Calyxochaetus fortunatus

Runyon, Justin B., 2024, Revision of the genus Calyxochaetus Bigot (Diptera: Dolichopodidae: Sympycninae), Zootaxa 5539 (1), pp. 1-74 : 37

Calyxochaetus fortunatus species group

Diagnosis. The C. fortunatus species group is defined by males having fore tarsomere 1 very short, a swollen fore tibia ( Figs 82–86 ), and fore tarsomere 2 with slender distally directed anterior seta near apex ( Fig. 83 ). Males have the posterior wing margin weakly to strongly lobed and/or excavated ( Figs 88–91 ) and with eyes contiguous or nearly contiguous (<1 ommatidium wide) below antennae. Females have a relatively narrow face that is subequal to postpedicel width. Scutellum without distinct blue-violet reflections (sometimes weakly blue-violet).

Figures

FIGURES 77–91. Male antennae (lateral view), legs and wings of the Calyxochaetus fortunatus species group. 77. C. cascadia sp. nov. 78. C. fortunatus (Wheeler). 79. C. oreas (Wheeler). 80. C. vegetus (Wheeler). 81. C. leptofortunatus sp. nov. 82. C. cascadia sp. nov., fore tibia and tarsus, anterior view. 83. C. fortunatus, fore tibia and tarsus, anterior view.Arrow shows distally directed anterior seta at apex of tarsomere 2. 84. C. leptofortunatus sp. nov., fore tibia and tarsus, anterior view. 85. C. oreas, fore tibia and tarsus, posterior view. 86. C. vegetus, fore tibia and tarsus, posterior view. 87. C. vegetus, mid tarsus, ventral view. 88. C. cascadia sp. nov. 89. C. fortunatus. 90. C. oreas. 91. C. vegetus. Scale bars = 0.5 mm; arista-like styli approximately 1 mm long.