Zeanillus phyllobius (Broun)

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 : 8-11

Zeanillus phyllobius (Broun)

Figs. 1 A, 2A, 3A–B, 4A, 5A, 6A, 7A, 9A, 10AFL, 11A, 12I –L, 14A, 15A, 16A, 18A

Anillus phyllobius Broun, 1893: 164 . Type locality: «Riccarton Bush, Christchurch» (original citation).

Examined material. Six specimens (3 dissected) from the following localities: Canterbury: Christchurch, Riccarton Bush; Port Hills , Ahuriri Scenic Reserve; Banks Peninsula, Coopers Knob.

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

Description. Size. Medium for genus (SBL range 1.67–1.74 mm, mean 1.70± 0.034 mm, n=4).

Habitus. Body form slightly convex, ovoid, moderately elongate (WE/SBL 0.37±0.008), head of moderate width for genus compared to pronotum (WH/WPm 0.74±0.013), pronotum of moderate width in comparison to elytra (WPm/WE 0.74±0.020).

Color. Body color rufotestaceous, appendages testaceous.

Prothorax. Pronotum moderately long (LP/LE 0.44±0.016) and moderately elongate (WPm/LP 1.31±0.031), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.73±0.097). Width between anterior angles much greater than between posterior angles (WPa/WPp 1.36±0.044).

Elytra. Slightly depressed along suture, comparatively short (LE/SBL 0.48±0.015) and moderately wide (WE/ LE 0.77±0.022). Lateral margins slightly divergent at basal half, subparallel behind middle, and evenly rounded to apex in apical third.

Male genitalia. Median lobe ( Fig. 12 I) with straight ventral margin and short semicircular apex. Apical orifice area with a pair of long ostial fields. Sclerites of internal sac united basally, long, slightly shorter than the length between apical and basal orifices. Left paramere with apical constriction ( Fig. 12 K). Ring sclerite with long and slightly transverse handle ( Fig. 14 A).

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

Geographical distribution. This species is known from the hills of Banks Peninsula and adjacent coastal territories of Mid Canterbury ( Fig. 18 A, white circles).

Way of life. Specimens were collected in the broadleaf forest.

Relationships. The structure of male genitalia and spermatheca suggest that this species is the sister taxon to the allopatric Z. punctigerus from the interior.

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 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.