Tephrochlamys

Distinguished from similar Heleomyzidae by the specific arrangement of metathoracic setae (0+3 with first suture pair positioned closer to the suture), the subequal length of posterior and anterior metathoracic setae, and the dense hair arrangement between them (more than four rows). The combination of short monochromatic pterostigmas, spine-like costal bristles exceeding hair length, and a single spur on each middle tibia provides additional diagnostic characters. These chaetotaxy and wing features are critical for genus-level identification within Heleomyzidae.

Small flies, body length approximately 5–6 mm. Head with both setae and bristles on the gena. Thorax with setae on the propleura, bare prothorax, and metathoracic setae arranged 0+3 with the first pair of suture setae positioned closer to the suture than to the second pair. Posterior and anterior metathoracic setae nearly equal in length, with more than four rows of hairs between them. Wings with short, monochromatic pterostigmas; costal vein bearing spine-like bristles longer than the hairs. Middle tibiae each with one well-developed spur.

Palearctic region. Distribution records exist for Denmark (DK), Norway (NO), and Sweden (SE).

• Other Heleomyzidae generaSimilar overall body plan and size; distinguished by specific thoracic chaetotaxy patterns, particularly the 0+3 metathoracic setae arrangement and positioning of the first suture pair relative to the suture.

• BugGuide
• Wikipedia
• GBIF taxonomy match
• NCBI Taxonomy
• Catalogue of Life
• Novel Biology for Tephrochlamys rufiventris (Meigen, 1830) (Diptera: Heleomyzidae)