Arpactophilus bwatoo, Breitkreuz, Laura C. V., Ohl, Michael & Engel, Michael S., 2016

Breitkreuz, Laura C. V., Ohl, Michael & Engel, Michael S., 2016, A review of the New Caledonian Arpactophilus (Hymenoptera: Crabronidae), Zootaxa 4063 (1), pp. 1-66 : 14-15

Arpactophilus bwatoo sp. nov.

( Figs. 33–34 )

Diagnosis. Arpactophilus bwatoo is the only New Caledonian species in the genus with the combination of a continuous occipital carina ( Fig. 5 ), two submarginal cells in the forewing, and a half yellow clypeus with a medially projecting apical margin and with a shallow, broad incision ( Fig. 33 ), and a black metasoma without a bulge on sternum II ( Fig. 34 , and as in Fig. 1 ).

Description. FEMALE: Total length 5.5 mm; forewing length 2.8 mm.

Body black, with areas of yellow and brown. Yellow: apical half of clypeus ( Fig. 33 ); labrum; mandible; palpi; scape in front; coxae apically; trochanters; most of femora; tibiae; tarsi. Brown: posterior of scape; pedicel; flagellum apically; tegula; coxae basally, pro- and mesofemora ventrally ( Fig. 34 ); fine line on metafemur. Wings hyaline; pterostigma dark brown.

Head about as long as wide in frontal view. Apical margins of clypeus and labrum medially projecting, with shallow, broad incision or concavity ( Fig. 33 ). Ventral mandibular tooth about ¼–1/5 of total mandibular length, not reaching opposite mandibular base. Palpal formula 4:3. Frons finely costate with sparse punctation and associated setae on upper frons and dense punctation and associated setae on lower frons. Frontal carina present from median ocellus to midlength of clypeus. Scape 4.1 × as long as wide. Ocellar triangle anterior of tangent between upper posterior orbits of compound eyes, lateral ocelli anterior of tangent by less than their diameter. Occipital carina continuous ( Fig. 5 ). Most of gena polished, with sparse punctation and sparse long setae, without tubercles, spines, or dorsoventral carina. Hypostomal midventral line carinate with bordering sparse and short transverse carinulae on hypostomal integument, not angulate.

Mesosoma about 1.7 × as long as wide in dorsal view. Propodeum about 0.9 × as long as wide in dorsal view. Mesosoma dorsally imbricate with sparse punctation ( Fig. 34 ), except dorsal surface of propodeum, laterally colliculate; lateral surface of propodeum imbricate and transversely carinulate; dorsal surface of propodeum coarsely reticulate (similar to pattern in Fig. 18 ). Pitted sulcus present posterior of fine mesoscuto-mesoscutellar sulcus. Hypersternal sulcus present, simple. Metafemur 3.4 × as long as wide. Metatibia without differently colored area apically. Pretarsal claws without teeth. Forewing with two submarginal cells; anterior border of submarginal cell II shorter than posterior border. Hind wing with five distal hamuli.

Metasoma polished, almost impunctate ( Fig. 34 ). Metasomal sternum II without bulge (as in Fig. 1 ). Pygidium with broad row of silk setae apically.

MALE: As in female except genitalic differences. Metasomal sternum VIII narrow.

Remarks. Arpactophilus bwatoo is similar to A. pije and A. jawe in body size and coloration, but can be distinguished by the costate frons ( Fig. 33 ). The species has a yellow metafemur with small dark brown markings, which differs from the almost completely black metafemur of A. pije and the yellow and whitish-yellow metafemur of A. jawe .

Material examined. HOLOTYPE ♀: “Nouvelle Calédonie, Mont Koghis. 350m, 25.IV.1995, Réc. Chazeau & Jourdan [ MNHN].

PARATYPE 1♂: “Nouvelle Calédonie, Mont Koghis. 350m, 3.IV.1995, Réc. Chazeau & Jourdan [ MNHN].

Etymology. The specific epithet is taken from the name Bwatoo , one of the New Caledonian native languages. It is treated as a noun in apposition.

Figures

FIGURES 29 – 34. Facial views and lateral habitus of ♀ holotypes of species of Arpactophilus Smith. 29. Arpactophilus arhoe sp. nov., facial view; 30. A. arhoe, lateral habitus; 31. A. brochus sp. nov., facial view; 32. A. brochus, lateral habitus; 33. A. bwatoo sp. nov., facial view; 34. A. bwatoo, lateral habitus.

FIGURES 5 – 9. Head and metatibial details of New Caledonian Arpactophilus Smith. 5. Schematic view of posterior of head of Arpactophilus, arrow indicates complete occipital carina; 6. Schematic with arrow indicating incomplete, dorsallyinterrupted occipital carina; 7: Metatibia of holotype ♀ of A. xaragure sp. nov., arrow indicating slightly differently colored but not differently-structured area apically; 8. Metatibia of holotype ♀ of Arpactophilus orowe sp. nov., arrow indicating differently colored and structured area apically; 9. Metatibia of paratype ♀ of A. orowe, scanning electron micrograph with arrow indicating concave area apically.

FIGURES 1 – 4. Line drawings of metasomata and forewings of New Caledonian species of Arpactophilus Smith. 1. Metasoma in profile of ♀ of Arpactophilus merle sp. nov., arrow indicates unmodified metasomal sternum II; 2. Metasoma in profile of ♀ of A. irwini Bohart, arrow indicates ventrally swollen metasomal sternum II. 3. Forewing of ♀ of A. irwini; ps: pterostigma, sz I: submarginal cell I, sz II: submarginal cell II. 4, Forewing of ♀ of A. caledonicus Bohart; ps: pterostigma, sz I: submarginal cell I.

FIGURES 16 – 22., Dorsal surfaces of ♀ of species of Arpactophilus Smith. 16. Arpactophilus concavus Bohart; 17. A. irwini Bohart; 18. A. kumak sp. nov. (holotype); 19. A. merle sp. nov. (holotype); 20. A. caac sp. nov. (holotype); 21. A. kraussi Bohart; 22. A. propodealis Bohart.