Browsing by Author "Amorim, Dalton de Souza."
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Item Amber fossil Scatopsidae (Diptera, Psychodomorpha). 1, Considerations on described taxa, Procolobostema roseni, new species, from Dominican amber, and the position of Procolobostema in the family. American Museum novitates ; no. 3227(New York, NY : American Museum of Natural History, 1998) Amorim, Dalton de Souza."The fossil Scatopsidae are reviewed. For Meunier's species in Eocene Baltic amber: Scatopse fasciola Meunier is transferred to Ectaetia; Scatopse subsimilis Meunier is transferred to Rhegmoclemina; and Scatopse grassaris Meunier and Scatopse crassicornis Meunier are considered unplaced in the Scatopsidae. Protoscatopse jurassica Rohdendorf and Mesoscatopse rohdendorfi Kovalev are kept as Scatopsoidea incertae sedis. The generic placement of Reichertella fasciata Melander is retained. Scatopse bilaminata Cook and S. primula Cook from Upper Miocene/Lower Oligocene Chiapas amber are removed to Rhegmoclematini incertae sedis. Procolobostema is accepted as a valid genus. Procolobostema longicorne Cook is synonymized with P. hurdi Cook. Procolobostema incisum Cook and P. obscurum are also indicated as possible junior synonyms of P. hurdi Cook. A new species of the genus Procolobostema Cook is described based on large series of males and females in Dominican Republic amber (early Miocene). The differences between the Chiapas and the Dominican Republic species of the genus are considered. The phylogenetic position of the genus in the Scatopsidae is discussed. Procolobostema certainly belongs to the Colobostematini. Borneoscatopse Freeman, known from a single Recent species described from one male from the Oriental Region, is considered the sister group of Procolobostema. This corresponds to an Oriental Region/Caribbean biogeographical component, similar to that seen in Valeseguya (Anisopodidae). This may correspond to a more general pattern of distribution, which could be related to the geological evolution of a fragmented Pacifica continent. Because Mexico and Hispaniola were already separated at the Miocene, independent extinction would have to be admitted for these species of Procolobostema"--P. [1]-2.Item First species of Inbiomyia from the Atlantic Forest of Brazil (Diptera, Inbiomyiidae). (American Museum novitates, no. 3935)(American Museum of Natural History., 2019-08-12) Riccardi, Paula Raile.; Amorim, Dalton de Souza.We describe and illustrate Inbiomyia azevedoi, sp. nov., the first species of Inbiomyiidae known from the Atlantic Forest in southeastern Brazil. SEM photos show that the bifurcated labella have on their ventral face rows of scalelike rasping teeth that may be used to graze on green algae, as the gut content of some specimens suggest. A reanalysis of the phylogeny of the genus using Australimyza mcalpineorum as designated outgroup and including I. azevedoi shows that all four groups of species previously proposed for the genus are monophyletic if I. anodonta is removed from the scoliostylus group. Inbiomyia anodonta and I. azevedoi are here transferred to the anemosyris group. In our results with implied weight, I. exul is sister to a clade including all other species of the genus, while the scoliostylus group appears as sister to the clade (mcalpineourum group + anemosyris group).Item A new species of Eumanota Edwards (Diptera, Mycetophilidae, Manotine) from Colombia : evidence for a pseudogondwanan pattern. (American Museum novitates, no. 3915)(American Museum of Natural History., 2018-12-18) Amorim, Dalton de Souza.; Oliveira, Sarah S.; Henao-Sepulvéda, Andrea C.Eumanota wolffae, sp. nov., is described from the high Andean forests of Colombia. This is the first Neotropical species of the clade of non-Manota genera of the mycetophilid subfamily Manotinae--to date known entirely from the Oriental and the northwestern Australasian regions, and in Baltic amber. With the other species of Eumanota Edwards, this species shares, among other features, a largely developed third maxillary palpomere, projecting beyond the base of fourth palpomere, with a wide sensorial pit, a flat inner face, and the last palpomere at least 4x the length of the fourth palpomere. The systematic position of the Colombian species within the Manotinae is addressed. The biogeographic significance of Eumanota in the Neotropical region is discussed, interpreted here as a concurrent incidence of a circumtropical pattern and Gondwanan distributions, in other words, a particular pattern of biogeographic pseudocongruence, referred to here as a "pseudogondwanan pattern." This pattern is associated with an early Cenozoic tropical biota over Laurasian terranes that expanded its distribution to the south (in the Americas, Africa, and Australasia), followed by large-scale extinction of Nearctic and Palearctic representatives due to global cooling in the Neogene. A discussion is provided about the correlation between these patterns and evidence of Late Cretaceous-Paleogene tropical floras over Laurasian terranes.Item Puyehuemyia chandleri, gen. nov., sp. nov. (Diptera, Opetiidae) : remnant of a Cretaceous biota in Chile. (American Museum novitates, no. 3892)(American Museum of Natural History., 2018-02-21) Amorim, Dalton de Souza.; Silva, Vera Cristina.; Brown, Brian Victor.The first Opetiidae known from the Southern Hemisphere is described--Puyehuemyia chandleri, gen. nov., sp. nov.--based on a female specimen collected in Valdivian forest in the Province of Osorno, south Chile. The Palearctic species Opetia nigra Meigen was also studied, allowing detailed comparisons. Features of the antenna, mouthparts, wing, and terminalia allowed the issue of the position of the family within the Eremoneura to be revisited. The inclusion of Opetiidae in the Platypezoidea is corroborated, possibly in a clade also including Lonchopteridae and Phoridae. The 3-articled condition of the styluslike arista in Puyehuemyia corroborates the hypothesis that the 2-articled condition in Opetia is independently derived, as it is in the Empidoidea and many schizophorans. Puyehuemyia chandleri has female terminalia typical of parasitoid groups, as does Opetia, although their life history is not known. Described Platypezoidea Cretaceous amber fossils are reviewed, and Lonchopterites is considered to be sister to the crown group of Opetiidae. The presence of an Early Cretaceous biogeographical layer in the Valdivian forest, associated with plant and animals disjunct from New Zealand, and similar to the beech forests in the Northern Hemisphere, is discussed.