Pseudonannolene parvula Silvestri 1902
Creators: name: Iniesta, Luiz Felipe Moretti
name: Bouzan, Rodrigo Salvador
name: Brescovit, Antonio Domingos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Spirostreptida
Pseudonannolenidae
Pseudonannolene
Pseudonannolene parvula

description: Pseudonannolene parvula Silvestri, 1902
Figs 103– 105, 164E, 166D, 171C, 178G, 186
Pseudonannolene parvula Silvestri, 1902: 24.
Pseudonannolene parvula – Brölemann 1909: 85. — Viggiani 1973: 367. — Jeekel 2004: 90. — Iniesta & Ferreira 2013a: 92; 2013c: 79.
Diagnosis
Males of P. parvula slightly resemble those of P. spelaea by having the solenomere rounded apically and with seminal apophysis located mesally (Fig. 104D–F), but differing by the absence of a squamous membrane on the seminal apophysis (Fig. 104D); and by the presence of spiniform setae in the proximal region of the mentum and stipes (Fig. 171C).
Etymology
Named after the Latin adjective ‘ parvus ’ = ‘few’, ‘small’, plus the suffix ‘-ulus’ (feminine ‘-ula’). Unspecified in the original description.
Material examined
Syntypes PARAGUAY • 2 ♀♀; Alto Paraná, Bella Vista; [-25.528108, -54.583762]; 8 Jul. 1900; A. Borelli leg.; USNM 2020 • 1 ♂ [fragmented], 2 ♀♀ [examined by photographs]; same collection data as for preceding; ZMB 2888.
Other material (total: 6 ♂♂, 18 ♀♀, 11 immatures)
BRAZIL – Paraná • 1 ♀; Foz do Iguaçu, Parque Nacional do Iguaçu; [-25.500435, -54.583352]; 195 m a.s.l.; 3–12 Mar. 2002; Equipe Biota leg.; IBSP 1488 • 1 ♀; same collection data as for preceding; IBSP 1504 • 1 ♀ immature; same collection data as for preceding; IBSP 1463 • 2 ♀♀; same collection data as for preceding; IBSP 1437 • 1 ♀; same collection data as for preceding; IBSP 1451 • 2 ♀♀; same collection data as for preceding; IBSP 1462 • 1 ♀; same collection data as for preceding; IBSP 1443 • 1 ♀; same collection data as for preceding; IBSP 1482 • 1 ♂; same collection data as for preceding; IBSP 1474 • 1 ♂, 1 ♀; same collection data as for preceding; IBSP 1486 • 1 ♀; same collection data as for preceding; IBSP 1962 • 1 ♀; same collection data as for preceding; IBSP 1967 • 1 ♀; same collection data as for preceding; IBSP 1961 • 1 ♀; same collection data as for preceding; IBSP 1954 • 1 ♀; same collection data as for preceding; IBSP 1952 • 1 ♀; same collection data as for preceding; IBSP 1956 • 1 ♀ immature; same collection data as for preceding; IBSP 1963 • 1 ♀ immature; same collection data as for preceding; IBSP 1960 • 1 ♀ immature; same collection data as for preceding; IBSP 1958 • 1 ♀ immature; same collection data as for preceding; IBSP 1955 • 1 ♀ immature; same collection data as for preceding; IBSP 1957 • 1 ♀ immature; same collection data as for preceding; IBSP 1959 • 1 ♀ immature; same collection data as for preceding; IBSP 1966 • 1 ♀; same collection data as for preceding; IBSP 1953 • 2 ♂♂, 1 ♀; same locality data as for preceding; 28–31 Jul. 2016; V. Calvanese leg.; IBSP 7629 • 2 ♂♂; same collection data as for preceding; IBSP 7630 • 3 immatures; same collection data as for preceding; IBSP 7628.
Descriptive notes
MEASUREMENTS. 58–61 body rings (1–2 apodous + telson). Males: body length 51.9–55.4 mm; maximum midbody diameter 3.4–4.9 mm. Females: body length 56–57.9 mm; maximum midbody diameter 4–4.1 mm.
COLOR. Body color brownish grey; collum darker; prozonites anteriorly greyish; metazonites with a medial brown band and a posterior lighter one; head, antennae, and legs lighter brown.
HEAD. Antennae short (Fig. 164E), 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. Mentum and stipes of gnathochilarium with scattered spiniform setae (Fig. 171C). Ommatidial cluster well-developed, elliptical; ca 30 ommatidia in 5 rows.
BODY RINGS. Collum with lateral lobes rounded, with ca 6 shallow striae, slightly curved ectad (Fig. 103A). 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. 171C).
FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base arched and strongly expanded, densely setose (Fig. 104A); prefemoral process (prf) as wide as half of prefemur, subcylindrical, curved ectad, densely setose up to its median region (Fig. 104B); remaining podomeres with setae along the mesal region.
SECOND LEG-PAIR OF MALES. Coxa (cx) large and rounded; penis (pn) located at proximal region, rounded, not extended basally (Fig. 104C); prefemur compressed dorsoventrally; remaining podomeres setose.
GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, with the base slightly arched; antero-posteriorly flattened (Fig. 104D–F); with rows of papillae mesally. Seminal groove (sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis (sa). Shoulder absent. Telopodite (tp) almost as wide as gcx (Fig. 104D); solenomere (sl) with apicomesal process (amp) rounded; ectal process (ep) short, nearly not distinguished from amp by inconspicuous notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) subtriangular, narrow, surrounding basally tp as a shield; setae starting at midlength of ib exceeding seminal region of sl (Fig. 104D–F).
VULVAE. As typical for the genus. Bursa subtriangular, glabrous (Fig. 178G); internal valve subtriangular, with mesal region rounded; operculum narrow, curved ectad; external valve wide, subtriangular.
Distribution
Known from the region of Iguaçu Falls and surrounding forests on the border of the Argentine province of Misiones, Paraguayan department of Alto Paraná, and the Brazilian state of Paraná (Fig. 186).
Comments
Male syntypes from Alto dell’Iguazú and Puerto Bertoni described by Silvestri (1902) were not found. Nevertheless, syntypes from Bella Vista (Fig. 105C) and topotypes from Foz do Iguaçu were examined (Fig. 105D).
description: Published as part of 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), pp. 1-312 in European Journal of Taxonomy 867 (1) on pages 67-68, DOI: 10.5852/ejt.2023.867.2109, http://zenodo.org/record/7891021