Acrocerinae is a subfamily of small-headed flies in the family Acroceridae. Their larvae are endoparasites of araneomorph spiders, with the exception of Carvalhoa appendiculata which can develop as ectoparasitoids on their host spiders. Traditionally, the subfamily included the genera now placed in Cyrtinae and Ogcodinae, but the subfamily in this sense was found to be polyphyletic and was split up in 2019.
Ironomyiidae is a small family of flies in the order Diptera. Historically, they had been included in the family Platypezidae, and includes three extant species within the single extant genus Ironomyia endemic to Australia and a number of extinct fossil genera from North America and Asia extending back to the Early Cretaceous.
Apystomyia is a genus of flies in the family Apystomyiidae. The genus contains the single living Apystomyiidae species, Apystomyia elinguis, which is primarily found in California. Details of its life history are largely unknown. The extinct genus Hilarimorphites is known from the Cretaceous Burmese and New Jersey ambers. Formerly placed in the Asiloidea, molecular phylogenetic studies in 2010 placed the genus unambiguously as a sister of the Cyclorrhapha within the clade Eremoneura.
Philopotinae is a subfamily of small-headed flies. They have an arched body shape, as well as enlarged postpronotal lobes that form a collar behind the head. Their larvae are endoparasites of araneomorph spiders in the subgroup Entelegynae.
Apystomyiidae is a small family of flies containing the living genus Apystomyia and the extinct genera Apystomimus and Hilarimorphites. The single living Apystomyiidae species, Apystomyia elinguis, is native to California. Species of Hilarimorphites have been described from Mid to late Cretaceous Burmese and New Jersey ambers, while the single Apystomimus species is from the Late Jurassic of Kazakhstan.
Archocyrtus is an extinct genus of small-headed flies in the family Acroceridae. The genus is known from compression fossils from the Late Jurassic Karabastau Formation of Kazakhstan. The genus is the only member of the subfamily Archocyrtinae.
Cyrtinella is an extinct genus of small-headed flies in the family Acroceridae. The genus is known from Baltic amber from the Eocene of Poland and Kaliningrad Oblast, Russia. It contains only one species, Cyrtinella flavinigra.
Glaesoncodes is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene, though the locality is unknown. It contains only one species, Glaesoncodes completinervis.
Villalites is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene, though the locality is unknown. It contains only one species, Villalites electrica.
Burmacyrtus is an extinct genus of small-headed flies of uncertain placement. The genus is known from Upper Cretaceous fossils in amber from Myanmar. It contains only one species, Burmacyrtus rusmithi.
Archaeterphis is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene, though the locality is unknown. It contains only one species, Archaeterphis hennigi.
Eulonchiella is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene, though the locality is unknown. It contains only one species, Eulonchiella eocenica.
Hoffeinsomyia is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene of Kaliningrad Oblast, Russia. It contains only one species, Hoffeinsomyia leptogaster.
Prophilopota is an extinct genus of small-headed flies in the family Acroceridae. It is known from Baltic amber from the Eocene.
2017 in paleoentomology is a list of new fossil insect taxa that were described during the year 2017, as well as other significant discoveries and events related to paleoentomology that were scheduled to occur during the year.
Cyrtinae is a subfamily of the Acroceridae. Their larvae are endoparasites of araneomorph spiders in the subgroup Entelegynae.
Burmese amber is fossil resin dating to the early Late Cretaceous Cenomanian age recovered from deposits in the Hukawng Valley of northern Myanmar. It is known for being one of the most diverse Cretaceous age amber paleobiotas, containing rich arthropod fossils, along with uncommon vertebrate fossils and even rare marine inclusions. A mostly complete list of all taxa described up until 2018 can be found in Ross 2018; its supplement Ross 2019b covers most of 2019.
Zhangsolvidae is an extinct family of brachyceran flies known from the Cretaceous period. Members of the family possess a long proboscis, varying in length between 1.3 and 7 mm depending on the species, and were probably nectarivores. A specimen has been found with preserved Bennettitales pollen, suggesting that they acted as pollinators for extinct gymnosperms. They are considered to be members of the Stratiomyomorpha.
Rhagionemestriidae is an extinct family of brachyceran flies known from the Jurassic and Cretaceous periods. It was first named as a subfamily of the Nemestrinidae by Ussatchov (1968), and was raised to full family status by Nagatomi and Yang (1998). They are considered to be closely related to the family Acroceridae. Similar to Acroceridae, members of the family possess a large hemispherical head, with eyes covering nearly all of the area.
Valeseguyidae is a family of flies, belonging to Scatopsoidea. It contains only one known extant species, Valeseguya rieki, known from a single male specimen found in Victoria, Australia, described in 1990. It was initially classified as a member of the wood gnat family Mycetobiidae, but was later given its own family in 2006. Two fossil species are known, including another species of Valeseguya, V. disjuncta, which is known from Miocene aged Dominican amber from the Caribbean, and Cretoseguya, containing the single species C. burmitica, which is known from the mid-Cretaceous Burmese amber of Myanmar, dating to around 100 million years ago.
