Zeanillus montivagus, 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 : 29-30

Zeanillus montivagus , sp.n.

Figs. 7 H, 11I, 13M–P, 14G, 15I, 16G, 18B

Type material. HOLOTYPE, male, in NZAC, point-mounted, undissected, labeled: / New Zealand CO North Rough Ridge 8 Dec 1984 1000m B.I.P.Barratt / NZ Arthropod Collection , NZAC, Private Bag 92170 AUCKLAND New Zealand /.

PARATYPES (5 specimens, 3 dissected), 4 males and 1 female labeled same as holotype.

Specific epithet. The specific epithet is a Latinized adjective in the masculine form and is derived from the Latin adjective montivagus meaning " wandering over the mountains ". The epithet refers to the mountainous landscape at the locality, where this species was collected.

Type locality. New Zealand, South Island, Otago, North Rough Ridge .

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

Description. Size. Medium for genus (SBL range 1.64–1.73 mm, mean 1.69± 0.044 mm, n=6).

Habitus. Body form slightly convex, ovoid, moderately elongate (WE/SBL 0.35±0.013), head of moderate width for genus compared to pronotum (WH/WPm 0.73±0.009), pronotum rather wide in comparison to elytra (WPm/WE 0.78±0.029).

Color. Body color rufotestaceous, appendages testaceous.

Prothorax. Pronotum slightly long (LP/LE 0.38±0.010) and moderately elongate (WPm/LP 1.28±0.023), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.68±0.130). Width between anterior angles much greater than between posterior angles (WPa/WPp 1.31±0.074).

Elytra. Slightly depressed along suture, comparatively long (LE/SBL 0.55±0.012) and slightly wide (WE/LE 0.63±0.028). Lateral margins slightly divergent at basal third, subparallel at middle third and evenly rounded to apex in apical third.

Male genitalia. Median lobe ( Fig. 13 M) with broadly concave ventral margin and short semicircular apex. Apical orifice area with a pair of ostial fields. Sclerites of internal sac separate, uneven: dorsal is strongly sclerotized and bifurcated basally, ventral is weakly sclerotized, narrow and linear; sclerites shorter than the half of the distance between apical and basal orifices. Left paramere with apical constriction ( Fig. 13 O). Ring sclerite without visible handle ( Fig. 14 G).

Female internal genitalia. Goncoxite 2 with short ensiform setae ( Fig. 15 I). Spermatheca sclerotized, slightly elongate, ovoid, with two compartments ( Fig. 16 G). Spermathecal duct short and without coils. Attachments of spermathecal duct and gland to spermatheca at a moderate distance from each other.

Geographical distribution. This species is known from one locality only in the North Rough Ridge at 1000m altitude ( Fig. 18 B, black triangle).

Way of life. No precise data on habitat are available.

Relationships. In the structure of copulatory sclerites of median lobe, males of this species are distinct from those of the other members of subgenus. In the shape of round sclerite, males of this species are similar to those of the interior Z. lescheni and coastal Z. brouni . Members of Z. montivagus are similar to those of Z. brouni in the presence of ostial fields at apical orifice in the male median lobe and in the shape and proportions of the spermatheca of females (i.e., rounded on one side and tapered on the other). Based on these morphological evidences and species ranges, I suggest that Z. montivagus shares a common ancestry with Z. brouni and Z. lescheni .

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 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 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.