Cawthronia nigra Tonnoir

Jaschhof, Mathias & Kallweit, Uwe, 2009, The Cycloneura Marshall group of genera in New Zealand (Diptera: Mycetophilidae: Leiini), Zootaxa 2090, pp. 1-39 : 29-31

publication ID	https://doi.org/ 10.5281/zenodo.187484
publication LSID	lsid:zoobank.org:pub:9B75D8C6-2173-49D5-B9BD-912634EA1FF7
DOI	https://doi.org/10.5281/zenodo.6226375
persistent identifier	https://treatment.plazi.org/id/3431316A-FFAD-FF99-FF50-C053FE8FFDBD
treatment provided by	Plazi
scientific name	Cawthronia nigra Tonnoir
status

Treatment

Cawthronia nigra Tonnoir View in CoL in Tonnoir & Edwards 1927

( Figs 8 View FIGURES 5 – 8 , 9 View FIGURES 9 – 12 , 22 View FIGURES 19 – 25 , 28 View FIGURES 26 – 29 , 36 View FIGURES 34 – 37 , 42 View FIGURES 40 – 44 , 80–89 View FIGURES 80 – 89 )

Tonnoir & Edwards 1927: 826 (description female), plt. 62, fig. 72 (photo wing).

Holotype. Female, Nelson [South Island], 1 Nov. 1923, A.L. Tonnoir leg. In NZAC (specimen seen).

Diagnosis. This is the only species of Cawthronia and thus recognizable readily by the generic characters. Description. Male. Head. Fig. 8 View FIGURES 5 – 8 . Nodes of antennal flagellomeres 0.9–1.2 times as long as wide ( Figs 86, 89 View FIGURES 80 – 89 ). Apical segment of maxillary palpus less than twice the length of preceding segment.

Thorax. Fig. 36 View FIGURES 34 – 37 . Wing. Fig. 22 View FIGURES 19 – 25 . Length 1.9–2.3 mm.

Terminalia. Tergite 9 subtriangular, vaguely 2-pointed, with slight apicomesal depression, with setae of various sizes including very large apical and basolateral setae ( Fig. 88 View FIGURES 80 – 89 ). Gonocoxites apically with 1 large dorsomesal seta and 2 smaller ventromesal setae, and setae of various sizes elsewhere ( Figs 83, 85 View FIGURES 80 – 89 ). Gonostylus with setae of various sizes including 1 very large dorsomesal seta, and 1 flat, subtriangular apical spine ( Figs 80–82 View FIGURES 80 – 89 ). Parameres emarginate apicoventrally, sclerotized and finely serrate apicolaterally ( Fig. 84 View FIGURES 80 – 89 ). Ejaculatory apodeme slightly shorter than parameres, with weakly sclerotized, circular apical extension ( Fig. 84 View FIGURES 80 – 89 ).

Redescription. Female. Wing. Length 1.9–2.5 mm. Head. Nodes of antennal flagellomeres 0.5 times as long as wide ( Fig. 87 View FIGURES 80 – 89 ).

Terminalia. Basicercus longer than disticercus, both segments with numerous short, thick dorsal setulae ( Fig. 42 View FIGURES 40 – 44 ).

Distribution and phenology. Endemic to NZ: SO (NN, BR, NC, MC, SL). Confined to South Island. Adults collected in beech, podocarp and mixed beech/podocarp forests up to an altitude of 800 m above sea level. Adult activity almost throughout the year, but no findings known from February, March and July.

Material studied. SO. NN: 6 (4*) males, Kahurangi N. P., Takaka R. valley (Cobb dam road), 31 Aug.–7 Oct. 2001, M. & C. Jaschhof; BR: 18 (2*) males, 9 (3*) females, Cass, Middle Bush, 9 April 1998, P.M. Johns; 4* males, 4* females, same loc. but 11 April 1998; 3 males, 1 female, same loc. but 30 May 1998; 1* male, Maruia F., Shenandoah Saddle, 3–25 Nov. 2001, M. & C. Jaschhof; NC: 3 males, Arthur´s Pass N. P., Bealey Spur, Waimakariri Track, 19 May–13 June 2001, M. & C. Jaschhof; MC: 1* male, Craigieburn F. P., Broken R. skifield road, 4 Dec. 2001, M. Jaschhof; SL: 1 male, Catlins, Purakaunui Scenic Res., 30 Jan. 2002, M. Jaschhof.