Zeanillus lescheni, 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 : 28-29

Zeanillus lescheni , sp.n.

Figs. 1 E, 2D, 3G–H, 4E, 5E, 6E, 7G, 8D, 9D, 10JP, 11H, 13E–H, 14I, 15H, 17B, 18B

Type material. HOLOTYPE, male, in NZAC, board-mounted, undissected, labeled: / New Zealand CO Whitecoomb Rd 2km N of Post Office Ck / Washed soil sample, beech forest 25 Apr 0 7 /.

PARATYPES (13 specimens, 4 dissected), 1 male labeled same as holotype; 1 male and 1 female labeled: / New Zealand CO Piano Flat Waikaia Forest 25 Apr 0 7 / Washed soil sample beech forest / ; 3 males and 3 females labeled: / New Zealand CO 2km north of Post Office Ck Waikaia Forest / Washed soil sample, beech forest 25/04/ 0 7 / ; 1 male labeled: / New Zealand CO Waikaia Forest Whitecoomb Rd at Post Office Ck 25 Apr 0 7 / Washed soil sample / ; 2 males labeled: / New Zealand CO Waikaia Forest Whitecoomb Rd at Post Office Ck / Washed soil sample Nothophagus forest 25 Apr 0 7 / ; 1 male labeled: / New Zealand CO Whitecoomb Rd 4km N Post Office Ck / Washed soil sample 25 Apr 0 7 /.

Specific epithet. The specific epithet honors the surname of Richard A.B. Leschen, coleopterist of Landcare Research and Curator of the New Zealand Arthropod Collection, who loaned the specimens of Anillina under his care for this study.

Type locality. New Zealand, South Island, Southland, Waikaia Forest Conservation area .

Recognition. Adults of this species ( Fig. 11 H) are distinguished from other congeners by the characters listed in the species key.

Description. Size. Medium to large for genus (SBL range 1.72–1.98 mm, mean 1.84± 0.080 mm, n=14).

Habitus. Body form slightly convex, ovoid, moderately elongate (WE/SBL 0.37±0.014), head of moderate width for genus compared to pronotum (WH/WPm 0.72±0.015), pronotum rather narrow in comparison to elytra (WPm/WE 0.71±0.017).

Color. Body color rufotestaceous, appendages testaceous.

Prothorax. Pronotum slightly long (LP/LE 0.40±0.009) and moderately elongate (WPm/LP 1.28±0.031), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.52±0.070). Width between anterior angles moderately greater than between posterior angles (WPa/WPp 1.15±0.045).

Elytra. Slightly depressed along suture, comparatively long (LE/SBL 0.53±0.012) and moderately wide (WE/ LE 0.69±0.019). Lateral margins slightly divergent at basal third, subparallel at middle and evenly rounded to apex in apical third.

Male genitalia. Median lobe ( Fig. 13 E) with straight ventral margin and enlarged apex in dorsal projection. Sclerites of internal sac sclerotized, unequal in length, with long, thick ventral and short, narrow dorsal branches, united basally, almost equals to the half of the distance between apical and basal orifices. Left paramere with long apical constriction ( Fig. 13 G). Ring sclerite without visible handle ( Fig. 14 I).

Female internal genitalia. Goncoxite 2 with short ensiform setae ( Fig. 15 H). Spermatheca sclerotized, gigantic, elongate and curved, with two compartments ( Fig. 17 B). Spermathecal duct short and with few coils. Attachments of spermathecal duct and gland to spermatheca at a moderate distance from each other.

Geographical distribution. This species is known from several localities in the Waikaia Forest at the upper course of the Waikaia River of Southland ( Fig. 18 B, red triangles).

Way of life. Specimens were collected from soil in a beech ( Nothofagus ) forest.

Relationships. Males of this species are distinct from those of other members of subgenus in the structure of the median lobe. Hypertrophy of the apex of male median lobe and great increase in the size of spermatheca are shared with members of Z. carltoni . Males of Z. lescheni are also similar to those of the interior Z. montivagus and coastal Z. brouni in the shape of round sclerite.. Based on the latter similarity, I suggest that Z. lescheni shares a common ancestry with the latter two species.

Figures

FIGURE 1. SEM illustrations of head, dorsal aspect, of Zeanillus species. A— Z. phyllobius; B— Z. punctigerus; C— Z. pallidus; D— Z. pellucidus; E— Z. lescheni; F— Z. nanus. Legend: cl—clypeus; cs—clypeal seta; fcc—fronto-clypeal carina; fs—frontal seta; lb—labrum; mp 3 — maxillary palpomere 3; mp 4 — maxillary palpomere 4; pos—postorbital seta; ssa—anterior supraorbital seta; ssp—posterior supraorbital seta. Scale bars = 0.1 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 13. Line drawings of aedeagus of Zeanillus species. Z. carltoni (NZ, Otago, Mount Watkin): 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. lescheni (NZ, Otago, Waikaia Forest): 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. nanus (NZ, Otago, Balclutha): 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. montivagus (NZ, Otago, North Rough Ridge): M—median lobe, right lateral aspect, Napical part of median lobe, dorsal aspect, O—left paramere, left lateral aspect, P—right paramere, right lateral aspect; Z. brouni (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: 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 17. Line drawings of spermatheca, spermathecal duct, and spermathecal gland of Zeanillus species. A— Z. carltoni (NZ, Otago, Mount Watkin); B— Z. lescheni (NZ, Otago, Waikaia Forest); C— Z. nanus (NZ, Otago, Balclutha), the structure is the same as in Fig. 16 H and is repeated for purposes of comparison among species. Legend: sd—spermathecal duct. Scale bar = 0.1 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.