities than A. s. insulanus.

QM

Queensland Museum

T

Tavera, Department of Geology and Geophysics

JM

Jura Museum, Eichstatt