Pseudonannolene borelli Silvestri 1895
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 borelli

description: Pseudonannolene borelli Silvestri, 1895
Figs 50, 180
Pseudonannolene borelli Silvestri, 1895b: 7, fig. 12.
Pseudonannolene borelli – Silvestri 1897b: 8; 1902: 22 (description of specimens from Areguá, Central, Paraguay). — Viggiani 1973: 366. — Jeekel 2004: 88.
Diagnosis
Males of P. borelli slightly resemble those of P. longicornis and P. tricolor by having gonopod with subcylindrical gonocoxa, but differing by an internal branch with long setae restricted to the apical margin and the solenomere with a large trunk (Silvestri 1895b: 7, fig. 12; Fig. 50E).
Etymology
Patronym honoring the collector Dr Alfredo Borelli (Silvestri 1895b).
Material examined (total: 1 ♀)
PARAGUAY – Central • 1 ♀; Areguá; [-25.303669, -57.412255]; 157 m a.s.l.; 11 Oct. 1900; A. Borelli leg.; USNM 2389.
Descriptive notes
Gonopod description adapted from Silvestri (1895b: 7) to supplement original description and to introduce gonopod terminology. Non-sexual characters described as female.
MEASUREMENTS. 68 body rings (1 apodous + telson). Females: body length ca 60 mm; maximum midbody diameter 3 mm.
COLOR. Strongly faded because of long preservation in ethanol, but apparently metazonites with a brownish posterior band; head, antennae, and legs lighter brownish.
HEAD. Antennae short (Fig. 50A), 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 32 ommatidia in 5 rows.
BODY RINGS. Collum broken. Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae. Anterior sterna in midbody rings subrectangular, without transverse striae.
GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, subrectangular; flattened antero-posteriorly; with rows of papillae mesally. Seminal groove (sg) terminating apically on the seminal apophysis (sa). Shoulder (sh) inconspicuous. Telopodite (tp) as wide as half of gcx; solenomere (sl) with apicomesal process (amp) subtriangular; ectal process (ep) subtriangular, separated from amp by shallow notch; sa located at mesal portion. Internal branch (ib) shovel-shaped, slightly curved apically; setae restricted to the apical region of ib exceeding seminal region of sl (Fig. 50E).
Distribution
Known from Chaco in southwestern Paraguay; other records from the literature for Argentina and Bolivia (Fig. 180).
Comments
The type material described by Silvestri (1895b) was not found after consulting the Museo Regionale Scienze Naturali, Torino, Italy (MRSN). Nevertheless, a female topotype (USNM 2389) originally identified by Silvestri (but erroneously referenced as a paratype in its original label) was examined (Fig. 50A–D). Other specimens from Argentina (Santa Fé), Bolivia (Potosí and Tajira), and Paraguay (Asunción) were recorded by Silvestri (1897b, 1902).
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 25-26, DOI: 10.5852/ejt.2023.867.2109, http://zenodo.org/record/7891021