Ceratomerus hibernus Bradley J Sinclair 2003, n.sp.
Creators: name: Sinclair, Bradley J
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Brachystomatidae
Ceratomerus
Ceratomerus hibernus

description: <i>Ceratomerus hibernus</i> n.sp. Figs. 78, 79, 81, 100 <b>Type material</b>. HOLOTYPE &amp;female;, “ AUST [ralia]: TAS[mania]: Pelion Hut / 3 km S Mt. Oakleigh / 41°50'S 146°03'E, 860 m / June 1990; I.D. Naumann ”; “ HOLOTYPE / <i>Ceratomerus</i> / <i>hibernus</i> / Sinclair [red label]” (ANIC). PARATYPES: <b>Tasmania:</b> 6&amp;female;&amp;female;, same data as holotype (ANIC); 6&amp;female;&amp;female;, 28 km SSW Mole Ck, 570 m, MAP 8114 355.752, 15.x.1985, L. Hill (AMS, ZFMK). <b>Diagnosis</b>. Distinguished from other species in this group by the short postocellar setae, long pedicel (three-fifths length of scape) and median fork separated from radial fork by more than the length of crossvein dm-cu. <b>Description</b>. Wing length 3–3.3 mm, similar to <i>C. falcatus</i> except as follows: <b>Female</b>. <i>Head</i> dark brown; postocellar bristle slender, less than half length of ocellar bristle; 3 pairs of long vertical bristles, third pair distant from others; postocular bristles long, overlapping at least one-third of eye. Antenna with scape equal to height of eye, with 2–3 long, dorsal setae and 1 long ventral seta; pedicel with short basal section, three-fifths length of scape, with posterior fringe of long setae; postpedicel apical half strongly tapered, extending parallel-sided to short, stout, three-segmented stylus, subequal to one-third length of postpedicel. Palpus light brown, slender, one-fifth length of labrum. <i>Thorax</i>. Mesonotum, pleura and postnotum brown; 1 slender, short pal. Antepronotum with 2 short setulae. <i>Wing</i> (Fig. 81). Medial fork proximal to radial fork by more than length of crossvein dm-cu. Halter with dark knob. <i>Legs</i>. Coxae and basal half of femora yellowish-brown, remaining leg segments brown, gradually darkening towards tip. Fore coxa lacking modified setae. Fore femur slightly swollen, lacking modified ventral setae. Fore tibia nearly equal in length to femur; apex with undilated anteroapical comb. First tarsomere slightly longer than half length of fore tibia; distal 4 tarsomeres slender, longer than first tarsomere. Mid tibia slightly shorter than femur with dorsal and ventral apical seta. First tarsomere shorter than remaining 4 tarsomeres. Hind tibia with 3–4 erect ad setae on apical half; lacking dorsal setae. <i>Abdomen</i> as in female <i>C. falcatus</i>. <i>Terminalia</i> (Fig. 79).Anterior margin ofT10 bearing biserial row of stout, straight spine-like setae; cercus with slender setae, lacking spine-like setae. Spermathecal receptacle spherical, with very short neck where duct attached (Fig. 78). <b>Male</b>. Unknown. <b>Distribution</b>. This species is known only from the northwestern highlands of Tasmania (Fig. 100) and is possibly restricted to the cooler months (June, October). <b>Etymology</b>. The specific name is from the Latin <i>hibernus</i> (of winter), referring to the probable seasonality of this species. <b>Remarks</b>. It is normally not recommended to describe a new species on the basis of female specimens alone. But given the long series of specimens and its apparent differences with <i>C. ordinatus</i> (the only other species of the <i>C. ordinatus</i> group in Tasmania), it was considered best to described this species to encourage “off season collecting” in the hope that conspecific males may someday be obtained.
description: Published as part of <i>Bradley J Sinclair, 2003, Taxonomy, Phylogeny and Zoogeography of the Subfamily Ceratomerinae of Australia (Diptera: Empidoidea), pp. 1-44 in Records of the Australian Museum 55</i> on page 29