Two new Brazilian predaceous midges of the genus Downeshelea Wirth & Grogan (Diptera: Ceratopogonidae)

Abstract

Two new Brazilian species of Downeshelea Wirth & Gorgan D. fluminensis and D. quasidentica, are described and illustrated

Taxonomic Revision of Neotropical Downeshelea Wirth and Grogan Predaceous Midges (Diptera: Ceratopogonidae)

“…Legs (Figure 36c) brown, hind leg darker, hind tibia slightly darker subbasally, apically; hind tibial comb with six spines. Foretarsomere 1 with one basal, one apical spine; midtarsomere 1 with 1-2 ventral spines; apical Downeshelea quasidentica Felippe-Bauer and Quintelas, 1993 [16]: 37 (male, Brazil); Borkent and Wirth, 1997 [24]: 98 (in World catalog); Borkent and Spinelli, 2000 [25]: 47 (in catalog south of the USA; distribution); Borkent and Spinelli, 2007 [26]: 81 (in Neotropical catalog; distribution); Borkent, 2016 [22]: 124 (in World catalog); Santarém and Felippe-Bauer, 2019 [2]: 17 (Brazilian distribution).…”

“…Morphological terms are from Borkent et al [14]. The antennal ratio was obtained by dividing the combined lengths of the distal five flagellomeres by the combined lengths of the preceding eight flagellomeres for females and the distal four by the preceding nine flagellomeres for males, as was done in our earlier species description of Downeshelea [10,[15][16][17][18][19][20][21]. The distribution of spines on each of tarsomeres 2-4 of all legs are separated by hyphens.…”

“…The female redescription of D. chiapasi was based on additional material from Costa Rica. For species described or redescribed recently [15][16][17][18][19][20][21], we include only the diagnoses, distributions, updated measurements in the table, figures of wing, legs, and spermathecae and illustrations of male genitalia taken from their original publications. Characters to distinguish them from other Downeshelea are in the key.…”

“…22d,e, Figure 24f-h, and Figure 29;Table 1. Downeshelea fluminensis Felippe-Bauer and Quintelas, 1993[16]: 33 (male, Brazil); Borkent and Wirth, 1997[24]: 98 (in World catalog); Borkent and Spinelli, 2000[25]: 47 (in catalog south of the USA; distribution); Borkent and Spinelli, 2007[26]: 80 (in Neotropical catalog; distribution); Huerta et. al., 2012[21]: 65 (Mexico record); Borkent, 2016[22]: 124 (in World catalog); Santarém and Felippe-Bauer, 2019[2]: 16 (Brazilian distribution).…”