Pseudonannolene aurea, Iniesta & Bouzan & Brescovit, 2023

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 : 100-101

publication ID 10.5852/ejt.2023.867.2109

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scientific name

Pseudonannolene aurea

sp. nov.

Pseudonannolene aurea View in CoL sp. nov.

Figs 147–148 View Fig View Fig , 175D View Fig , 179M View Fig , 190 View Fig


Males of P. aurea sp. nov. slightly resemble those of P. paulista by having a solenomere with a spiniform ectal process deeply notched separating from apicomesal process ( Fig. 148D View Fig ), but differing by an internal branch subtriangular with distal projection ( Fig. 148D–F View Fig ).


The species epithet is derived from the Latin adjective ‘ aurum ’ = ‘golden’; in reference to the type locality Dianópolis, which is historically known for the gold mining activities in the region.

Material examined

Holotype BRAZIL • ♂; Tocantins, Dianópolis, Mojadores cave ; [-11.624226, -46.820593]; 672 m a.s.l.; 4–9 Dec. 2017; F. Pellegatti leg.; IBSP 5858 View Materials . GoogleMaps

Paratypes (total: 1 ♂, 3 ♀♀) BRAZIL – Tocantins • 1 ♂, 2 ♀♀; Dianópolis, Areia cave ; [-11.624226, -46.820593]; 670 m a.s.l.; 21–29 May 2008; F. Pellegatti leg.; IBSP 5854 View Materials GoogleMaps 1 ♀; same collection data as for holotype; 4–12 Mar. 2008; IBSP 5856 View Materials GoogleMaps .

Referred non-type material (total: 3 ♂♂, 7 ♀♀; 16 immatures)

BRAZIL – Tocantins • 2 ♀♀, 4 immatures; Dianópolis, Vozinha cave ; [-11.624226, -46.820593]; 672 m a.s.l.; 21–29 May 2008; F. Pellegatti leg.; IBSP 5859 View Materials GoogleMaps 3 ♂♂, 2 ♀♀, 7 immatures; Onça cave ; 4–12 Mar. 2008; F. Pellegatti leg.; IBSP 5840 View Materials 5 immatures; same locality data as for preceding; 4–9 Dec. 2007; F. Pellegatti leg.; IBSP 5843 View Materials 1 ♀; Coluna cave ; 21–29 May 2008; F. Pellegatti leg.; IBSP 5836 View Materials 2 ♀♀; Vertebra cave ; 21–29 May 2009; F. Pellegatti leg.; IBSP 5837 View Materials .


MEASUREMENTS. 58–63 body rings (1–2 apodous + telson). Males: body length 63.1 mm; maximum midbody diameter 3.6–3.8 mm. Females: body length 61.4–67.8 mm; maximum midbody diameter 3.7–4.1 mm.

COLOR. Body color brownish red; head, antennae, collum, and legs brownish; prozonites anteriorly greyish; metazonites with a medial band brown and a posterior lighter.

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, elliptical; ca 35 ommatidia in 5 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 10 striae, slightly curved ectad ( Fig. 147A View Fig ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae slightly above ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 175D View Fig ).

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. 148A View Fig ); prefemoral process (prf) as long as prefemur, subcylindrical, densely setose up to its median region ( Fig. 148B View Fig ); 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. 148C View Fig ); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, with the base arched; antero-posteriorly flattened ( Fig. 148D–F View Fig ); with rows of papillae mesally. Seminal groove (sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis (sa). Shoulder (sh) subtriangular. Telopodite (tp) almost as wide as gcx, with deep depression separating from sh ( Fig. 148D View Fig ); solenomere (sl) with apicomesal process (amp) subtriangular; ectal process (ep) spiniform, elongated, separating from amp by deep notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) subtriangular, narrow, surrounding basally tp as a shield; with torsion of 180° in the distal portion and projection directed diagonally upwards; ib with setae along its entire margin exceeding apically seminal region of sl ( Fig. 148D–F View Fig ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 179M View Fig ); internal valve subtriangular, slightly rounded mesally; operculum narrow, curved ectad; external valve subtriangular.


Known only from caves and surrounding forests in Dianópolis, Tocantins State, Brazil ( Fig. 190 View Fig ).

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