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

Zeanillus nunni , sp.n.

Figs. 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. 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. 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. 12 G). Ring sclerite with short and markedly transverse handle ( Fig. 14 C).

Female internal genitalia. Goncoxite 2 with short ensiform setae ( Fig. 15 C). Spermatheca sclerotized, elongate, with four compartments ( Fig. 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. 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 .

Figures

FIGURE 7. Digital images of pterothorax and first abdominal ventrites, ventral aspect, of Zeanillus species. A— Z. phyllobius; B— Z. punctigerus; C— Z. nunni; D— Z. pallidus; E— Z. pellucidus; F— Z. brouni; G— Z. lescheni; H— Z. montivagus; I— Z. nanus. Legend: ipa—intercoxal process of abdominal ventrite 2; mes—metendosternite; mte—metanepisternum; mtvmetaventrite; v 1 – v 2 — abdominal ventrites 1 – 2. Scale bars = 0.2 mm.

FIGURE 11. Digital images of habitus of Zeanillus species, dorsal aspect. A— Z. phyllobius (NZ, Canterbury, Coopers Knob); B— Z. punctigerus (NZ, Canterbury, Sharplin Falls); C— Z. nunni (NZ, Otago, Highway 87 at Rocklands Road); D— Z. pallidus (NZ, Otago, Taieri Mouth); E— Z. pellucidus (NZ, Otago, Oamaru, Glen Warren Reserve); F— Z. brouni (NZ, Otago, Oamaru, Glen Warren Reserve); G— Z. carltoni (NZ, Otago, Mount Watkin); H— Z. lescheni (NZ, Otago, Waikaia Forest); I— Z. montivagus (NZ, Otago, North Rough Ridge): J— Z. nanus (NZ, Otago, Pisa Range). Scale bar = 1.0 mm.

FIGURE 12. Line drawings of aedeagus of Zeanillus species. Z. punctigerus (NZ, Canterbury, Sharplin Falls): A—median lobe, right lateral aspect, B—apical part of median lobe, dorsal aspect, C—left paramere, left lateral aspect, D—right paramere, right lateral aspect; Z. nunni (NZ, Otago, Evansdale): E—median lobe, right lateral aspect, F—apical part of median lobe, dorsal aspect, G—left paramere, left lateral aspect, H—right paramere, right lateral aspect; Z. phyllobius (NZ, Canterbury, Ahuriri Scenic Reserve): I—median lobe, right lateral aspect, J—apical part of median lobe, dorsal aspect, K—left paramere, left lateral aspect, L—right paramere, right lateral aspect; Z. pallidus (NZ, Otago, Taieri Mouth): M—median lobe, right lateral aspect, N—apical part of median lobe, dorsal aspect, O—left paramere, left lateral aspect, P—right paramere, right lateral aspect; Z. pellucidus (NZ, Otago, Oamaru, Glen Warren Reserve): Q—median lobe, right lateral aspect, R—apical part of median lobe, dorsal aspect, S—left paramere, left lateral aspect, T—right paramere, right lateral aspect. Legend: ao—apical orifice; bo—basal orifice; ds—dorsal sclerites, of—ostial field. Scale bar = 0.1 mm.

FIGURE 14. Line drawings of ring sclerite of Zeanillus species, male genitalia, dorsal aspect. A— Z. phyllobius (NZ, Canterbury, Ahuriri Scenic Reserve); B— Z. punctigerus (NZ, Canterbury, Orari Gorge); C— Z. nunni (NZ, Otago, Highway 87 at Rocklands Rd); D— Z. pallidus (NZ, Southland, Thomsons Bush); E— Z. pellucidus (NZ, Otago, Oamaru, Glen Warren Reserve); F— Z. nanus (NZ, Otago, Pisa Range); G— Z. montivagus (NZ, Otago, North Rough Ridge); H— Z. brouni (NZ, Otago, Oamaru, Glen Warren Reserve); I— Z. lescheni (NZ, Otago, Waikaia Forest); J— Z. carltoni (NZ, Otago, Mount Watkin). Legend: hd—handle of ring sclerite. Scale bar = 0.1 mm.

FIGURE 15. Line drawings of right ovipositor sclerite, lateral aspect, of Zeanillus species. A— Z. phyllobius (NZ, Canterbury, Ahuriri Scenic Reserve); B— Z. punctigerus (NZ, Canterbury, Sharplin Falls); C— Z. nunni (NZ, Otago, Woodside Glen); D— Z. pallidus (NZ, Otago, Taieri Mouth); E— Z. pellucidus (NZ, Otago, Oamaru, Glen Warren Reserve); F— Z. brouni (NZ, Otago, Oamaru, Glen Warren Reserve); G— Z. carltoni (NZ, Otago, Mount Watkin); H— Z. lescheni (NZ, Otago, Waikaia Forest); I— Z. montivagus (NZ, Otago, North Rough Ridge); J— Z. nanus (NZ, Otago, Balclutha). Legend: es—ensiform seta; gc 1 — gonocoxite 1; gc 2 — gonocoxite 2; lt—laterotergite; ns—nematiform seta. Scale bar = 0.05 mm.

FIGURE 16. Line drawings of spermatheca, spermathecal duct, and spermathecal gland of Zeanillus species. A— Z. phyllobius (NZ, Canterbury, Ahuriri Scenic Reserve); B— Z. punctigerus (NZ, Canterbury, Sharplin Falls); C— Z. nunni (NZ, Otago, Woodside Glen); D— Z. pellucidus (NZ, Otago, Oamaru, Glen Warren Reserve); E— Z. pallidus (NZ, Otago, Taieri Mouth); F— Z. brouni (NZ, Otago, Oamaru, Glen Warren Reserve); G— Z. montivagus (NZ, Otago, North Rough Ridge); H— Z. nanus (NZ, Otago, Balclutha). Legend: sd—spermathecal duct; sg—spermathecal gland; sp—spermatheca. Scale bar = 0.05 mm.

FIGURE 18. Map of southern half of South Island, New Zealand, showing positions of locality records for the species of Zeanillus. A: white circles, Z. phyllobius; green circles, Z. punctigerus; red circles, Z. nunni; blue diamond, Z. pellucidus; green diamond, Z. pallidus. B: white triangles, Z. brouni; green triangles, Z. nanus; red triangles, Z. lescheni; yellow triangle, Z. carltoni; black triangle, Z. montivagus. Elevation scale bars are given in meters.