Agnosthaetus truncatus Clarke, 2011

(29) Agnosthaetus truncatus Clarke View in CoL , new species

( Figs. 171–173 View Figs , Map 6 View Map 6 )

Type material. Holotype. ♂, with card plus four other labels: “[on underside of specimen card] J832[?]| CHRISTCHURCH| 11[N].2.9.10.50/ M. Cameron | Bequest| B.M.1955-147/ FMNH-INS 0000 048 018 / Agnosthaetus | sp. n. 4| P.M. Hammond | det. 1984/ HOLOTYPE Agnosthaetus truncatus Clarke , ♂, design. D. Clarke 2011”, in BMNH. Specimen mounted on card . Paratypes. 4 specimens ( 1♂ 3♀). NEW ZEALAND: South Island: MC: Banks Peninsula , Ahuriri Bush Scen. Res., 480 m, 43°39.971′S, 172°37.428′E, 1.iv.1982, 82/48, litter & rotten wood, G. Kuschel GoogleMaps , 1♂, 2♀, FMNH-INS 48014–016 (in NZAC); Banks Peninsula, Coopers Knob , 43°39.768′S, 172°37.452′E, 9.iv.1970, litter at base of Dacrydium cupressinum, D.S. Horning GoogleMaps , 1♀, FMNH-INS 48017 (in NZAC) .

Diagnosis. Agnosthaetus truncatus may be easily distinguished from A. sculptus only by aedeagal characters, including the broadly expanded apicolateral lobes of the median lobe, with strongly reduced apicomedial setae ( Fig. 173 View Figs ; barely visible in dorsal view: Fig. 172 View Figs ), together with the apices of the parameres largely concealed in dorsal view.

Description. Color: Variably brownish, with forebody and abdominal segments darker brown to nearly black. Head: Frontal ridge absent. Dorsum sparsely punctate; with punctures distributed anteriorly, laterally, and posteriorly on disc, middle part impunctate. Punctures shallow, rather indistinct; diameter subequal to diameter of eye facet; interpuncture distance approximately 0.5–1.0X puncture diameter. Dorsal microsculpture present on entire or most of surface; distinctly reticulate. Dorsal tentorial sulcus ( cf. Figs. 10–11 View Figs , dt) broadly ovate; width twice puncture diameter. Sublongitudinal ridge ( cf. Fig. 10 View Figs , sr) indistinct, more or less absent; crest at antennal tubercle with distinct microsculpture. Area above and behind antennoocular carina ( Figs. 10–11 View Figs , arrow) more or less smooth, without subsidiary carinae. Antenno-ocular carina joining eye at or behind middle ( cf. Fig. 10 View Figs , ao). Temple ( Fig. 11 View Figs , tm) short, much less than 50% EYL. Subocular surface more or less evenly microsculptured ( cf. Fig. 65 View Figs ). Labrum distinctly sexually dimorphic ( Fig. 171 View Figs ). Apical labral margin in males shallowly emarginate medially, evenly dentate, with 16–17 teeth ( n =2), with 2 broadly rounded, dorsally projecting, transversely oriented medial teeth, with or without up to 3 teeth between them. Apical labral margin in females broadly convex, not emarginate medially; with 18–19 teeth ( n =3), all teeth subequal in length. Adoral labral surface in males with subapical transverse ridge ( Fig. 171 View Figs , arrow). Mandible sexually dimorphic; males with single, dorsally directed tooth, with weakly developed preapical spur ( cf. Fig. 190 View Figs , arrow); females with single, mesially projecting tooth, without spur. Prothorax: Pronotum with distinctly reticulate microsculpture. Medial pronotal sulci anteriorly separate from and terminating posterior to anterior punctures. Distance between medial sulci very slightly greater posteriorly. Pronotal basolateral carina present, distinct ( cf. Fig. 73 View Figs , bp). Pronotal macrosetal punctures distinct ( cf. Fig. 73 View Figs ). Medial pronotal seta subequidistant from medial and lateral sulci ( cf. Fig. 73 View Figs , mu). Pronotal hypomeron ( Fig. 24 View Figs , hy) with distinct reticulate microsculpture. Prosternum with faintly reticulate microsculpture. Pterothorax: Elytron ( Fig. 23 View Figs , e) with distinct microsculpture; with 2 macrosetae and inconsistently several others, set in distinct punctures; laterally with 1 or 2 ridges ( cf. Fig. 88 View Figs , ek, with or without mr). Mesothoracic epimeral region ( Fig. 24 View Figs , mer) with distinct microsculpture. Metathoracic pleural region ( Fig. 24 View Figs , m) with distinct reticulate microsculpture. Metathoracic pleural ridge present ( cf. Fig. 88 View Figs , mp), fully developed; metathoracic pleural groove ( Fig. 24 View Figs , gr) incomplete posteriorly, forming elongate oval punctiform impression. Abdomen: Abdominal vestiture short, somewhat appressed, dorsally more or less evenly projecting posteriorly but with middle setae directed posteromedially. Aedeagus ( Fig. 172 View Figs ): “ Type B” (see description on p. 8). Apical part of median lobe with strongly explanate lateral lobes, produced into short narrow point. Apicolateral setae small; apicomedial setae up to 5X longer than apicolateral setae (arranged in small group at apex; Fig. 173 View Figs ). Paramere not exceeding apex of median lobe; in lateral view produced apically into lobe; with apical part perpendicular to median lobe (and mostly obscured by median lobe in dorsal view); in dorsal view with outer side gently convex; with 2 setae on ventral edge and 2 on mesal side.

Etymology. The specific name truncatus (-a, -um) is an adjective from Latin, meaning shortened by cutting off, and refers to the apex of the median lobe.

Distribution. ( Map 6 View Map 6 ). South Island: MC.