Nesamblyops canaanensis, Sokolov, 2023

Sokolov, Igor M., 2023, Fourteen new species of the genus Nesamblyops Jeannel (Coleoptera: Carabidae: Anillini) from the South Island of New Zealand with redescription of the genus and description of a new subtribe, Zootaxa 5375 (2), pp. 151-192 : 165-167

Nesamblyops canaanensis , sp. nov.

Figures. 9A , 12A , 14A–C , 17A , 19

Type material. HOLOTYPE, male, in NZAC, labeled: Canaan Nel. 13.4.66 J.I. Townsend 66/137 \ forest litter \ Duplicate adults in alcohol \ DSIR \ No \ NZ PB \. PARATYPES (38 specimens mounted on boards and uncounted numerous specimens in two plastic capsules, in NZAC, dissected 11 exx.), 4 males and 8 females labeled same as holotype; 2 males labeled: \ 2 Heaphy Track 304m Nelson \ Litter 67/236 \ 22 Aug. 67 F. Alack \ DSIR \ Ns \ NZ PB \; 1 male labeled: \ Leamould \ Aorere Valley 18-4-63 Forest J.I. Townsend \ NZ PB \; 1 male and 2 females labeled: \ PuPu Valley 21.v. 67 F. Alack \ litter 67/204 \ DSIR \ No \ NZ PB \; 1 male labeled: \ Wetmoss in depression The Parklands Canaan 4.2. 65 L. P. Marchaut \ NZ PB \; 1 male labeled: \ Bainham Nel.Dist. Brown Cow Ridge 3500’ 27.10.65 A.K.Walker \ moss, forest of Dracophyllum 65/541 \ DSIR \ No \; 1 male labeled: \ Litter Parapara Golden Bay 18.11.72 J.I. Townsend \ J.I. Townsend Collection \; 1 male: \ Canaan side Canaan Sdle. \ 2800’ 27.ii.67 Takaka Hill J.I. Townsend \ moss sample 67/92 \ DSIR \ No \ NZ PB \; numerous specimens in plastic capsule: \ Canaan Nel. 4-2-65 litter L.P. Marchaut \ DSIR \ No \ NZ PB \; 3 males and 1 female labeled: \ Canaan Nelson litter Harwood Track 17.9. 64 L. P. Marchaut \ NZ PB \; 1 female labeled: \ Canaan Nelson 550m 27 Feb 67 J.I. Townsend \ moss 67/92 \ NZ PB \; 1 female labeled: \ NEW ZEALAND NN Ramekat Canaan 18 Apr 1966 J.I.Townsend \ Polytrichum moss 66/139 \ teneral \ NZ PB \; 1 male labeled: \ NEW ZEALAND NN Canaan 18 Apr 1966 J.I.Townsend litter 66/137 \ Pselaphidae \ NZ PB \; numerous specimens in plastic capsule: \ N menziesii litter Canaan Nelson 3-3-64 \ J.I. Townsend \ DSIR \ No \ NZ PB \; 2 females labeled: \ Canaan Takaka Hill Harwood Track 17.9.64 litter L.P. Marchaut \ NZ PB \; 1 male labeled: \ Canaan Takaka 17.9.64 litter L.P. Marchaut \ NZ PB \; 1 male labeled: \ Takaka Hill 2600’ 2.4.65 moss sple A.K.Walker 65/295 \ NZ PB \; 1 male and 1 female labeled: \ Takaka Hill, 2000’ 7-2-57 (c) E.S.Gourlay \ DSIR \ No \ NZ PB \; 1 male and 1 female labeled: \ Takaka Hill Nel. 18.iv.63 G.Kuschel \ Nothofagus litter 63/8 \ NZ PB \; 1 female labeled: \ Riwaka Val. NN Sept. 70 J.S. Dugsdale \ Melicytus litter \ NZ PB \.

Etymology. The specific epithet is a Latinized adjective in the masculine form based on the name of the Canaan area in which the type series was collected.

Type locality. New Zealand, South Island, Nelson, Abel Tasman National Park , Canaan area .

Recognition. Adults of this species ( Fig. 1A ) are practically indistinguishable from the adults of many Nesamblyops species based on external characters (cf. with Figs 1C, E ) and are distinguished from them by the structure of the male genitalia.

Description. Large for genus (SBL range 1.71–2.09 mm, mean 1.88± 0.099 mm, n=21).

Habitus. Body form ( Fig. 9A ) markedly convex, elongate ovoid, general proportions wide (WE/SBL0.41±0.010), head narrow relative to pronotum (WH/WPm 0.67±0.015), proportions of pronotum in comparison to elytra average for genus (WPm/WE 0.75±0.015).

Color. Body color brunneorufous, appendages testaceous.

Prothorax. Pronotum ( Fig. 12A ) moderately long in comparison to elytra (LP/LE 0.43±0.016) and moderately transverse (WPm/LP 1.25±0.027), with lateral margins rectilinear constricted posteriorly (WPm/WPp 1.31±0.057). Anterior angles indistinct, posterior angles obtuse (105–119°), rounded. Width between posterior angles greater than between anterior angles (WPa/WPp 0.87±0.038). Basal margin almost rectilinear, slightly convex at middle.

Elytra. Ovoid, narrowly depressed along suture, comparatively long (LE/SBL 0.58±0.008) and moderately wide (WE/LE 0.71±0.019). Humeri completely rounded. Lateral margins slightly divergent at basal half, subparallel at middle and evenly rounded to apex in apical third.

Male genitalia. Median lobe of aedeagus ( Fig. 14C ) moderately arcuate and moderately twisted. Shaft subparallel basally, tapering in apical half. Apex slightly upturned with small rounded tip. Apical orifice long, occupies almost half of the shaft length. Ventral margin of median lobe almost straight. Walls of shaft with few poriferous canals near basal orifice. Dorsal copulatory sclerites with greatly reduced V-contour and rC-sclerite of moderate size ( Fig. 14C ). Left paramere ( Fig. 14A ) comparatively wide, with attenuate apex, bearing three long setae. Right paramere ( Fig. 14B ) of moderate length, bearing three long setae, which are slightly shorter than the length of paramere. Ring sclerite as in Fig. 17A .

Female internal genitalia. Not examined.

Geographical distribution. The range of the species occupies the northwest corner of the South Island and lies mostly within the northern part of the Kahurangi National Park stretching from the Saxon River at the northwest to the Takaka Hills at the northeast of Tasman District ( Fig. 19 , green circles).

Habitat. Specimens were collected mostly from moss samples (labels mention hairy cup Polytrichum moss), as well from forest litter in Dracophyllum, Melicytus and Nothofagus forests (labels mention silver N. menziesii beech).

Relationships. The structure of the male genitalia of N. canaanensis suggests its relatedness to the species with trisetose parameres and well-developed rC-sclerite with small V-contour in the internal sac of median lobe, such as N. hobbit and N. ovipennis , described below.

Figures

FIGURE 1. SEM illustrations of structural features of heads of Anillini: A–C—subtribe Nesamblyopina; A—Nesamblyops oreobius (Broun); B—Nesamblyops subcaecus (Sharp); C—Nesamblyops magnificus, n.sp.; D—Anillinus alleni Sokolov and Carlton; E—Anillinus acutipennis Sokolov and Reddell; F—Geocharidius jalapensis Sokolov and Kavanaugh; G—Zeanillus punctigerus (Broun); H—Pelodiaetodes nunni Sokolov; I—Pelodiaetus sulcatipennis Jeannel. Legend: cl—clypaeus, lse— lateral clypeal setula, mse—medial clypeal setula, om—ommatidium, trom—trace of disappeared ommatidium. Scale = 0.1 mm.

FIGURE 9. Digital images of habitus of New Zealand Nesamblyops species, dorsal aspect.A—N. canaanensis (Canaan, Nelson, SO), B—N. disjunctus (Fletchers Creek, Buller, SO), C—N. hobbit (9mi. N Karamea, Nelson, SO), D—N. karamea (Karamea River Gorge, Nelson, SO), E—N. kuscheli (Flora Hut, MountArthur, Nelson, SO), F—N. magnificus (Allison Reserve,Akatore, Dunedin, SO). Scale bar = 1.0 mm.

FIGURE 12. Digital images of pronota of New Zealand Nesamblyops species, dorsal aspect. A—N. canaanensis (Canaan, Nelson, SO), B—N. disjunctus (Fletchers Creek, Buller, SO), C—N. hobbit (9mi. N Karamea, Nelson, SO), D—N. karamea (Karamea River Gorge, Nelson, SO), E—N. kuscheli (Flora Hut, Mount Arthur, Nelson, SO), F—N. magnificus (Allison Reserve, Akatore, Dunedin, SO), G—N. montanus (Lake Sylvester, Kahurangi National Park, Nelson, SO), H—N. moorei (Kangaroo Creek, Mawhera Forest, Buller, SO), I—N. ovipennis (Mount Arthur, Nelson, SO). Scale bar = 0.2 mm.

FIGURE 14. Line drawings of male genitalia of New Zealand Nesamblyops species. N. canaanensis (Canaan, Nelson, SO): A—left paramere, left lateral aspect, B—right paramere, right lateral aspect, C—median lobe, right lateral aspect. N. disjunctus (Fletchers Creek, Buller, SO): D—left paramere, left lateral aspect, E—right paramere, right lateral aspect, F—median lobe, right lateral aspect. N. hobbit (Mount Domett, Nelson, SO): G—left paramere, left lateral aspect, H—right paramere, right lateral aspect, I—median lobe, right lateral aspect. N. karamea (Karamea River Gorge, Nelson, SO): J—left paramere, left lateral aspect, K—right paramere, right lateral aspect, L—median lobe, right lateral aspect. N. kuscheli (Flora Hut, Mount Arthur, Nelson, SO): M—left paramere, left lateral aspect, N—right paramere, right lateral aspect, O—median lobe, right lateral aspect. N. magnificus (Allison Reserve, Akatore, Dunedin, SO): P—left paramere, left lateral aspect, Q—right paramere, right lateral aspect, R—median lobe, right lateral aspect. Legend: rCs—reversed C-contour; Vs—V-contour. Scale bar = 0.1 mm.

FIGURE 17. Line drawings of ring sclerite of New Zealand Nesamblyops species, male genitalia, dorsal aspect. A—N. canaanensis (Canaan, Nelson, SO), B—N. disjunctus (Fletchers Creek, Buller, SO), C—N. hobbit (Mount Domett, Nelson, SO), D—N. karamea (Karamea River Gorge, Nelson, SO), E—N. kuscheli (Flora Hut, Mount Arthur, Nelson, SO), F—N. montanus (Relax Shelter, Mount Robert Ridge, Nelson, SO), G—N. moorei (Kangaroo Creek, Mawhera Forest, Buller, SO), H—N. ovipennis (Mount Arthur, Nelson, SO), I—N. rotundicollis (Onekaka, Nelson, SO), J—N. subcaecus (Margarets Tarn Lake, Arthur’s Pass, Mid Canterbury, SO), K—N. viator (Secretary Island, Grono Bay, Fjordland, SO), L—N. victoriae (Capleston, Victoria Range, Buller, SO). Scale = 0.2 mm.

FIGURE 19. Distributional records for the Nesamblyops species and images of male median lobe, obtained from specimens, collected in the line-connected with images localities. Green circles—N. canaanensis; black circles—N. hobbit; blue circles— N. ovipennis; yellow circles—N. karamea; red circles—N. kuscheli. Scale bar = 0.5 mm.