Anabarhynchus ravenshoensis Ferguson

Ferguson, David J., Irwin, Michael E. & Yeates, David K., 2013, New species of Anabarhynchus Macquart (Diptera: Therevidae) from arid and monsoon tropical Australia, Zootaxa 3680 (1), pp. 55-95 : 81-84

Anabarhynchus ravenshoensis Ferguson sp. n.

( Figures 20 , 21 , 22 )

Type material. Holotype: Male. AUSTRALIA: North Queensland: 13km W of Ravenshoe, Mt Garnet Rd. N. Qld., 2.v.1967, D.H. Colless, ( ANIC _29:017688) ( ANIC). Condition: Pinned with micro pinned ventrally to pith block; end of abdomen removed for dissection post photography, good condition.

Diagnosis: Lower frons raised upper frons flat with faint rugose-striation. Frons width at anterior ocellus 2.8x ocellus. Mid frons with dark-brown marks angled towards upper frons near meeting at mid-line; lower frons setae arrange slightly wider than width of antenna base. Scutum grey toned pubescence with indistinct lines. Wing cell m3 open. Postspiracular pile present; katepisternum and prosternal furrow without pile. Forefemur 1–2 pd, 2 pv, 1 av; mid-femur 1 pd, 1 pv, 1 av; hind femur 1 av; all femora with appressed pale pile, admix with sparse short black setae.

Description. Male: Body length: 7.5mm. Wing length: 6mm. Head. Integument black. Frons flat, upper frons rugose-striated; frons width at anterior ocellus 2.8x ocellus; ocellar tubercle flat; antennal base positioned low on frons, face and lower frons slightly protruding; parafacials and lower frons bright grey when viewed anterior dorsally; irregular squarish mark beside eye appearing brown when viewed anterodorsal, blackish-brown viewed anteriorly, indistinctly meeting along mid-line; frons setae in two rows, lower frons setae arrange slightly wider than width of antenna base; lower frons setae third length of scape. Scape length 1.86x width; scape and pedicel grey, 1st segment of flagellum brown with several short dark setae to basal dorsal third, flagellar style brown one third length of flagellum. Occiput convex with grey pubescence, several indistinct rows of black macrosetae 24 each side; postocciput area to gena grey with dense, long, pale, hair-like pile. Palpus pale yellow, sparsely supplies with pale hair like pile; labellum brown-grey, prementum without dark setae. Thorax. Integument black. Scutal chaetotaxy black (pairs): np, 4; sa, 2; pa, 1; dc, 2; sc, 2. Scutum with thin brown dorsal line within broader grey band, margined with indistinct brownish-grey line, beside pale grey line, irregular brownish-grey marks margin laterally raised grey areas pre and post-transverse suture; scutal surface with sparse short black setae. Postspiracular pile present; katepisternum and prosternal furrow without pile; pleuron and coxae with grey pubescence; coxa with elongate pale pile admixed with black macrosetae. Wing. Cell m3 open; hyaline with brown tint, dark brown veins; stigma with brown infuscate margin; costal setae beyond humeral cross-vein biserially arranged. Haltere. Pedicel yellow-brown; scabellum dorsally yellow-brown, ventrally buff-white. Legs. Forefemur, 1–2 pd, 2 pv weak, 1av; mid-femur 1 pd, 1 pv, 1 av; hind femur 1 av macrosetae; forefemur dark brown with apically ends pale brown; mid-femur basal half brown, apical end pale brown; hind femora basal two-thirds and dorsally dark brown, apical ventral third pale brown; all femora with appressed pale pile; admix with sparse short black setae; tibiae pale brown apically dark, first tarsomere similar to tibia remaining tarsomeres dark. Abdomen. Integument dark brown and yellow-brown; slightly compressed laterally; anterior bands mottled brown, anteriorly matte brown-grey, with weak appressed dark pile; tergites 2–7 posterolaterally bright grey with appressed pale pile; tergites 2–4 posterior marginal bands when viewed posteriorly are bright white, anteriorly grey; tergites 5–7 with black pile. Terminalia. Epandrium ( Fig. 22 a), yellow-brown almost three times as wide as long slightly narrowing posteriorly. Gonocoxite ( Fig. 22 b), yellow-brown, semi-spherical slightly wider than long when viewed ventrally; posterior ventral edge with broad narrow flange slightly ventrally directed. Joined along hypandrium. Gonocoxal apodeme long moderately sclerotised. Inner gonocoxal process longer than gonostylus, ventrally directed with several large strong setae mixed with weaker on apical inner ventral edge. Gonostylus dorsally directed with several weak setae on basal dorsal surface and inner middle ventral surface directed inward, apex rounded; ventral lobe absent. Aedeagus ( Fig. 22 c, d): distiphallus strongly curved ventrally. Parameral sheath sclerotised. Dorsal apodeme of parameral sheath broadly triangular; inner apical end dorsally directed. Ventral apodeme narrow, apical end flared laterally. Lateral ejaculatory apodeme dorsally broad narrowing ventrally, band-like. Ejaculatory apodeme long, well beyond dorsal apodeme, cylindrical, apical end with lateral flanges.

Female. Unknown.

Etymology. The specific epithet ‘ ravenshoensis’ is derived from the geographic location Ravenshoe, Queensland near where the type specimen was collected.

Comments. Described from a single male specimen collected in May west of Ravenshoe north Queensland.

Keys to couplet 82 in Lyneborg (2001) and readily separated from A. gascoyne Lyneborg by having a grey scutum with indistinct lines; the fore femur with pv macrosetae and midfemur with 1 pd, 1 pv and1 av macrosetae. Can be separated from A. tribulationensis sp. n., by the rouges striation to upper frons, the irregular squarish mark beside eye appearing brown when viewed anterodorsal; blackish-brown when viewed anteriorly and indistinctly meeting along mid-line. The lower frons setae arrange slightly wider than width of antenna base. Forefemur with 1 av and mid-femur with 1 pv.

Closely related to both A. ewamin sp. n., and A. tribulationensis sp. n., and placed with the kroeberi speciesgroup. For femoral macrosetae differences within the kroeberi species-group see Table 1.

Figures

FIGURE 20. Anabarhynchus ravenshoensis sp. n., holotype male, (ANIC _ 29: 017688): lateral view.

FIGURE 21. Anabarhynchus ravenshoensis sp. n., holotype male, (ANIC _ 29: 017688): oblique view, (inset) frontal view showing upper frons rouges striation.

FIGURE 22. Anabarhynchus ravenshoensis sp. n., holotype male terminalia (ANIC _ 29: 017688): A, epandrium, left dorsal view, right ventral view; B, atrium left dorsal view, right ventral view; C, aedeagus, dorsal view; D, aedeagus, lateral view; Scale line = 0.5 mm.