Zeanillus brouni, 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: 24-27

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Zeanillus brouni


Zeanillus brouni  , sp.n.

Figs. 4View FIGURE 4 F, 6F, 7F, 10EKQ, 11F, 13Q –T, 14H, 15F, 16F, 18B

Type material. HOLOTYPE, male, in NZAC, board-mounted, undissected, labeled: / New Zealand DN Glen Warren Res Oamaru 19 Jan 0 7 / Washed soil sample. 

PARATYPES (55 specimens, 7 dissected), 8 males and 3 females labeled same as holotype; 1 male and 1 female labeled: / New Zealand: DN, Glen Warren Reserve , Oamaru, 150m, washed soil sample, dry coastal broadleaf forest, H45/864483 J.Nunn 12 Jan 2008 /  ; 9 males and 4 females labeled: / New Zealand DN Glen Warren Res Oamaru 4 Jun 0 6 / In soil sample from forest remnant /  ; 18 males and 8 females labeled: / New Zealand DN Roy Cooper Res Oamaru 2 Aug 0 7 / Washed soil sample broadleaf forest /  ; 1 male and 1 female labeled: / New Zealand DN Roy Cooper Res Oamaru 23 Aug 0 2 / In earthy forest litter /  ; 1 male labeled: / New Zealand: DN, Allison Reserve , Akatore, 150m, washed soil sample, broadleaf /podocarp forest, M31/602701 J.Nunn 2 Dec 2007. 

Specific epithet. The specific epithet honors the surname of Thomas Broun, famous New Zealand coleopterist, the author of thousands of new species, including the first descriptions of New Zealand Anillina

Type locality. New Zealand, South Island, Otago, Oamaru , Glen Warren Reserve. 

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

Description. Size. Medium to large for genus (SBL range 1.73–1.95 mm, mean 1.81± 0.054 mm, n=20).

Habitus. Body form slightly convex, ovoid, moderately elongate (WE/SBL 0.36±0.011), head of moderate width for genus compared to pronotum (WH/WPm 0.72±0.015), pronotum rather narrow in comparison to elytra (WPm/WE 0.72±0.018).

Color. Body color rufotestaceous, appendages testaceous.

Prothorax. Pronotum slightly long (LP/LE 0.41±0.008) and moderately elongate (WPm/LP 1.25±0.026), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.56±0.068). Width between anterior angles moderately greater than between posterior angles (WPa/WPp 1.16±0.058).

Elytra. Slightly depressed along suture, comparatively long (LE/SBL 0.52±0.013) and moderately wide (WE/ LE 0.70±0.025). Lateral margins slightly divergent at basal third, subparallel at middle and evenly rounded to apex in apical third.

Male genitalia. Median lobe ( Fig. 13View FIGURE 13 Q) with convex ventral margin and rather long apex with tapered narrowly rounded tip. Sclerites of internal sac slightly sclerotized, separate, long, almost equal half of the length between apical and basal orifices. Left paramere with apical constriction ( Fig. 13View FIGURE 13 S). Ring sclerite without visible handle ( Fig. 14View FIGURE 14 H).

Female internal genitalia. Goncoxite 2 with short ensiform setae ( Fig. 15View FIGURE 15 F). Spermatheca sclerotized, slightly elongate, comparatively wide, with two compartments ( Fig. 16View FIGURE 16 F). Spermathecal duct short and without coils. Attachments of spermathecal duct and gland to spermatheca close together.

Geographical distribution. This species is known from two distant coastal forest localities of North and South Otago: majority of specimens were collected in Oamaru (Glen Warren Reserve), and only one specimen is known from the Coastal Otago Hills (Alison Reserve). The last locality needs confirmation ( Fig. 18View FIGURE 18 B, white triangles).

Way of life. Specimens were collected in the coastal dry broadleaf forest and in the Podocarp/broadleaf forest.

Relationships. In the structure of male median lobe, members of this species are distinct from the other members of subgenus. The shape of round sclerite is similar to the allopatric interior species Z. lescheni  and Z. montivagus  . Also, females of Z. brouni  resemble those of Z. montivagus  in the shape of spermatheca (i.e., in having two compartments with the larger part short and wide). These morphological similarities suggest that Z. brouni  shares a common ancestry with Z. montivagus  and Z. lescheni  .


New Zealand Arthropod Collection