Pseudonannolene occidentalis Schubart, 1958

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 : 63-65

Pseudonannolene occidentalis Schubart, 1958

Figs 19B , 98–100 , 164D , 171A , 178E , 185 ; Supp. file 4: Figs 194B, 199D, 208C, 212A, 216E, 222E

Pseudonannolene occidentalis Schubart, 1958: 214 , figs 12–13.

Pseudoannolene [sic!] occidentalis – Krabbe 1982: 71.

Pseudonannolene occidentalis – Jeekel 2004: 89. — Golovatch et al. 2005: 279.

Diagnosis

Males of P. occidentalis differ from all congeners by having the frontal region of the head densely setose, overlapping the supralabral and labral setae ( Fig. 19B ); mandibular cardo finely granular, with swollen ventral margin ( Figs 171A , 199D); solenomere with seminal apophysis located ectally ( Fig. 99D ).

Etymology

Adjective referring to the geographical distribution of the species in western Brazil ( Schubart 1958).

Material examined

Holotype BRAZIL • ♂ [gonopods, first and second leg-pair on microscope slides]; Mato Grosso do Sul, Salobra ; [-20.187516, -56.547016]; 112 m a.s.l.; 22 Jan. 1955; L. Travassos leg.; MZSP.

Paratypes (total: 2 ♀♀) BRAZIL • 2 ♀♀; same collection data as for holotype; MZSP .

Other material (total: 9 ♂♂, 7 ♀♀, 4 immatures)

BRAZIL – Mato Grosso • 2 ♂♂; Chapada dos Guimarães, close to Aldeia Velha ; [-15.464565, -55.760228]; 823 m a.s.l.; 6 Mar. 2014; A. Chagas-Jr and M. Karam-Gemael leg.; CZUFMT 808 • 2 ♂♂, 1 ♀, 4 immatures; Chapada Aventura ; [-15.464283, -55.759722]; 820 m a.s.l.; 7 Nov. 2015; A. Chagas-Jr et al. leg.; CZUFMT 818 • 1 ♂, 4 ♀♀; same locality data as for preceding; 28 Aug. 2014; A. Chagas-Jr leg.; CZUFMT 823 . – Mato Grosso do Sul • 1 ♂; Salobra ; [-20.189192, -56.547513]; 112 m a.s.l.; 19 Jan. 1941; F. Lane leg.; MZSP . – São Paulo • 3 ♂♂, 1 ♀; Jundiaí, Serra do Japi ; [-23.226630, -46.924751]; 871 m a.s.l.; 6–10 Aug. 2001; Equipe Biota leg.; IBSP 1998 • 1 ♀; Jundiaí, Reserva Natural Municipal da Serra do Japi ; [-23.236337, -46.943607]; 1069 m a.s.l.; Mar. 2007; A.D. Brescovit leg.; IBSP 3100 .

Descriptive notes

MEASUREMENTS. 70–73 body rings (2 apodous + telson). Males: body length 70–80 mm; maximum midbody diameter 4.4–5 mm. Females: body length 70 mm; maximum midbody diameter 4.8 mm.

COLOR. Body color brownish yellow; head, collum, and antennae darker; prozonites and metazonites anteriorly darker, with a posterior band reddish; legs brownish.

HEAD. Antennae short ( Fig. 164D ), just reaching back to end of ring 5 when extended dorsally; relative antennomere lengths 1≈2≈3>4=5=6>7. Frontal setae overlapping supralabral and labral ones ( Fig. 19B ). Mandibular cardo with ventral margin swollen ( Figs 171A , 199D). Ommatidial cluster well-developed, elliptical; ca 25 ommatidia in 4 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 7 striae, slightly curved ectad ( Fig. 98A ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae up to ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 171A ).

FIRST LEG-PAIR OF MALES. Coxae (cx) elongated (as long as the sum of remaining podomere lengths), subrectangular, with the base arched, densely setose ( Figs 99A , 100B ); prefemoral process (prf) elongated and as wide as half of prefemur, subcylindrical, densely setose along the entire ventral region ( Fig. 99B ); remaining podomeres with setae along the mesal region.

SECOND LEG-PAIR OF MALES. Coxa (cx) large and subrectangular; penis (pn) located at proximal region, rounded, not extended basally ( Figs 99C , 100E–F , 208C); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) subtriangular, basally expanded and progressively less wide, with the base slightly arched; antero-posteriorly strongly flattened, longitudinal thickened ridge with rows of papillae mesally ( Figs 99D–F , 100C–D ). Seminal groove (sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis (sa). Shoulder absent. Telopodite (tp) arising from gcx by short, compressed trunk ( Figs 99D , 100D ); solenomere (sl) with apicomesal process (amp) short; ectal process (ep) short, subtriangular, separating from amp by shallow notch; sa located at ectal portion, elongated and thickened apically. Internal branch (ib) shovel-shaped and rounded apically, with horizontal plate; setae restricted to the apical region of ib exceeding seminal region of sl ( Figs 99D–F , 100C–D ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 178E ); internal valve subtriangular; operculum large, slightly expanded apically; external valve wide, subtriangular.

Distribution

Known from the west region of São Paulo up to the states of Mato Grosso do Sul and Mato Grosso, Brazil ( Fig. 185 ); the distribution range of P. occidentalis partially covers the biomes Atlantic Forest, Cerrado, and Pantanal.

Figures

Fig. 19. SEM and microscope images. A. Head of Pseudonannolene robsoni Iniesta & Ferreira, 2014 (IBSP 3526), in frontal view. B. Head of P. occidentalis Schubart, 1958 (IBSP 1998), in frontal view. C. Collum of P. robsoni (IBSP 3506), in lateral view. D. Head of P. robsoni (IBSP 3526), in lateral view. E. Gnathochilarium of P. microzoporus Mauriès, 1987 (IBSP 3497). F. Detail of gnathochilarium of P. microzoporus (IBSP 3497). Scale bars: A–B = 500 µm; C, F, = 200 µm; D = 1 mm; E = 100 µm.

Fig. 98. Pseudonannolene occidentalis Schubart, 1958, ♂ (IBSP 1998), in lateral view. A. Anterior region. B. Posterior region. Scale bars = 1 mm.

Fig. 99. Pseudonannolene occidentalis Schubart, 1958, ♂ (IBSP 1998). A. First leg-pair. B. Detail of prefemur. C. Second leg-pair. D. Detail of telopodites, in anal view. E. Gonopods, in anal view. F. Gonopods, in oral view. Abbreviations: see Material and methods. Scale bars: A, C, E–F = 0.5 mm; B, D = 0.2 mm.

Fig. 100. Pseudonannolene occidentalis Schubart, 1958, holotype, ♂ (MZSP). A. Original label of type material mounted on microscope slide. B. First leg-pair. C. Gonopods, in oral view. D. Detail of telopodites, in oral view. E. Second leg-pair. F. Detail of penis. Abbreviations: see Material and methods. Images not to scale.

Fig. 164. Stereoscopic images of antennae of species of Pseudonannolene Silvestri, 1895. A. P. morettii sp. nov. B. P. nicolau sp. nov. C. P. bucculenta sp. nov. D. P. occidentalis Schubart, 1958. E. P. parvula Silvestri, 1902. F. P. patagonica Brölemann, 1902. G. P. paulista Brölemann, 1902. H. P. robsoni Iniesta & Ferreira, 2014. I. P. rolamossa Iniesta & Ferreira, 2013. J. P. silvestris Schubart, 1944. K. P. strinatii Mauriès, 1974. L. P. tricolor Brölemann, 1902. M. P. typica Silvestri, 1895. N. P. insularis sp. nov. O. P. urbica Schubart, 1945. Images not to scale.

Fig. 171. Stereoscopic images of gnathochilarium and anterior sternum of species of Pseudonannolene Silvestri, 1895. A. P. occidentalis Schubart, 1958. B. P. ophiiulus Schubart, 1944. C. P. parvula Silvestri, 1902. D. P. paulista Brölemann, 1902. E. P. robsoni Iniesta & Ferreira, 2014. Images not to scale.

Fig. 178. Stereoscopic images of left vulva of species of Pseudonannolene Silvestri, 1895, in oral view. A. P. magna Udulutsch & Pietrobon, 2003. B. P. maritima Schubart, 1949. C. P. mesai Fontanetti, 2000. D. P. microzoporus Mauriès, 1987. E. P. occidentalis Schubart, 1958. F. P. ophiiulus Schubart, 1944. G. P. parvula Silvestri, 1902. H. P. pusilla Silvestri, 1895. I. P. paulista Brölemann, 1902. J. P. robsoni Iniesta & Ferreira, 2014. K. P. rolamossa Iniesta & Ferreira, 2013. L. P. sebastianus Brölemann, 1902. M. P. segmentata Silvestri, 1895. N. P. silvestris Schubart, 1944. O. P. spelaea Iniesta & Ferreira, 2013. Images not to scale.

Fig. 185. Distribution map of the species Pseudonannolene meridionalis Silvestri, 1902, P. mesai Fontanetti, 2000, P. microzoporus Mauriès, 1987, P. occidentalis Schubart, 1958, and P. ophiiulus Schubart, 1944.