Thereotricha agapa BLAGODEROV & GRIMALDI 2004, new species

• Main Authors: BLAGODEROV, VLADIMIR, GRIMALDI, DAVID
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Diptera; Diadocidiidae; Thereotricha; Thereotricha agapa; Taimyr
• Online Access: https://doi.org/10.5281/zenodo.5060456; http://treatment.plazi.org/id/039A87C9FF89FF94FD5FFE00FD28FB56

? Thereotricha agapa , new species Figures 5, 6, Plate 1C DIAGNOSIS: Three ocelli, touching. Wing membrane with scattered macrotrichia. RS base transverse, shorter than r­m. M 2 probably absent. DESCRIPTION: Body length = 1.56 mm (rest, estimated length 1.87 mm); wing length 1.48 mm. Partly preserved specimen. Head: Occiput and vertex with straight and curved setae. Three ocelli present, each on its own mound, the latter fused by contacting edges. Eyes bare, with incomplete bridge, deeply emarginate at antennal base. Frontal furrow and keels well developed. Scape and pedicel as long as flagellomeres. Flagellum 14­segmented, flagellomeres barrel­shaped, length about 1.5Χ the width, with few strong setae and numerous fine trichia. Clypeus setose. Palpi 4­segmented, short. Antepenultimate palpomere with dosomedial round sensory pit. Thorax: Proepisternum with 3 long and and 11 shorter setae. Proepimeron touches episternum at the episternal suture, katepisternum with shallow excavation below the point. Anepisternum less than katepisternum, the latter with several trichia in lower part. Laterotergite bare, divided with katepisternum by anepimeron. Mediotergite bare. Metepisternum setose. Scutum with scattered setae. Scutellum with 6 long setae. Wing membrane with microtrichia and macrotrichia mostly in apical and hind area. Costa, R 1, and R 5 with long setae. Sc very short, ends free. R 1 and R 5 almost straight. RS base short, ~0.5Χ r­m length, transverse; r­m fused with tb and m­cu, slightly oblique. Crossvein m­ cu twice the length of r­m. M 2 probably absent. M 3+4 absent. M 1 straight, weak. MATERIAL: Holotype PIN 3426 /256, sex unknown. Russia, Taimyr Peninsula, Nizhnyaya Agapa, coll. 1973. ETYMOLOGY: The species is an epithet in reference to the locality, the Nizhnyaya Agapa River. COMMENTS: Structure of ocelli and a transverse RS base are apparent characters of generic level, distinguishing the species from T. sibirica , but incomplete preservation of the specimen from Nizhnyaya Agapa does not allow ...