Inpaichthys kerri n. g. n. sp., um novo peixe caracídeo do alto rio Aripuanã, Mato Grosso, Brasil

Abstract

lnpaichthys kerri n. g. n. sp., um novo peixe caracídeo do alto no Aripuanã, Mato Grosso, Brasil Resumo ~ descrito um novo peixe caracídeo (Pic;ces, Cypriniformes, Characoidei) pertencente a um novo g~nero Inpaichthys kerri n. g . n sp ., coletado p~rto da Estação do Núcleo Aripuanã do Instituto Nacbnal de Pesquisas da Amazônia (INPA), ao Norte de Mato Grosso, Brasil . A espécie nova possui linha lateral incompleta e nadadeira caudal nua. Os dentes são tricuspidados, em duas séries muito irregulares no pré-maxilar; a série interna geralmente composta de somente dois ãentes medianos em cada lado . A maxila é dentada em metade de sua borda., geralmente com 7 a 8 dentes tricuspidados e cônicos. Esta dentição, em combinação com ou. tras características morfológicas descritas no tra. balho, düere o Inpaichthys dos outros gêneros da subfamllia Tetragonopterinae.

Molecular phylogeny of Aphyocharacinae (Characiformes, Characidae) with morphological diagnoses for the subfamily and recognized genera

“…The genera Rachoviscus and Leptagoniates were provisionally placed in the subfamily following previous reports published in the literature (e.g. Géry, 1977;Géry and Junk, 1977). Three synapomorphies supported the monophyly of Aphyocharacinae: (1) presence of synchondral articulation between lateral ethmoid and anterodorsal border of orbitosphenoid; (2) fourth infraorbital absent or much reduced and bordered posteriorly by third and fifth infraorbitals; and (3) six or less branched pelvic-fin rays (Mirande, 2010).…”

“…As reported by Mirande (2010), Rachoviscus was provisionally included within Aphyocharacinae based on general similarity between R. crassiceps and Inpaichthys kerri in overall body shape, coloration and, as previously noted by Géry and Junk (1977), the presence of non-aligned premaxillary teeth. This latter trait, in particular, is notable as it is also present in Hollandichthys multifasciatus, and may therefore represent evidence for close Mirande (2010) also suggested that Inpaichthys be included within Aphyocharacinae based on three morphological synapomorphies.…”

“…Although he placed Aphyocharax in the monotypical subfamily Aphyocharacinae, Géry (1977) did note similarities between Aphyocharax and a newly created subfamily Paragoniatinae, in which he placed Rachoviscus, Paragoniates, Phenagoniates, Leptagoniates, Xenagoniates and Prionobrama. Géry and Junk (1977) described a new genus and species, Inpaichthys kerri, indicating its general resemblance with Rachoviscus crassiceps and ''Paragoniates et al'' (''et al'' possibly referring to the other species of Paragoniatinae).…”

Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy

“…The first of these characters is coded as polymorphic for P. alburnus, considering possible intraspecific variations. A variable presence of one or two premaxillary tooth rows was mentioned in the description of Inpaichthys kerri (Géry & Junk, 1977). In the observed specimens all the premaxillary teeth have extraosseous development and would be homologous to the teeth from the inner row of other species.…”

New species of Trachycorystes Bleeker, with comments on other species of the genus (Ostariophysi: Siluriformes: Auchenipteridae)

“…At that time it was quite noticeable that the fish fauna above the waterfalls was distinct from the fauna below, indicating that the falls act as an effective barrier to the movement of fishes in both directions. On the basis of material collected above the falls several new fishes were described, including Inpaichthys kerri, a new species and genus of Characidae proposed by Géry & Junk (1977).…”