What does this research mean for the field?

A newly identified genus of Neotropical periscelidid flies, Austrocelis, comprises at least eight distinct species in the Amazon Rainforest and shares a probable synapomorphy with the genera Marbenia and Noscutops. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to describe a new genus Austrocelis and its eight new species, contributing to the understanding of dipteran biodiversity in the Amazon.

April 25, 2026Open Access

Description of Austrocelis gen. nov. (Diptera: Periscelididae), including the description of eight new species and the diversity and abundance of the species in different strata of the Amazon Rainforest

Puntos clave

This research aims to describe a new genus Austrocelis and its eight new species, contributing to the understanding of dipteran biodiversity in the Amazon.
Described morphological characters including maxillary palpus, setae, and wing structure.
Recorded the presence of particular traits shared with related genera in Periscelididae.
Illustrated and classified eight newly identified species.
Eight new species of Austrocelis were described and illustrated: A. applanata, A. brachycerca, A. dolichocerca, A. macrocerca, A. obesa, A. quadrata, A. rotunda, A. spinulosa.
Austrocelis is characterized by unique morphological features, enhancing understanding of Neotropical diptera diversity.
The genus is confirmed to be present solely in the Neotropical Region, specifically South America.

Resumen

Abstract Austrocelis gen. nov . is described based on the following characters: maxillary palpus short and spatulate; setae of the head elongate; face protrudent, with the dorsal portion flattened and oblique, and ventral portion shorter and recessed towards the mouth opening; wing banded, with setae present on dorsal surface of vein R 1 ; surstylus differentiated but not articulated; and cercus usually bearing modified setae on ventral surface. The genus is found in the Neotropical Region, so far recorded only from South America, and shares the presence of setulae on vein R 1 with Marbenia Malloch, 1931 and Noscutops Malloch, 1926, a probable synapomorphy uniting this group of Neotropical periscelidid genera. The species Austrocelis applanata sp. nov . (type species), Austrocelis brachycerca sp. nov ., Austrocelis dolichocerca sp. nov ., Austrocelis macrocerca sp. nov ., Austrocelis obesa sp. nov ., Austrocelis quadrata sp. nov ., Austrocelis rotunda sp. nov . and Austrocelis spinulosa sp. nov . are described and illustrated herein.

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