Ammoplanus (Ammoplanus) nasutus, Tsuneki, 1972

Boucïek, Zdenek, 2001, Palaearctic species of Ammoplanus (Hymenoptera: Sphecidae), Journal of Natural History 35, pp. 849-929 : 902-903

A. (Ammoplanus) nasutus Tsuneki

Ammoplanu s nasutus Tsuneki, 1972: 222 ±223. Mongolia: South-Gobi Aimak. Holotype female, by original designation, in TMB (examined).

Addition to diagnostic features (and good original description)

Female. Distal two-thirds of pterostigma dark. head rather ¯at, in lateral view 2.2 times as long as stout. Frons dull with longitudinal strigosity but almost no puncturation on its moderately convex part but this ends at distinct cross-swelling below which are two broad depressions narrowly extended on either side thus indicating shallow adorbital foveae; part below cross-swelling reticulate and in median line slightly convex, part above toruli almost their diameter above lower ocular line. Interantennal area as well as space between torulus and eye smooth, shiny, including broad round pit dorso-mesad of either torulus. Clypeal tooth horizontal and long, lanceolate (narrowed between base and middle), its apex dorsally slightly depressed. Labrum cordiform, sides below middle strongly sinuate, ending with two sharp teeth separated by incision deeper than distance between tips of teeth ( Tsuneki, 1972: 221, ®gure 115). Mandible very broad at base, upper edge near middle expanded into a broad subangulate tooth (as in hoOEeri, ®gure 21). Oral fossa in form of broad gothic arch with slightly sinuate sides; other sides of fossa anteriorly depressed and slightly produced as rounded corners; behind the angulate and raised posterior corner of fossa a deep transverse double pit bearing anteriorly some longitudinal striae; long and broad surface between this pit and foramen magnum (median two-quarters of underside) shiny, distinctly though shallowly concave, double, being in median line divided by a blunt median crest; posteriorly the double cavity delimited by distinct cross-crest continuing from lateral branches of occipital carina; otherwise sublateral surface of underside of head convex, shiny, in places smooth, otherwise with minute longitudinal striation which turns to microreticulation in part of the double central depression.

Male. Not yet known; it should have the underside of the head similar to that of the female; on that assumption it was placed tentatively in the key.

Comment. By the depressions on the underside of head and the female mandible expanding into a tooth on its upper edge A. nasutus belongs to the vicinity of hoOEeri, rjabovi and montincola.

Material examined. Mongolia ( South Gobi Aimak ): Tachilga ul between Zogt-Ovoo and Dalanzadgad, holotype female (see above and in Tsuneki, 1972: 223) .

Distribution. Mongolia.