Balticobaetisca bispinata sp. nov., holotype, male subimago. Baltic amber (Eocene), coll. CCHH, BaB 1373/1. A Total dorsal view; B total ventral view; C head and thorax in dorsal view: MPs – medioparapsidal suture; MLs – median longitudinal suture; MNs – mesonotal suture; LPs – lateroparapsidal sutur. D head and thorax in ventral view: BSp – probasisternal bispinate projection, AES – anepisternum; KES – katepisternum; BS – mesobasisternum; FSp – mesofurcasternal protuberance; left foreleg: cx – coxa, tr – trochanter, fe –femur, ti – tibia, ta – tarsus; 1–5 – tarsal segments, cl – pretarsal claw.

  Part of: Staniczek AH, Storari AP, Godunko RJ (2022) Revised systematics, phylogeny, and paleontology of the mayfly family Baetiscidae (Insecta: Ephemeroptera). Arthropod Systematics & Phylogeny 80: 389-409.