Pseudonannolene leucocephalus Schubart 1944
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 leucocephalus

description: 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.
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 46-48, DOI: 10.5852/ejt.2023.867.2109, http://zenodo.org/record/7891021