Pseudonannolene centralis 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 centralis

description: Pseudonannolene centralis Silvestri, 1902
Figs 62–63, 176D, 182
Pseudonannolene centralis Silvestri, 1902: 19.
Pseudonannolene centralis – Jeekel 2004: 88.
Diagnosis
Males of P. centralis resemble those of P. typica by having a solenomere with a short ectal process, separated from the apicomesal process by a shallow notch, and an internal branch with a distal projection (Fig. 63D). Pseudonannolene centralis differs from P. typica by an inconspicuous shoulder on the gonocoxa (Fig. 63C); a torsion of the internal branch short and starting apically (Fig. 63D); the head partially covered by scattered setae.
Etymology
Although unspecified in the original description, the species name probably refers to the central region in Paraguay where the species was found.
Material examined
Syntypes PARAGUAY • 1 ♂; Paraguarí; [-25.621436, -57.149997]; 12 Oct. 1900; A. Borelli leg.; USNM 2033 • 1 ♀ [examined by photographs]; same collection data as for preceding; ZMB 2884.
Descriptive notes
MEASUREMENTS. 62–66 body rings (1–2 apodous + telson). Males: body length ca 70 mm; maximum midbody diameter 5 mm.
COLOR. Body color greyish; collum darker; prozonites anteriorly greyish; metazonites with a medial brown band and a posterior lighter brown band; antennae and legs lighter brown.
HEAD. Antennae short (Fig. 62A), 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, elliptical; ca 30 ommatidia in 4 rows.
BODY RINGS. Collum with lateral lobes rounded, with ca 6 striae, slightly curved ectad (Fig. 62A). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae below ozopore. Anterior sterna in midbody rings subrectangular, without transverse striae (Fig. 176D).
FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base strongly arched and constricted medially, densely setose mainly on distal region (Fig. 63A); prefemoral process (prf) half as wide as prefemur, subcylindrical, densely setose up to its median region; 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. 63B); prefemur dorsoventrally compressed; remaining podomeres setose.
GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, with the base arched; flattened antero-posteriorly (Fig. 63C); 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 (Fig. 63D); solenomere (sl) with apicomesal process (amp) rounded; ectal process (ep) subtriangular, separated from amp by notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) subtriangular, narrow, surrounding base of tp as a shield; with torsion of 180° in the distal portion and a short, rounded projection, directed ectad; ib with setae along its entire margin exceeding apically seminal region of sl (Fig. 63C–D).
VULVAE. Not examined.
Distribution
Known only from the type locality Paraguarí, Paraguay (Fig. 182).
Comments
The species was not mentioned in the list of species described by Silvestri (see Viggiani 1973).
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 33-34, DOI: 10.5852/ejt.2023.867.2109, http://zenodo.org/record/7891021