Pseudacteon pesqueroi, Pereira, Thalles Platiny Lavinscky, Delabie, Jacques Hubert Charles & Bravo, Freddy, 2015

Pereira, Thalles Platiny Lavinscky, Delabie, Jacques Hubert Charles & Bravo, Freddy, 2015, New species and records of Pseudacteon Coquillett, 1907 (Diptera, Phoridae), parasitoids of the fire ant Solenopsis geminata group (Hymenoptera, Formicidae), Zootaxa 4021 (4), pp. 585-590 : 587-588

publication ID

https://doi.org/ 10.11646/zootaxa.4021.4.8

publication LSID

lsid:zoobank.org:pub:9D1BCE6A-CF59-4BBC-A190-12C86277A9BD

DOI

https://doi.org/10.5281/zenodo.6097621

persistent identifier

https://treatment.plazi.org/id/03F787EC-B655-FFE9-62C9-ACFEFEA1FB38

treatment provided by

Plazi

scientific name

Pseudacteon pesqueroi
status

sp. nov.

Pseudacteon pesqueroi View in CoL new spec.

( Figures 1–7 View FIGURES 1 – 7 )

Diagnosis. Short bifurcated oviscape, with two plates, dorsal and ventral plate articulated anteriorly. Center of the dorsal plate with arcuate depression, concave, less sclerotized than the lateral lobes, with four pairs of setae. Lateral lobes rounded.

Material examined. Holotype. ♀ BRAZIL, Bahia: Ilhéus (CEPLAC– CEPEC, 14° 45'17.7" S, 39 ° 13'56.1" W), 03.X.2012, TPL Pereira leg. ( MZFS); 9 paratypes ♀: 3 female specimens, same locality and collector of holotype ( MZFS); 6 ♀ specimens, Ilhéus (Farm Mãe da Mata, 14 ° 49 '59.89”S, 39 ° 5' 54.28''W), 01.VI.2013, TPL Pereira leg. ( MZFS).

Additional material examined. BOLIVIA: Beni: 5km N Rurrenabaque (14.43º S, 67.51º W),1 ♀, 25.iv.2003, B. Brown, S. Marcotte leg., over Solenopsis electra ants (det. J.P Pitts) ants ( LACM). BOLIVIA: Beni: 5km N Rurrenabaque (14.43º S, 67.51º W,) 2 ♀, 25.iv.2003, B. Brown, S. Marcotte, E. Zumbado leg., Malaise trap ( LACM). PERU: Madre de Dios: (Cocha Cashu Biol. Stn., 11.92º S, 77.30º W), 1 ♀ on 29-30.viii.1986, 2♀ on 23-30.ix.1986, D.C. Darling leg, Malaise trap, ROM #863573, 868005 ( LACM).

Description. Female. Body length 1.3–1.4 mm (n=10). Head. Frons dark, one pair of supra–antennal setae proclinate, positioned in same horizontal line as first two setae, with 2–2–4–4 setae, also presence of micro setae on frons. Antenna flattened, flagellomere 1 conical with arista ( Fig. 1 View FIGURES 1 – 7 ). Palpus yellow with distinct apical setae and 2–4 shorter setae ( Fig. 4 View FIGURES 1 – 7 ). Thorax. Scutellum with four setae, posterior twice length of anterior. Wing. Length 0.8–1.2 mm, width 0.39–0.58 mm, costal vein 0.3–0.48 mm with presence 11–14 short setae of 0.02 mm (n=10), vein A1 + CuA2 present, but in some paratypes it is hyaline. Anterior basal region of wing with 3–4 setae ( Fig. 2 View FIGURES 1 – 7 ). Abdomen. First abdominal segment shorter than the others, tergite VI triangular ( Fig. 5 View FIGURES 1 – 7 ) with 10–12 bristles in posterior region. Sternite VI sclerotized ( Fig. 6 View FIGURES 1 – 7 ), convex, with 14–16 bristles, pleural VI with taint. Oviscape. Dark brown, ranging from 0.37– 0.48 mm long, lobe length outer margin 0,1–0,17 mm and opening between lobes, ranging from 0.04–0.06 mm (n=10). Short and bifurcated, with two plates, dorsal and ventral, articulated anteriorly, center of dorsal plate has a depression with four pairs of setae. ( Fig. 3 View FIGURES 1 – 7 ). In ventral plate is inserted the centerpiece (sternite VIII) lanceolate with four pairs of setae, at base of this piece there is an opening which passes the stylet (Fig. 3,7). Depression on dorsal plate is somewhat sclerotized and rounded in lateral lobes.

Male. Unknown.

Distribution. BOLIVIA: Beni; BRAZIL: Bahia; PERU: Madre de Dios.

Etymology. Named for Dr. Marcos Antônio Pesquero, one of the first Brazilian researchers to start studies with ecology and taxonomy of Pseudacteon .

Remarks. This species is included in the species group proposed by Plowes et al. (2009) with short, forked oviscape. Within the species group the new species resembles Pseudacteon nocens ( Borgmeier, 1926) and P. palomita ( Plowes et al. 2009) , but the depression in P. pesqueroi is less sclerotized than in P. nocens . Different also because, P. pesqueroi has lobes rounded, truncated in Pseudacteon nocens and facing out in P. palomita .

Field observations. The type specimens were collected associated with a colony of Solenopsis saevissima and Solenopsis geminata .

CEPEC

CEPEC, CEPLAC

LACM

Natural History Museum of Los Angeles County

ROM

Royal Ontario Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Phoridae

Genus

Pseudacteon

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