Pseudoceraphron kepanus, Jałoszyński, 2020

Jałoszyński, Paweł, 2020, Three new species of Pseudoceraphron from Japan and New Zealand (Hymenoptera: Chalcidoidea: Pteromalidae), Zootaxa 4810 (3), pp. 546-558 : 554-557

Pseudoceraphron kepanus sp. n.

Figs 21–31

Type material: Holotype: ♀, “ NEW ZEALAND, North Is. / Auckland, Kepa Bush Res. / -36.86, 174.83 / 8-9 VI 2019 / leg. P. Jałoszyński ” [white, printed], “ PSEUDOCERAPHRON / kepanus m. / HOLOTYPUS / P. Jałoszyński, 2020” [red, printed] ( NZAC).

Diagnosis. Scape, AN7 and clava yellowish and slightly infuscate, anelli contrastingly darker, grey-brown, pedicel and F1 pale yellowish ( Fig. 22 ); body ( Fig. 21 ) with head predominantly orange-brown but with darkened sides of scrobal region, convexity between toruli, posterior margin of vertex and posterior margins of genae, and postcercale very indistinctly lighter than surrounding areas, but otherwise contrast between lightly pigmented and darkly pigmented areas strong; vertex ( Fig. 26 ) and mesoscutum ( Fig. 25 ) lacking long bristles; OOL/POL ~ 1.25; anterior margins of lateral ocelli ( Fig. 26 ) not connected by ridge; antennal clava 4.1× as long as F1; notauli ( Fig. 25 ) Y-shaped; scutellum ( Fig. 25 ) subtrapezoidal, with lateral margins sharply marked and posterior margin weakly concave medially; axillae ( Fig. 25 ) small, within anterior fourth of scutellum; wing stump ( Fig. 25 ) with bristle nearly 1.5× as long as scutellum; ventral margin of hypopygium ( Fig. 29 ) angulate, its proximal portion straight, distal portion with additional angulate expansion.

Description (female). Body ( Figs 21–23, 25 ) stout; length 0.85 mm. Antenna with scape yellowish basally and weakly infuscate in distal half, pedicel pale yellowish, AN1–6 dark, grey-brown, AN7 lighter brown, F1 pale yel- lowish, clava weakly infuscate. Body pigmentation ( Figs 21–22 ) predominantly black with head orange-brown and mesosoma slightly lighter than gaster, but also with orange tint on pronotum, prepecti, mesopleuron, mesoscutum and scutellum; sides of scrobal region, convexity between toruli, posterior margin of vertex, and posterior margins of genae distinctly darker than adjacent areas; all legs ( Fig. 21 ) black, except for lighter, grey-brown tarsi; posterior gaster ( Fig. 21 ) dark brown, postcercale only indistinctly lighter.

Head ( Figs 24, 25 , 26, 27 ) measurements: length 162 μm, width 310 μm, height 203 μm, width of oral fossa 110 μm, malar space 83 μm, longest diameter of compound eye 143 μm, POL 43 μm, OOL 53 μm. Head much broader than mesoscutum ( Fig. 25 ), distinctly broader than high; clypeal margin ( Fig. 27 ) weakly concave; malar sulcus complete and in lateral view ( Fig. 24 ) slightly sinuate, with tiny elongate pit at lateral margin of oral fossa; longi- tudinal convexity between toruli ( Fig. 27 ) well developed, relatively sharply delimited laterally, dorsally extending above torulus for distance equal to slightly more than one diameter of torulus; scrobes ( Fig. 27 ) developed as shallow depressions with indistinct margins. Clypeus ( Fig. 28 ) smooth, face with shallow microsculpture composed of polygonal elongate cells surrounding smooth scrobal area, the microsculptured areas with short, sparse setae, but frons above scrobal region ( Fig. 27 ) smooth and sparsely setose except for short asetose area just in front of ocellar triangle. Vertex ( Fig. 26 ) with indistinct posterior edge, with shallow, transverse polygonal microsculpture and short, sparse setae, long bristles absent; transverse ridge between anterior ocelli absent; occiput finely microsculptured, with polygonal, transverse cells. Gena ( Fig. 24 ) with shallow microsculpture composed of elongate polygonal cells posteriorly parallel to posterior genal margin and anteriorly to posteroventral margin of eye, and with distinct and nearly straight posterior edge. Antenna ( Fig. 28 ) 369 μm in length, scape in distal half distinctly narrowed, pedicel distinctly broadening distally; AN1 asetose, AN2–7 each with sparse setae; F1 and each segment of clava with one ring of longitudinal sensilla; clava distinctly demarcated from F1, with its first segment clearly shorter than segments 2 and 3 combined; lengths: scape 107 μm, pedicel 55, AN1 2 μm, AN2 7 μm, AN3 8 μm, AN4 12 μm, AN5 14 μm, AN6 12 μm, AN7 13 μm, F1 27 μm, clava 111 μm.

Mesosoma ( Figs 24–26 ) measurements: length 205 μm, maximum width 198 μm; length of pronotum 34 μm, width of pronotum 186 μm, length of mesoscutum 82 μm, length of scutellum 50 μm, length of postscutellar portion of propodeum 41 μm. Pronotum dorsally ( Fig. 26 ) with distinct microsculpture composed of transverse polygonal cells. Mesoscutum ( Fig. 25 ) strongly transverse, with shallow microsculpture composed of transverse polygonal cells and with 9 dorsal pairs of short setae; notauli ( Fig. 25 ) Y-shaped, posteriorly united into a common furrow near middle of mesoscutum. Scutellum ( Fig. 25 ) transverse, subtrapezoidal with posterior margin slightly concave medially, and with sharply marked lateral margins; flat surface with shallow microsculpture composed of transverse polygonal cells, and with two transverse rows of setae present, the anterior row with 2 setae and posterior row with 4 setae. Axillae ( Fig. 25 ) small, within only anterior ¼ of scutellum. Propodeum ( Fig. 25 ) with postscutellar portion strongly transverse, posterior margin strongly concave medially, surface smooth but with a pair of fine longitudinal carinae, and lacking dorsal setae.

Prepectus ( Fig. 24 ) triangular and smooth, poorly visible in dorsal view. Mesopleuron (partly visible in Fig. 24 ) subtriangular, short, smooth.

Wing stumps ( Fig. 25 ) weakly projecting laterad, each with bristle about as long as 1.5× scutellar length.

Petiole ( Fig. 25 ) short, transverse, dorsally with two lateral pairs of fine but relatively sharply marked longitu- dinal carinae, and smooth between carinae.

Gaster ( Figs 21, 23, 25 ) measurements: length 488 μm, width 312 μm, length of postcercale (excluding ovi- positor sheaths) 60 μm; T1 ( Figs 23, 25 ) nearly 4 × as long as remaining tergites combined (excluding ovipositor sheaths), dorsally largely smooth except for barely discernible, superficial reticulation just behind its anterior mar- gin, and sparsely covered with short and nearly recumbent setae, the setae distinctly denser on anterior half, and remaining tergites conspicuously short, each smooth; cerci ( Fig. 30 ) each with one long and two shorter setae, post- cercale ( Fig. 30 ) with sparse, long setae; ovipositor sheaths ( Fig. 30 ) about as long as epipygium, sparsely setose; ovipositor ( Fig. 31 ) with upper valve serrate, lower valve not visible in studied specimen. Hypopygium in lateral view ( Fig. 29 ) angulate, with proximal margin straight, distal margin with additional angulate expansion.

Etymology. Named after Kepa Bush Reserve in Auckland.

Remarks. This species is most similar to P. zealandicus , see remarks for the latter species.

Figures

FIGURES 21–25. Pseudoceraphron kepanus sp. n., holotype female, photographed in ethanol (21, 22) and scanning electron micrographs (23–25). Lateral (21, 23) and dorsal (25; arrowhead indicating axilla) habitus; close-up of head, mesosoma and anterior portion of gaster in lateral view (22, 24).

FIGURES 26–31. Pseudoceraphron kepanus sp. n., holotype female, scanning electron micrographs. Head in dorsal (26) and anterior (27) views; antenna in anterior view (28); hypopygium in lateral view (29); tip of gaster in lateral view (30, 31).