Parasycorax sigmoidalis, Rossito & Pinho, 2019

Rossito, Lucas & Pinho, Luiz Carlos, 2019, A new species of Parasycorax and new records of Sycorax (Diptera: Psychodidae Sycoracinae) from southern Brazil, Zootaxa 4691 (1), pp. 89-92 : 89-91

publication ID

https://doi.org/ 10.11646/zootaxa.4691.1.9

publication LSID

lsid:zoobank.org:pub:5F6FEF87-E04A-4F76-9586-8DFF6733613D

DOI

https://doi.org/10.5281/zenodo.5929460

persistent identifier

https://treatment.plazi.org/id/03F187A9-FFD7-FF9F-4B87-EBE6FBB8FC0B

treatment provided by

Plazi

scientific name

Parasycorax sigmoidalis
status

sp. nov.

Parasycorax sigmoidalis View in CoL sp. nov.

( Figures 1–7 View FIGURES 1–7 )

Type material. Holotype male, slide-mounted. BRAZIL, Santa Catarina State, Santo Amaro da Imperatriz, Serra do Tabuleiro State Park , 27°44’47” S, 48°48’29” W, Malaise trap 13.II–02.VIII.2014, L.C. Pinho ( MZUSP) GoogleMaps . Paratype male, same data as holotype ( UFSC) GoogleMaps .

Diagnosis. The new species differs from all congeners by having a gonostylus with a single mesal branch that is sigmoidal in shape.

Description. Male (n=2). Total length 1.53–1.68 mm. Tegument uniformly brownish. Head: subcircular in frontal view; eyes separated; clypeus quadrangular; labrum triangular; scape cylindrical, larger than pedicel; pedicel spherical ( Fig. 3 View FIGURES 1–7 ). Flagellomeres XII and XIII missing from specimens; flagellomere I 1.22–1.28 times as long as fII; ascoids sinuous, about 2.0–2.2 times as long as flagellomeres on which they are inserted ( Fig. 2 View FIGURES 1–7 ). Palpus with four segments ( Fig. 4 View FIGURES 1–7 ). Lengths of palpus segments (in µm, n=1): 32, 42, 52, 92. Thorax: notum darker than the pleura, coxae and legs. Wing 1.59–1.66 mm long ( Fig. 1 View FIGURES 1–7 ) with rounded apex; Sc not reaching C; sc-r short (shorter than CuA); h absent; all veins not clearly touching C; Rs incomplete, not reaching R 1; base of Rs incomplete; base of R 4+5 incomplete, not reaching Rs; r-m not developed; m-cu lightly sclerotized. Cerci ( Fig. 5 View FIGURES 1–7 ) with some apical bristles. Hypoproct ending before the apex of the cercus, subtriangular with blunt apex, with apical micropilosity ( Fig. 5 View FIGURES 1–7 ). Gonocoxite 132–147 µm long, 83–93 µm wide; base of the gonocoxite having a lateral group of four sensorial setae, all shorter than remaining setae on gonocoxite ( Fig. 7 View FIGURES 1–7 ). Gonostylus ( Fig. 7 View FIGURES 1–7 ) 103–123 µm long, with one strongly sinuous, heavily sclerotized mesal branch, 132 µm long; outer branch with six spines, comprising a apical row of three spines, one strong apical, one strong subapical and one strong and long medial; base of the gonostylus with a group of four short sensorial setae inserted dorsally ( Fig. 7 View FIGURES 1–7 ). Aedeagus ( Fig. 6 View FIGURES 1–7 ) bifid, almost as long as ejaculatory apodeme. Ejaculatory apodeme almost as long as paramere. Paramere ( Fig. 6 View FIGURES 1–7 ) plate-like, without bristles.

Female. Unknown.

Etymology. The name sigmoidalis refers to the sigmoidal (S-shaped) mesal branch of the gonostylus.

Distribution. Currently known only from type locality.

Comments. The type locality, Serra do Tabuleiro State Park, Santo Amaro da Imperatriz, is located in the Atlantic Rain Forest Biome, Brazil. The specimens were collected in a Malaise trap set at ground level in a mature forest, 10 meters upstream from a high waterfall, near dead trees. Other species of Parasycorax have been collected in South America using CDC light traps suspended in the canopy, about 15 meters high ( Bejarano et al. 2008; Santos et al. 2009). Although the Malaise trap that collected P. sigmoidalis sp. nov. specimens was set on the ground, it is possible that canopy fauna were sampled due to its proximity to the canopy of large trees downstream of the waterfall.

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Psychodidae

Genus

Parasycorax

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