Pycnostigmus rostratus Cameron

Pycnostigmus rostratus Cameron

(Figs 1–2)

Pycnostigmus rostratus Cameron 1905: 20 –21. Type species by monotypy.

Redescription. Holotype FEMALE. Head. Shagreened and substantially setose (frons, occiput, cheeks) (Figs 1 E & 2E). Antenna entirely dark brown/black, scape 1.75x length of radicle, short appressed setae on all 16 flagellomeres, moniliform.

Mesosoma. Lateral surface of pronotum densely rugulose and pitted; evenly covered in moderately long setae (Figs 1 B & 2B). Mesopleuron striate except for small area immediately ventrad of mesopleural triangle, and an additional portion immediately dorsal of mesocoxa; dorsal and ventral margins of mesopleural triangle clearly visible, center of triangle setose (Figs 1 B & 2B). Mesoscutum weakly pitted with small punctures and sparsely setose; cuticle between punctures shiny; notaulices complete, originating at anterior end of parascutal impression; posterior convergence point of notaulices with a small subquadrate, shiny portion of the mesoscutum indented (Figs 1 C & 2C). Disk of scutellum strongly rugose and deeply pitted, setose along posterior margin; sides not marked by a distinct carina, curving ventrally (Figs 1 C & 2C); scutellar ridge that separates scutellar fovea often extending to small spine along posterior margin of scutellum.

Metapleural-propodeal complex. Entire metapleuron covered in long, thin setae (Figs 1 B & 2B). Propodeum sparsely covered by long setae; cuticle deeply rugulose across entire propodeum. Nucha extended posteriorly, deeply striate (Figs 1 A, 2A, 1C & 2C).

Metasoma. Petiole about as long as deep, deeply striate. Syntergum (T2+T3) shiny and smooth; posterior portion of T-3-4 with a brush of setae (Figs 1 A & 2A). Entire metasoma, in lateral view, about as long as deep.

Wings. Pseudostigma weakly pigmented, marginal cell visible (Figs 1 D & 2D).

Legs. Femora and tibiae black; long setae present. Tarsomeres brown, covered in short, appressed setae (Figs 1 A & 2A).

MALE. As in female except: 18 antennal flagellomeres present; length of metasoma 1.67x depth.

Diagnosis. Separated from P. mastersonae by the head and mesosoma being non-metallic; from P. fossilensis by having the disk of the scutellum completely rugose (center smooth in P. fossilensis); from P. incognito by having the mesopleuron mostly striate (almost entirely smooth in P. incognito); from P. hoerikwaggonensis by having the lateral aspect of the pronotum areolate (striate in P. hoerikwaggonensis).

Distribution. South Africa: Western Cape (Fig. 13).

Material examined. Holotype: [first label] Cape T, 9/87 [Cape Town, September, 1887], [second label] SAM-HYM-P002866, [third label, in Cameron’s handwriting] Pycnostigmus rostratus Cam. Type Cape Town (see inset Fig. 1 A for labels). The type is a female, in good condition (c.f. Fig. 1), having been remounted on a card by M. Sporrong (Sweden). Deposited in SAMC.

Additional material. Paratype: SOUTH AFRICA. [first label] Type (NHML type label with red ring), [second label] B.M. Type Hym. 7. 1., [third label, in Cameron’s handwriting] Pycnostigmus rostratus Cam. Type Cape Town, [fourth label] Cameron Coll. 1906–138. The type is in moderate condition, with the head plus mesosoma together and mounted separately from the metasoma. Deposited in NHML. Western Cape Province. Koeberg Nature Reserve, 33°37.622'S 18°24.259'E, 8 Aug–5 Sept 1997, S van Noort, Malaise trap KO97-M07, West Coast Strandveld, (1 female) [SAMC]; Koeberg Nature Reserve, 33°37.622'S 18°24.259'E, 8 Aug–5 Sept 1997, S van Noort, Malaise trap KO97-M08, West Coast Strandveld, SAM-HYM-P024713 (1 female) [SAMC]; West Coast Fossil Park (5.5 km 290o W Langebaanweg) 32o57.402’S 18o05.438’E, 4-11 Sept 2002, S van Noort, Malaise trap, LW02-R5-M12, rehabilitated mine dump, SAM-HYM-P024398 (determined by F. Ronquist, 2005) (1 female) [SAMC]; Jacobsbaai, N of Saldanha Bay, 32o58’S 17o54’E, P.T. O., HG Robertson, West Coast Strandveld ex pitfall trap, SAM-HYM-P024396 (1 female); West Coast Fossil Park, (3 km 270° W Langebaanweg), 32°58.445'S 18°07.236'E, 18–25 Sept 2002, S van Noort, Malaise trap LW02-N3-M39, Sand Plain Fynbos (4 female, 2 male) [SAMC]; Anyskop Farm, (5.5 km 290° W Langebaanweg) 32°57.394'S 18°05.324'E, 16–23 Oct 2002, S van Noort, Malaise trap LW02-N7-M115, Sand Plain Fynbos (1 female, 1 male) [USNM], West Coast Fossil Park, (3 km 270° W Langebaanweg) 32°58.445'S 18°07.236'E, 18–25 Sept 2002, S van Noort, Malaise trap LW02-N3-M39, Sand Plain Fynbos (1 male) [SAMC]; Anyskop Farm, (5.5 km 290° W Langebaanweg) 32°57.301'S 18°05.283'E, 18–25 Sept 2002, S van Noort, Malaise trap LW02-N8-M48, Sand Plain Fynbos (2 females) [SAMC]; Langberg Farm, (3 km 280° W Langebaanweg) 32°58.045'S 18°07.418'E, 18–25 Sept 2002, S van Noort, Malaise trap LW02-N1-M35, Sand Plain Fynbos (1 male, 1 female) [CASC]; Anyskop Farm, (5.5 km 290° W Langebaanweg) 32°57.394'S 18°05.324'E, 25.ix–2.x 2002, S van Noort, Malaise trap LW02-N7-M64, Sand Plain Fynbos SAM-HYM- P0024414 (4 females, 2 males) [SAMC]; Anyskop Farm, (5.5 km 290° W Langebaanweg) 32°57.394'S 18°05.324'E, 9–16 Oct 2002, S van Noort, Malaise trap LW02-N7-M98, Sand Plain Fynbos (2 females) [SAMC]; De Hoop Nature Reserve, 34°27'S 20°25'E 11.X.1994, coastal fynbos, sweepnet, leg. Michael Söderlund (1 male) [ULMZ].

Image deposition. A MorphBank collection of images of P. rostratus can be accessed via http://morphbank.net/Show/?id= 110332.