Pseudonannolene leucocephalus Schubart, 1944

Iniesta, Luiz Felipe Moretti, Bouzan, Rodrigo Salvador & Brescovit, Antonio Domingos, 2023, A reassessment of the Neotropical genus Pseudonannolene Silvestri, 1895: cladistic analysis, biogeography, and taxonomic review (Spirostreptida: Pseudonannolenidae), European Journal of Taxonomy 867 (1), pp. 1-312 : 46-48

Pseudonannolene leucocephalus Schubart, 1944

Figs 78–80 , 169D , 177M , 183 ; Supp. file 4: Fig. 204B

Pseudonannolene leucocephalus Schubart, 1944: 413 , figs 75–76.

Pseudonannolene leucocephalus – Schubart 1952: 418. — Iniesta & Ferreira 2013b: 366. — Gallo & Bichuette 2019: 47; 2020: 36.

Pseudonannolene leucocephala – Jeekel 2004: 89.

Diagnosis

Males of P. leucocephalus slightly resemble those of P. halophila by having the solenomere subtriangular ( Figs 79D , 80D ), but differing by having short coxae on the first leg-pair with a constriction at about midlength ( Figs 79A , 80B ); the prefemoral process wide ( Fig. 79B ); internal branch with a horizontal plate ( Fig. 79D ).

Etymology

Name ‘leucocephalus’ (feminine ‘leucocephala’) taken from the Greek words ‘ lefkó ’ = ‘white’, plus ‘ kephalos ’ = ‘head’, referring to the whitish coloration of the head and antennae of the species ( Schubart 1944).

Material examined

Holotype BRAZIL • ♂ [gonopods, gnathochilarium, first and second leg-pair on microscope slides]; São Paulo, Mogi Guaçu, Cachoeira de Cima ; [-22.223841, -47.049620]; 610 m a.s.l.; 12 Oct. 1941; J. Gaspar and O. Schubart leg.; MZSP 1101 .

Paratypes (total: 4 ♂♂, 5 ♀♀, 3 immatures) BRAZIL • 4 ♂♂, 5 ♀♀, 3 immatures; same collection data as for holotype; MZSP .

Other material (total: 14 ♂♂, 22 ♀♀, 14 immatures)

BRAZIL – São Paulo • 1 ♀; Mogi Mirim, Usina Mogi-Guaçu ; [-22.432213, -46.950871]; 623 m a.s.l.; 12 Oct. 1941; J. Gaspar leg.; MZSP 1054 • 2 ♂♂, 1 ♀; same collection data as for preceding; MZSP 1060 • 4 ♂♂, 1 ♀; same collection data as for preceding; MZSP ; • 1 ♂; Descalvado, Escaramuça ; [-21.916757, -47.620295]; 685 m a.s.l; 4 Mar. 1941; O. Schubart leg.; MZSP • 1 ♂; same locality data as for preceding; 4 Mar. 1941; MZSP • 2 ♂♂, 9 ♀♀, 2 ♂♂ immatures, 8 ♀♀ immatures, 1 immature; same locality data as for preceding; 6 Jan. 1940; MZSP • 1 ♀; São José do Rio Preto, Fazenda Itália ; [-20.816500, -49.376402]; 506 m a.s.l.; 25 Oct. 1945; F.P. Mello leg.; MZSP • 1 ♂, 2 immatures; Cachoeira de Cima, Rio Mogi Guaçu ; [-21.087289, -48.180398]; 498 m a.s.l.; 15 Jan. 1947; O. Schubart leg.; MZSP • 2 ♂♂, 7 ♀♀, 1 ♀ immature; Leme, Fazenda Graminha ; [-22.183853, -47.384995]; 624 m a.s.l.; 10 Dec. 1948; O. Schubart leg.; MZSP • 2 ♂♂, 2 ♀♀; Porto Ferreira, Mata do Procópio ; [-21.842360, -47.471538]; 565 m a.s.l.; 7 Mar. 1944; N. dos Santos leg. MZSP .

Descriptive notes

MEASUREMENTS. 58–63 body rings (2–3 apodous + telson). Males: body length 25–35 mm; maximum midbody diameter 1.4–1.8 mm. Females: body length 28–38 mm; maximum midbody diameter 1.6– 2.1 mm.

COLOR. Body color faded, but apparently prozonites brownish, metazonites with a brown posterior band; head, antennae, and legs lighter; collum brown.

HEAD. Antennae short, just reaching back to end of ring 5 when extended dorsally; relative antennomere lengths 1<2≈3>4≈5<6>7. Mandibular cardo with ventral margin narrow. Ommatidial cluster well-developed, covered partially by anterior region of collum, elliptical; ca 20 ommatidia in 4 rows.

BODY RINGS. Collum with lateral lobes broadly subrectangular, with ca 6 striae ( Fig. 78A ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae from ca ⅓ length below ozopore. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 169D ).

FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base arched, slightly expanded, and constricted medially, densely setose ( Figs 79A , 80B , 204B); prefemoral process (prf) as long as half length of prefemur, subcylindrical, densely setose along the entire ventral region, central groove deep ( Fig. 79B ); remaining podomeres with setae along the mesal region.

SECOND LEG-PAIR OF MALES. Coxa (cx) subrectangular; penis (pn) located at proximal region, rounded, not extended basally ( Fig. 79C ); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, with the base arched; slightly flattened antero-posteriorly ( Figs 79D–F , 80C ); with rows of papillae mesally. Seminal groove (sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis (sa). Shoulder (sh) inconspicuous. Telopodite (tp) almost as wide as gcx ( Figs 79D , 80D ), with rounded laterad projection; solenomere (sl) with apicomesal process (amp) short, subtriangular; ectal process absent; sa located at medial portion, slightly visible apically. Internal branch (ib) shovel-shaped, apically enfolding sl, with horizontal plate; setae restricted to the apical region of ib exceeding seminal region of sl ( Figs 79D–F , 80D ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 177M ); internal valve subtriangular, with its sides having the same length; operculum large, curved ectad; external valve narrow, in oral view, subtriangular.

Distribution

Known from the central-west region of São Paulo State, Brazil ( Fig. 183 ); occurring in the Cerrado biome (tropical savanna ecoregion) and in second-growth forests in the region.

Figures

Fig. 78. Pseudonannolene leucocephalus Schubart, 1944, ♂ (MZSP 1060), in lateral view. A. Anterior region. B. Posterior region. Scale bars = 0.5 mm.

Fig. 79. Pseudonannolene leucocephalus Schubart, 1944, ♂ (MZSP 1060). A. First leg-pair. B. Detail of prefemur. C. Second leg-pair. D. Detail of telopodite, in anal view. E. Left gonopod, in anal view. F. Left gonopod, in oral view. Abbreviations: see Material and methods. Scale bars = 0.2 mm.

Fig. 80. Pseudonannolene leucocephalus Schubart, 1944, ♂ (MZSP). A. Sexual structures and gnathochilarium of type material mounted on microscope slide. B. First leg-pair. C. Gonopods, in oral view. D. Detail of telopodites, in oral view. E–F. Original labels of type material. Abbreviations: see Material and methods. Images not to scale.

Fig. 169. Stereoscopic images of gnathochilarium and anterior sternum of species of Pseudonannolene Silvestri, 1895. A. P. imbirensis Fontanetti, 1996. B. P. inops Brölemann, 1929. C. P. leopoldoi Iniesta & Ferreira, 2014. D. P. leucocephalus Schubart, 1944. E. P. longicornis (Porat, 1888). Images not to scale.

Fig. 177. Stereoscopic images of left vulva of species of Pseudonannolene Silvestri, 1895, in oral view. A. P. albiventris Schubart, 1952. B. P. alegrensis Silvestri, 1897. C. P. ambuatinga Iniesta & Ferreira, 2013. D. P. anapophysis Fontanetti, 1996. E. P. buhrnheimi Schubart, 1960. F. P. caatinga Iniesta & Ferreira, 2014. G. P. callipyge Brölemann, 1902. H. P. erikae Iniesta & Ferreira, 2014. I. P. fontanettiae Iniesta & Ferreira, 2014. J. P. halophila Schubart, 1949. K. P. imbirensis Fontanetti, 1996. L. P. inops Brölemann, 1929. M. P. leucocephalus Schubart, 1944. N. P. longicornis (Porat, 1888). O. P. lundi Iniesta & Ferreira, 2015. Images not to scale.

Fig. 183. Distribution map of the species Pseudonannolene halophila Schubart, 1949, P. imbirensis Fontanetti, 1996, P. inops Brölemann, 1929, P. leopoldoi Iniesta & Ferreira, 2014, and P. leucocephalus Schubart, 1944.