Pycnoscelus surinamensis ( Linnaeus, 1758 )

Anisyutkin, Leonid N., 2018, New data on the genus Pycnoscelus Scudder, 1862 with the description of P. schwendingeri sp. nov. (Blaberidae: Pycnoscelinae), Revue suisse de Zoologie 125 (1), pp. 79-86 : 80

Pycnoscelus surinamensis ( Linnaeus, 1758)

Figs 1-5

Material examined: ZIN, without accession number; 5 females of unknown provenance, reared in captivity in Saint Petersburg in 2017 .

Additions to description of female ( Figs 1-5 ): Based on specimens listed above, the description of Roth (1998) can be supplemented with the following details.

Somatic characters of female ( Figs 1-2 ): Abdomen without visible glandular specializations; spiraclebearing outgrowths of tergite VIII weakly expressed ( Fig. 1 ). Anal plate (tergite X) wider than long, its hind margin widely rounded and with a weak medial notch ( Fig. 1 ). Cerci short, flatten, with segments solidly connected but distinct ( Fig. 1 ). Genital plate wide, with a distinct pair of paramedian emarginations on hind margin ( Fig. 2 ). Paraprocts mostly membranous, bordered with a thin angulate sclerite on anterior and posterior side ( Fig. 3 , par.).

Ovipositor and adjacent structures ( Figs 3-5 ): Intercalary sclerite absent. Tergal processes of abdominal segment VIII wide and reduced, not reaching paratergites of tergite VIII, fused with basivalvula ( Fig. 3 , teVIII.); tergal processes of abdominal segment IX fully developed ( Fig. 3 , teIX.). Gonangulum distinct, well sclerotized ( Figs 3-5 , gg.). All valves of ovipositor mostly membranous, only partly sclerotized. First valves large, membranous at apex, with numerous setae along inner side ( Fig. 4 , v.I.). Base of 2nd and 3rd pairs of valves as in Fig. 5 , sclerotized lobes well developed ( Figs 4-5 , pl.). Anterior arch of second valvifer slightly angulate, as in Fig. 5 , a.a. Second valves of ovipositor small, completely hidden under 1st ones ( Fig. 4 , v.II.). Third valves of ovipositor (gonoplacs) wide ( Figs 3-4 , v.III.). Basivalvula developed as a pair of slightly asymmetrical, widely rounded and partly sclerotized plates ( Figs 3-5 , bsv.). Vestibular structure in shape of membranous pad ( Fig. 3 , vs.). Brood sac ( Fig. 3 ) without sclerotized structures.

Figures

Figs 1-5. Pycnoscelus surinamensis (Linnaeus, 1758), female. (1) Abdominal apex, dorsal view. (2) Genital plate, ventral view. (3) Ovipositor and adjacent structures, ventral view.(4) Ovipositor, ventral view.(5) Basal part of ovipositor, dorsal view. Dotted areas show membranous parts, except for valves of ovipositor in Figs 3-4. Abbreviations: aa., bsv., Cer., gg., par., pl., teVIII., teIX., v.I., v.II., v.III., vs. - see paragraph “abbreviation used in figures”; VIII, IX, X - abdominal tergites VIII-X; for details see text. Scale bars 1 mm: a: 1, b: 2, c: 3, d: 4-5.