Arpactophilus haveke, 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 : 27

Arpactophilus haveke sp. nov.

( Figs. 59–60 )

Diagnosis. Arpactophilus haveke is the only New Caledonian species in the genus that has a stalked triangular submarginal cell II in the forewing, and particularly when taken in combination with the light reddish-brown metasoma further distinguishes itself from its congeners. Another distinctive feature is the apical margin of thee clypeus which is projecting medially and medioapically forming a point, without a medial incision ( Fig. 59 ).

Description. FEMALE: Total length 3.8 mm; forewing length 2.3 mm.

Body black, with areas of light yellow and light reddish-brown. Light yellow: apical margin of clypeus ( Fig. 59 ); mandible; palpi; scape in front; pronotal lobe; tegula; coxae apically; trochanters; femora partially; tibiae, except apical area on metatibia; tarsi. Light reddish-brown: posterior of scape; pedicel; flagellum; most of coxae; most of femora; apical area on metatibia; metasoma ( Fig. 60 ). Wings hyaline; pterostigma light brown. Labrum and anterior pronotal margin not visible.

Head about as long as wide in frontal view. Apical margin of clypeus projecting medially, medioapically forming a point (not incised or with a straight margin as in some other species) ( Fig. 59 ). Labrum not visible. Ventral mandibular tooth about ¼–1/5 of total mandibular length, not reaching opposite mandibular base. Palpal formula 4:3. Frons imbricate with sparse punctation and short setae. Frontal carina present from median ocellus to apical margin of clypeus. Scape 3.7 × as long as wide. Ocellar triangle anterior of tangent between upper posterior orbits of compound eyes, lateral ocelli anterior of tangent by approximately their diameter. Occipital carina interrupted dorsally ( Fig. 6 ). Gena imbricate with sparse punctation and sparse setae, without tubercles, spines, or dorsoventral carina. Hypostomal midventral line faint, not angulate.

Mesosoma about 1.7 × as long as wide in dorsal view. Propodeum about 0.8 × as long as wide in dorsal view. Mesosoma imbricate except on propodeum ( Fig. 60 ); lateral and dorsal surface of propodeum transversely carinulate; dorsal surface of propodeum also finely reticulate with transverse carinulae apically (similar to pattern in Fig. 20 ). No groove present posterior to mesoscuto-mesoscutellar sulcus. Hypersternal sulcus absent. Metafemur 2.6 × as long as wide. Metatibia with a light brown area apically. Forewing with two submarginal cells; submarginal cell II triangular, not reaching media but connected to it by a single crossvein (i.e., cell is stalked). Hind wing with four distal hamuli.

Metasoma polished, punctation and associated setae sparse ( Fig. 60 ). Metasomal sternum II without bulge (as in Fig. 1 ). Pygidium with narrow row of silk setae.

MALE: Difference from female aside from genitalic structures: yellow marking on clypeus larger; yellow markings present on lower frons and malar space; flagellum yellow; metasoma brown. Metasomal sternum VIII neither broadened nor narrowed.

Remarks. Arpactophilus haveke can easily be distinguished from the other species with a reddish metasoma by its stalked second submarginal cell. The only species that has a similarly triangular (but not stalked) second submarginal cell is A. tiri , which has a much more slender body form ( Fig. 102 ).

Material examined. HOLOTYPE ♀: “Nouvelle Calédonie, Pinda 30m, 18.IV.1995, Réc. Chazeau & Jourdan [ MNHN].

PARATYPE 1♂: “Nouvelle Calédonie, Pinda 30m, 18.IV.1995, Réc. Chazeau & Jourdan [ MNHN].

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

Figures

FIGURES 59 – 64. Facial views and lateral habitus of ♀ holotypes (except for Arpactophilus irwini Bohart) of species of Arpactophilus Smith. 59. A. haveke sp. nov., facial view; 60. A. haveke, lateral habitus; 61. A. iaai sp. nov., facial view; 62. A. iaai, lateral habitus; 63. A. irwini, facial view; 64. A. irwini, 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 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.

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 101 – 106. Facial views and lateral habitus of ♀ holotypes (except for Arpactophilus webbi Bohart) of species of Arpactophilus Smith. 101. A. tiri sp. nov., facial view; 102. A. tiri, lateral habitus; 103. A. vamale sp. nov., facial view; 104. A. vamale, lateral habitus; 105. A. webbi, facial view; 106. A. webbi, lateral habitus.