Dexosarcophaga petra Santos & Pape & Mello-Patiu 2022, sp. nov.
Creators: name: Santos, Josenilson Rodrigues dos
name: Pape, Thomas
name: Mello-Patiu, Cátia Antunes de
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Sarcophagidae
Dexosarcophaga
Dexosarcophaga petra

description: Dexosarcophaga petra sp. nov.
urn:lsid:zoobank.org:act: 8111ED83-4557-480F-999C-B35B14922B24
Figs 7, 8A
Diagnosis
Vein R 1 bare. Male: scutellum with a pair of reduced apical setae; vesica rounded with an apical projection in lateral view and rectangular with two projections in inferior part and two thorny projections in superior part in ventral view (Fig. 7D–E); juxta with spines at base (Fig. 7D–E). [Female unknown.]
Etymology
The species epithet ‘ petra ’ should be treated as a noun in apposition. The name is a Latin noun ‘ petra ’, meaning ‘stone’ (= ‘pedra’ in Portuguese) and refers to the type locality of the new species (Trilha Cidade de Pedra).
Material examined
Holotype BRAZIL • 1 ♂; Mato Grosso, Parque Nacional Chapada dos Guimarães, cerrado, Trilha Cidade de Pedra, mirante; 15°24′21.8″ S, 055°50′07.5″ W; 9 Mar.–18 Apr. 2012; Lamas, Nihei and team leg.; Malaise trap; MNRJ [lost].
Paratypes BRAZIL • 1 ♂; same collection data as for holotype; 18 Apr.–2 Jul. 2012; MZUSP [lost] • 1 ♂; Rio de Janeiro, Angra dos Reis, Japuhyba [date not given]; J. Lane and H.S. Lopes leg.; MNRJ [lost].
Description
Male (n=3)
Length: 7–11 mm. Differs from D. phoenix sp. nov. as follows:
Frons about 0.18 × head width at level of ocellar triangle; 9–12 well-developed frontal setae reaching level of apex of pedicel; gena and genal groove with slightly yellowish-silver pollinosity; intra-alars 2+ 2; meral setae 7–9; scutellum with pair of reduced apical setae; T4 with 1–2 pairs of lateral marginal setae; row of about 10 marginal setae on T5; arms of ST5 about half of basal length and inner margin with distinctly projected lobes (Fig. 7A); cercus with apical half curved anteriorly (Fig. 7B); cercal prong rounded (Fig. 7B–C); surstylus narrow, with long setae in apical half (Fig. 7B); vesica with membranous and sclerotized areas, rounded in lateral view with apical projection, rectangular in ventral view with two projections in proximal part and two thorny projections in distal part (Fig. 7D–E); juxta membranous and with spines proximally (Fig. 7D–E); median stylus narrow, with apical spines, shorter than lateral stylus and with base expanded towards ventral and dorsal margins of paraphallus (Fig. 7D– E); lateral stylus narrow, base twisted towards ventral margin of paraphallus and with apical spines (Fig. 7D–E).
Female
Unknown.
Distribution
Brazil (Mato Grosso, Rio de Janeiro).
Remarks
Dexosarcophaga petra sp. nov. is morphologically similar to D. limon sp. nov. (see remarks under that species). There are also similarities with D. malaisei Dodge, 1968 and D. salgada De-Souza, Souza, Soares & Carvalho-Filho, 2020 (De-Souza et al. 2021). Males of these species have cercus curved and vesica mostly rounded. Lopes (1975c) reviewed the morphology of D. malaisei and commented that the terminalia of the holotype were lost apart from syntergosternite 7+8 (= “first genital segment”). However, since the species does not have paratypes and the illustrations of the phallus provided by Dodge (1968: figs 17–18) are sketchy and insufficient for recognizing D. malaisei, we cannot make a detailed morphological comparison between these three nominal species. Consequently, either D. petra or D. salgada could be a junior synonym of D. malaisei, but we will here rely particularly on the shape of the male pregonite and cercus as illustrated by Dodge (1968: fig. 17). The evenly curved or C-shaped pregonite and the cercus that is straight over most of its length and curved in the distal fourth appear sufficiently different from both D. petra (pregonite with middle part straight; cercus bent rather than curved) and from D. salgada (pregonite with only distal part curved; cercus evenly curved) to reject conspecificity. Therefore, we consider D. petra and D. salgada as valid nominal species until future studies produce material from the type locality of D. malaisei (i.e., Barro Colorado, Panama), allowing a better resolution of this question. Dexosarcophaga petra and D. salgada can be separated by the following differences in the shape of the vesica in particular: broadest proximally (lateral view), with broad median fissure, without median knob-like projections and with an apical projection in lateral view (Fig. 7D) in D. petra, versus broadest distally, with narrow median fissure, a pair of median knoblike projections and without an apical projection in lateral view in D. salgada (De-Souza et al. 2021: fig. 3g –i).
description: Published as part of Santos, Josenilson Rodrigues dos, Pape, Thomas & Mello-Patiu, Cátia Antunes de, 2022, Eight new species of Dexosarcophaga Townsend, 1917 (Diptera, Sarcophagidae) from the Neotropical Region, pp. 109-137 in European Journal of Taxonomy 828 on pages 123-125, DOI: 10.5852/ejt.2022.828.1857, http://zenodo.org/record/6823730