Arpactophilus drubea Breitkreuz, Ohl & Engel, 2016, sp. nov.
Creators: name: Breitkreuz, Laura C. V.
name: Ohl, Michael
name: Engel, Michael S.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Crabronidae
Arpactophilus
Arpactophilus drubea

description: Arpactophilus drubea sp. nov.
(Figs. 49–50)
Diagnosis. Arpactophilus drubea is the only New Caledonian species in the genus with the combination of one submarginal cell in the forewing, a clypeus with the apical half yellow, yellow markings on the lower frons, a head almost as broad as long, a dorsally-interrupted occipital carina, and a roughly reticulate dorsal surface to the propodeum.
Description. FEMALE: Total length 3.2–3.5 mm, mean = 3.4 mm; forewing length 1.8–2.2 mm, mean = 2.0 mm.
Body black, with areas of dark and light yellow. Light yellow: apical half of clypeus (Fig. 49); labrum; mandible; palpi; front of scape; pedicel; area on lower frons between base of scape and inner compound eye margin (Fig. 49); anterior pronotal margin; pronotal lobe; tegula; coxae apically (in some specimens almost completely); trochanters; femora; tibiae; tarsi. Dark yellow: posterior of scape; flagellum. Wings hyaline; pterostigma light brown.
Head about as long as wide in frontal view. Apical margin of clypeus medially projecting, with shallow, broad concave incision (Fig. 49). Apical margin of labrum with two lobes. Ventral mandibular tooth about ¼–1/5 of total mandibular length, not reaching opposite mandibular base. Palpal formula 4:3. Frons colliculate with dense punctation and dense short setae. Frontal carina present from median ocellus to midlength of clypeus, forming a point at basal clypeal margin. Scape 3.4 × 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 colliculate with sparse, long setae ventrally, 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 0.8 × as long as wide in dorsal view. Mesosoma imbricate with dense punctation (Fig. 50), except dorsal surface of propodeum; lateral surface of propodeum also transversely carinulate; dorsal surface of propodeum coarsely reticulate (similar to pattern in Fig. 19). Pitted sulcus present posterior to fine mesoscuto-mesoscutellar sulcus. Hypersternal sulcus barely present, only as a small linear impression close to omaulus. Metafemur 2.7 × as long as wide. Metatibia without differently colored area apically. Pretarsal claws without teeth. Forewing with one submarginal cell. Hind wing with five distal hamuli.
Metasoma polished, sparsely punctate (Fig. 50). Metasomal sternum II without bulge (as in Fig. 1). Pygidium with broad row of silk setae apically.
MALE: As in female except in genitalic structures. Metasomal sternum VIII narrow.
Remarks. Arpactophilus drubea is similar to A. drehu but they can be distinguished by the extent of the occipital carina, which is continuous in the latter. This species has a broader head and coarser dorsal surface to the propodeum than A. cemuhi, and differs from A. caledonicus in the yellow markings on the clypeus and frons.
Material examined. HOLOTYPE ♀: “Nouvelle Calédonie, Pindaï 30m, 18.IV.1995, Réc. Chazeau & Jourdan” [MNHN].
PARATYPES 8♀, 1♂: ♀: (3x) “Nouvelle Calédonie, Pindaï 30m, 18.IV.1995, Réc. Chazeau & Jourdan” [CAS]; (3x) “Nouvelle Calédonie, Mont Koghis. 350m, 25.IV.1995, Réc. Chazeau & Jourdan” [ZMB]; (1x) “Nouvelle Calédonie, Mont Koghis. 350m, 3.V.1995, Réc. Chazeau & Jourdan, Coll. Tussac” [MNHN]. ♂: “Nouvelle Calédonie, Mont Koghis. 350m, 3.V.1995, Réc. Chazeau & Jourdan, Coll. Tussac” [MNHN]. Etymology. The specific epithet is taken from the name Drubea, one of the New Caledonian native languages. It is treated as a noun in apposition.
description: Published as part of Breitkreuz, Laura C. V., Ohl, Michael & Engel, Michael S., 2016, A review of the New Caledonian Arpactophilus (Hymenoptera: Crabronidae), pp. 1-66 in Zootaxa 4063 (1) on pages 22-23, DOI: 10.11646/zootaxa.4063.1.1, http://zenodo.org/record/270412