Relict-family
Guides
Hesperinus
Hesperinus is the sole genus in the relict family Hesperinidae, a small group of nematoceran flies in the infraorder Bibionomorpha. The genus contains approximately 8 extant species distributed primarily across the Palaearctic region, with single species in the Nearctic and Neotropical regions. Three fossil species have been described from Eocene Baltic amber. The family represents a phylogenetically isolated lineage with limited ecological and biological documentation.
Protanyderus margarita
Protanyderus margarita is a species of primitive crane fly in the family Tanyderidae, described by Charles Paul Alexander in 1948. Tanyderidae is a small, relict family of Diptera with limited modern diversity, often referred to as primitive crane flies due to their retention of ancestral characteristics. The genus Protanyderus represents one of the more widespread tanyderid genera, with species distributed across various regions.