Lonchaea dama, Macgowan, 2018

Macgowan, Iain, 2018, Definition of the Lonchaea polyhamata species-group (Diptera, Lonchaeidae) with a description of new species, Zootaxa 4446 (3), pp. 325-342 : 326-329

Lonchaea dama sp. nov.

Description. Male: Head: Eyes sparsely covered with pale hairs, these slightly shorter than width of an ocellus. Frons matt black, covered with light grey pollinosity, frontal and interfrontal setulae numerous, relatively short, not more than 0.2x length of orbital seta. Orbital plate sub-shining black, dulled by microsculpture, bare apart from orbital seta. Lunule setulose, ground colour black. Face and parafacials light grey pollinose. Antennae black; postpedicel obscurely orange-brown at extreme medial base, length to depth ratio 2.3:1. Arista with microscopic pubescence. Anterior genal setae in a single, well-spaced row of 5 along mouth margin.

Thorax: Scutum sub-shining black, thoracic sclerites grey pollinose. Anepisternum with a row of 3 anterior setae, 1 or 2 strong setulae lying ventral to these, 4 posterior setae, remainder of sclerite with a scattering of setulae almost as long as the setae. Katepisternum with 2 strong setae, posterior slightly stronger than anterior, remainder of sclerite with a few short setulae. Proepimeron and proepisternum with 1 seta. Prosternum bare. Scutellum heavily grey pollinose, margin with 4 setulae between apical and lateral setae, 2 between apical setae. Calypteres light golden with a rather dense fringe of a similar colour. Wings light fumose, especially anteriorly. Wing length 4.4mm. Legs entirely black, a ventral brush of golden setulae on fore and hind metatarsi, this extending ventrally along apical third of anterior tibiae.

Male terminalia: ( Figs. 2–4 ): In lateral view epandrium with portion anterior to suture visible as a small rounded lobe. to suture with t10. Cerci membranous, upright and roughly rectangular with a fringe of short setulae on ventral margin and apex. Surstyli visible as a large two pointed process extending postero-ventrally from shell of epandrium, In ventral view a pair of flat, blade-like, pointed processes located at base of cerci, these extending ventrally. Posterior process of hypandrium well developed, reaching to base of cerci. Posterior process of surstylus with two pointed, medially directed teeth arising from a single basal plate. Ventral tooth the longest, curving dorsally, dorsal tooth with a small rounded basal process and a more pointed sub-apical process. Parameres long and broad, apical half with a group of long setulae and numerous denticles, ventral margin with large teeth and numerous serrations. Ventral process large, reaching more than half way from base of cerci to apex of paramere, bearing a row of short setulae. Phallus, a small simple structure similar to that of L. mbeya ( Fig. 8 ).

Type material: Holotype ♂ KENYA. 30 Km NE of Kericho, 10.xi.1983. A. Freidberg. ( TAUI)

Etymology: The specific epithet refers to the shape of the parameres which resemble the antlers of a fallow deer Dama dama L.

Figures

FIGURES 2–4. Lonchaea dama sp. nov. 2. Epandrium and associated structures lateral view. 3.same ventral view. 4. Paramere lateral view. Cerc = Cercus, Sur = surstylus, V pro = ventral process, Epand. = epandrium, para = paramere, t10 = tergite 10, as = anterior sclerite.

FIGURES 5–8. Lonchaea mbeya sp. nov. 5. Epandrium and associated structures ventral view (parameres and phallus removed). 6. Same posterior view. 7. Paramere lateral view. 8. Phallus lateral view.