Myiodoriops marginalis Townsend

Inclan, Diego J. & Stireman, John O., 2014, A new species and synonymy of the Neotropical Eucelatoria Townsend and redescription of Myiodoriops Townsend, ZooKeys 464, pp. 63-97 : 80-81

Taxon classification Animalia Diptera Tachinidae

Myiodoriops marginalis Townsend Figs 12, 13, 14, 15

Myiodoriops marginalis Townsend, 1935: 227; Guimarães 1971: 141.

Erythromelana marginalis (Townsend): Wood 1985: 39-40; Inclán and Stireman 2013.

Type material.

Holotype male labeled: “HOLO-/TYPE”, "Type [red label]", “Pariká / Ruhununí / B. Guiana/ Jan. 1934 [hand written]", "Mycos/ 4401 [hand written]", "Press. By/ J.G. Myers/ B.M. 1940-24" " Myiodoriops / marginalis TT [hand written]/ DetCHTT ♂", " Myiodoriops / marginalis Townsend/ det. D.J. Inclán / & J.O. Stireman" (BNHM).

Other material examined.

Seven specimens examined. 1 male labeled: "St. Augustine,/ Trinidad, BWI./ 1. 24. 60", " Myiodoriops / marginalis [hand written]", “DI240CA” (CNC). 1 male labeled: "St. Augustine,/ Trinidad, BWI./ JAN 8 1960", "F. D. Bennett/ Collector", "X P. (77)/ near/ Myiodoriops [hand written]", " Myiodoriops / marginalis Townsend/ det. D.J. Inclán / & J.O. Stireman", “DI241CA” (CNC). 1 male labeled: "PIARCO/ Trinidad, BWI./ OCT. 29. 1953.", "Collector/ F. J. Simmonds", "77 [hand written]", " Myiodoriops / n. sp. ♂ [hand written]", " Myiodoriops / marginalis Townsend/ det. D.J. Inclán / & J.O. Stireman", “DI243CA” (CNC). 1 female labeled, same as previous except by "OCT. 29. 1953", without sp. ID, “DI74CA” CNC. 1 male labeled: "W. ARIMA/ TRINIDAD/ 26-8-1964", " Myiodoriops / marginalis Townsend/ det. D.J. Inclán / & J.O. Stireman", “DI73CA” (CNC). 1 female labeled: "St. Augustine,/ Trinidad, BWI./ II. 17. 60", " Myiodoriops / marginalis Townsend/ det. D.J. Inclán / & J.O. Stireman", “DI39CA” (CNC). 1 female labeled: same as previous except by "II. 28. 60", “DI236CA” (CNC).

Recognition.

See diagnostic section for the genus Myiodoriops .

Redescription.

Redescribed from 5 males (including the type Myiodoriops marginalis ) and 3 females.

Length: males, 5.1-5.8 mm (x = 5.42 mm); females, 3.9-4.53 mm (x = 4.21 mm).

As described for the genus except:

Head (Fig. 13): Eye sparsely haired, ommatrichia short, about as long as 2-3 eye facets. Eye 0.85-0.87 head height in male, 0.83-0.88 in female. Vertex width 0.20-0.22 head width in male, 0.24-0.27 in female. Width of frontal vitta 0.25-0.30 vertex width in male, 0.28-0.43 in female. Length of first flagellomere 0.38-0.46 head height in male, 0.39-0.45 in female. Pedicel length 0.31-0.37 length of first flagellomere in male, 0.28-0.36 in female.

Geographic distribution and seasonal occurrence.

Specimens of Myiodoriops marginalis have been collected only from Guyana in northern South America, and from the southern Caribbean islands of Trinidad and Tobago (Fig. 12). All collections are from lowland tropical forest. Adults have been collected mainly in January, but also in February, August and October.