Pleuroseta dorrigonis Kuwahara & Marshall 2022, NEW COMBINATION
Creators: name: Kuwahara, Gregory K.
name: Marshall, Stephen A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sphaeroceridae
Pleuroseta
Pleuroseta dorrigonis

description: Pleuroseta dorrigonis (Richards, 1973) NEW COMBINATION
Leptocera (Biroina) dorrigonis Richards, 1973: 333.
Biroina dorrigonis (Richards), Marshall, 1989: 602; Roháček et al., 2001: 125.
Comments. Richards (1973) originally described this species as a species of Biroina (= Howickia). However, examination of many specimens of “ Biroina dorrigonis ” (Richards, 1973) and photos of the holotype showed that it is a species of Pleuroseta, with three pairs of dorsocentral bristles (the anterior-most pair presutural), a sinuate R 4+5, non-telescopic female terminalia, extremely large male genitalia, maculated legs, a distinct patch of setae on the anepisternum, and the male hypandrium lacking the ventral and posterodorsal apodemes that define Howickia. In Howickia, all dorsocentral bristles are postsutural, R 4+5 is straight or slightly curved, the female terminalia are elongate and telescoping, the male genitalia are not so enlarged, at least the tibiae are not maculated, and the anepisternum is bare.
All of these characters are shared with the type species of Pleuroseta, P. wentworthi Richards, 1973. In his descriptions of “ B. dorrigonis ”, Richards (1973) does not mention how it differs from Pleuroseta, nor did he mention the presence of a lateral patch of setae on the anepisternum. However, the type specimen is externally very similar to the type of P. wentworthi, clearly with the diagnostic patch of setae on the anepisternum and differing only in its darker overall body colouration, distinctly banded legs, and smaller male genitalia. Therefore, “ Biroina ” dorrigonis is here treated as a species of Pleuroseta.
Phylogeny
Character state matrix
The plesiomorphic state is indicated by (0) and the apomorphic state(s) by (1–2). Multistate characters are treated as unordered. Polarity was established using Paralimosina + Eximilimosina as the outgroup. Characters marked with an asterisk are probable homoplasies associated with wing loss, and were excluded from the second analysis. Character numbers found in Figs. 2.1–2.3 correspond to the 33 characters listed below.
Head
1. Colour: (0) brown to black; (1) yellow to reddish-orange
2. Frons: (0) without stripes; (1) with microtomentose stripes
3. Interfrontal bristles: (0) 3; (1) 4–5; (2) 1–2
4. Orbital bristles: (0) 2; (1) 1; (2) 0
5. *Ocelli: (0) present; (1) absent or significantly reduced
Thorax
6. Colour: (0) brown to black; (1) yellow to reddish-orange
7. Dorsocentral bristles: (0) 2 pairs; (1) 1 pair
8. Acrostichal setulae: (0) 8 rows; (1) 10–12 rows; (2) 4–6 rows
9. *Scutellum: (0) normal, length 0.6–0.7x width; (1) broad, length 0.3–0.5x width
Legs
10. *Mid tibia: (0) distal half with 3 dorsal bristles; (1) distal half with 2 dorsal bristles
11. Male mid tibia, apicoventral comb: (0) absent; (1) present
12. Male mid tibia, stout apicoventral bristle: (0) present; (1) absent
description: Published as part of Kuwahara, Gregory K. & Marshall, Stephen A., 2022, A revision of the Australian species of Howickia Richards (Diptera: Sphaeroceridae: Limosininae), pp. 1-152 in Zootaxa 5192 (1) on page 10, DOI: 10.11646/zootaxa.5192.1.1, http://zenodo.org/record/7138639