Zeanillus nunni, Sokolov, Igor M., 2016

Sokolov, Igor M., 2016, A taxonomic review of the anilline genus Zeanillus Jeannel (Coleoptera: Carabidae: Bembidiini) of New Zealand, with descriptions of seven new species, re-classification of the species, and notes on their biogeography and evolution, Zootaxa 4196 (1), pp. 1-37: 7-8

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Zeanillus nunni


Zeanillus nunni  , sp.n.

Figs. 7View FIGURE 7 C, 11C, 12E –H, 14C, 15C, 16C, 18A

Type material. HOLOTYPE, male, in NZAC, board-mounted, undissected, labeled: / New Zealand DN Trotters Gorge Palmerston 9 Jul 0 6 / Soil sample kanuka/kowhai/mahoe forest /.

PARATYPES (32 specimens, 6 dissected), 6 males and 6 females labeled same as holotype; 1 male labeled: / New Zealand DN Evansdale Glen Evansdale 11 Aug 0 7 / Washed soil sample 40m broadleaf forest by stream /  ; 1 male labeled: / New Zealand DN Evansdale Glen 10 Jun 0 6 / Washed soil sample /  ; 3 males and 3 females labeled: / New Zealand DN Woodside Glen Outram 28 Nov 0 6 / Washed soil sample /  ; 1 male and 2 females labeled: / New Zealand DN Woodside Glen Outram 16 Jun 0 6 / Washed soil sample /  ; 2 males and 1 female labeled: / New Zealand DN Woodside Glen Outram 18 Nov 0 6 / Washed soil sample /  ; 1 male labeled: / New Zealand: DN, Woodside Glen, Outram, 50m, washed soil sample, broadleaf forest J.Nunn 13 Sept 2008 /  ; 3 males labeled: / New Zealand DN State Highway 87 at Rocklands Rd 21 Jun 0 9 / Washed soil sample, remnant tussock /  ; 1 female labeled: / New Zealand: DN, Semple Rd / Caneys Creek Tck, nr Edendale J. Nunn 12 Apr 2008 /  ; 1 male labeled: / New Zealand SL Black Gully Blue Mtns 390m 2 Dec 0 6 / Washed soil sample Nothophagus forest /. 

Specific epithet. The specific epithet is a Latinized eponym in the genitive case, and is based on the surname of John T. Nunn, the collector of the type series of this species.

Type locality. New Zealand, South Island , Otago, Trotters Gorge. 

Recognition. Adults of this species ( Fig. 11View FIGURE 11 C) are practically indistinguishable externally from the adults of Z. phyllobius  and Z. punctigerus  , and are distinguished from the males of those by the structure of male genitalia. From other congeners, adults of Z. nunni  can be distinguished by the characters listed in the subgeneric diagnosis.

Description. Size. Small to medium for genus (SBL range 1.50–1.80 mm, mean 1.65± 0.083 mm, n=20).

Habitus. Body form slightly convex, ovoid, moderately elongate (WE/SBL 0.35±0.010), head of moderate width for genus compared to pronotum (WH/WPm 0.74±0.023), pronotum of moderate width in comparison to elytra (WPm/WE 0.76±0.018).

Color. Body color rufotestaceous, appendages testaceous.

Prothorax. Pronotum moderately long (LP/LE 0.43±0.023) and moderately elongate (WPm/LP 1.29±0.034), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.65±0.059). Width between anterior angles much greater than between posterior angles (WPa/WPp 1.28±0.053).

Elytra. Slightly depressed along suture, comparatively short (LE/SBL 0.49±0.017) and moderately wide (WE/ LE 0.73±0.030). Lateral margins slightly divergent at basal third, subparallel at middle, and evenly rounded to apex in apical third.

Male genitalia. Median lobe ( Fig. 12View FIGURE 12 E) with straight ventral margin and short apex with tapering tip. Sclerites of internal sac united basally, long, almost equal the length between apical and basal orifices. Left paramere with apical constriction ( Fig. 12View FIGURE 12 G). Ring sclerite with short and markedly transverse handle ( Fig. 14View FIGURE 14 C).

Female internal genitalia. Goncoxite 2 with short ensiform setae ( Fig. 15View FIGURE 15 C). Spermatheca sclerotized, elongate, with four compartments ( Fig. 16View FIGURE 16 C). Spermathecal duct short with few coils. Attachments of spermathecal duct and gland to spermatheca close together.

Geographical distribution. This species is known from the eastern foothills of Otago within Dunedin area of Crosby et al. (1998) and the Blue Mountains of Southland ( Fig. 18View FIGURE 18 A, red circles).

Way of life. Specimens were collected from soil in a broad range of habitats: tussocks, Nothofagus  , broadleaf and kanuka/kowhai/mahoe forests.

Relationships. Based on the structure of male genitalia and spermatheca Z. nunni  is postulated to be the sister taxon of Z. phyllobius  + Z. punctigerus  .