Fulgenta bilobata, Macgowan, Iain, 2017

Macgowan, Iain, 2017, A new genus and species within the tribe Earomyiini (Diptera, Lonchaeidae), Zootaxa 4216 (3), pp. 201-224 : 208-209

Fulgenta bilobata sp. nov.

( Figs. 10–13 )

Description. Male: Head: Eyes bare. Frons sub-shining black, dulled by microsculpture, frontal and interfrontal setulae very short. Orbital plate shining black, bare apart from orbital seta. Lunule, base colour brown covered in silver pollinosity which extends more thinly over parafacial and dorsal part of face. Anterior genal setulae in a single row of 5 along mouth margin. Antennae entirely black, 1st flagellomere length to depth ratio 1.5:1. Arista short plumose; ratio of plumosity at maximum extent to depth of 1st flagellomere 0.5:1.

Thora x: mesonotum shining dark emerald-green, anepisternum and katepisternum darker with bronze-green reflections. Anepisternum with 1 anterodorsal and 2 posterior setae. Katepisternum with 1 dorsal seta, 2–3 setulae lying anterior to it and a further 2–3 on anterior part of sclerite. 1 seta on both proepimeron and proepisternum. Scutellum shining emerald-green, on margin between lateral and apical setae with 2 tiny setulae, no setulae between apical setae. Calypteres pale with whitish fringes Wing slightly yellowish anteriorly, wing length 2.5mm. Legs black, all basal and 2nd tarsomeres pale, apical tarsomeres darkened.

Male terminalia: Epandrium with 9th and 10th terga not completely fused, 9th terga a broad rounded lobe attached to anterior surface of, and approximately 0.8x as wide as 10th terga, 10th terga 4x as wide as high. Cerci; elongated laminate structures, lying parallel to, and as long as epandrium. In posterior view relatively broad with broad slightly concave apices, fused for most of their length apart from apical quarter, densely covered in fine setulae. Basally with a pair of laterally directed, bluntly pointed secondary lobes. Surstyli rudimentary, attached to rod-like process emanating from base of cerci, laminate basally with row of four setulae, apically forming a circular process covered in relatively dense setulae. Phallus a complex vase-like structure, basiphallus with a pair of short tooth-like processes and a longer narrow apical section.

Type material. Holotype ♂. DEMOCRATIC REPUBLIC of CONGO; Likombo Forest , lowland evergreen primary forest, 20–22.v.2010, leg. A. Kirk-Spriggs, ( NMBO).

Paratype; CAMEROON; Rt. N9 20 Km E. of Sangmélima , 7.xi.1987, A. Freidberg. 1♂, ( TAUI).

Differential diagnosis. The shape of the cerci with their distinctive basal lobes and the distinctive vase shaped phallus serve to easily distinguish this species from other species in the genus.

Etymology. The specific epithet refers to the presence of additional basal lobes on the cerci.

Figures

FIGURES 10 – 13. Fulgenta bilobata sp. nov. 10. Epandrium and associated structures, posterior view. 11. Same, lateral view. 12. Epandrium, internal view showing surstylus and associated structures. 13. Phallus, lateral view.