Pseudonannolene lundi Iniesta & Ferreira, 2015

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 : 51-53

Pseudonannolene lundi Iniesta & Ferreira, 2015

Figs 85–86, 165P, 170A, 177O, 184; Supp. file 4: Fig. 212B

Pseudonannolene lundi Iniesta & Ferreira, 2015: 124 , figs 1–3.

Pseudonannolene lundi – Deharveng & Bedos 2018: fig. 7.4d. — Gallo & Bichuette 2019: 42; 2020: 34.

Diagnosis

Resembling P. ambuatinga and P. spelaea by having head, trunk, and legs depigmented ( Fig. 85). Males of P. lundi differ from P. ambuatinga by square-shaped solenomere ( Fig. 86D), and from P. spelaea by having an evident seminal apophysis and a greater number of ommatidia (ca 25) ( Fig. 85A).

Etymology

Patronym honoring the Danish naturalist Peter Wilhelm Lund, who is considered the founder of speleology as a science in Brazil. The name also refers to the caving Brazilian group “Espeleo Grupo Peter Lund”, for their contributions to our knowledge of the caves of the region where the species occurs ( Iniesta & Ferreira 2015).

Material examined

Holotype

BRAZIL • ♂; Minas Gerais, Luislândia, Lapa Sem Fim cave ; [-16.233458, -44.585626]; 17 Apr. 2014; R. L. Ferreira, L.F.M. Iniesta, L. Rabello and M. Souza-Silva leg.; ISLA 8684.

Paratypes (total: 2 ♂♂, 3 ♀♀)

BRAZIL • 1 ♂; same collection data as for holotype; ISLA 8685 • 1 ♂; same collection data as for holotype; ISLA 8686 • 1 ♀; same collection data as for holotype; ISLA 8687 • 1 ♀; same collection data as for holotype; ISLA 8688 • 1 ♀; same collection data as for holotype; ISLA 8689 .

Descriptive notes

MEASUREMENTS. 62–68 body rings (1–2 apodous + telson). Males: body length 49.5 mm; maximum midbody diameter 2.7–2.8 mm. Females: body length 61.9 mm; maximum midbody diameter 2.8–3 mm.

COLOR. Living specimens depigmented. Color when stored in 70% ethanol: uniform pale brownish white, faint dark shadows posteriorly on prozonites; head, collum, antennae, and legs brownish.

HEAD. Antennae long ( Fig. 85A), just reaching back to end of ring 6 when extended dorsally; antennomeres elongated; relative antennomere lengths 1<2<3>4>5≈6>7. Mandibular cardo with ventral margin swollen. Ommatidial cluster well-developed, elliptical; ca 30 ommatidia in 5 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 10 striae, slightly curved ectad ( Fig. 85A). Very faint constriction between prozonites and metazonites; prozonites smooth; metazonites laterally with transverse striae below ozopore. Anterior sterna in midbody rings subrectangular, with shallow transverse striae ( Fig. 170A).

FIRST LEG-PAIR OF MALES. Coxae (cx) elongated (as long as the sum of remaining podomere lengths), subtriangular, with the base slightly arched and expanded, densely setose ( Fig. 86A); prefemoral process (prf) as wide as half of prefemur, subcylindrical, densely setose along its entire extension ( Fig. 86B); remaining podomeres with setae along the mesal region.

SECOND LEG-PAIR OF MALES. Coxa (cx) large and subrectangular; penis (pn) located at proximal region, large and rounded, not extended basally ( Fig. 86C); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) rounded, basally expanded and progressively less wide, with the base arched; flattened antero-posteriorly ( Figs 86D–F, 212B); 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. 86D); solenomere (sl) with apicomesal process (amp) short, rounded; ectal process (ep) rounded, separated from amp by shallow notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) shovel-shaped and rounded apically, with horizontal plate; setae restricted to the apical region of ib exceeding seminal region of sl ( Fig. 86D–F).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 177O); internal valve subtriangular, strongly inclined towards the mesal region; operculum narrow, constricted medially; external valve wide, subtriangular.

Distribution

A troglomorphic species known only from the type locality Lapa Sem Fim cave, Luislândia, state of Minas Gerais, Brazil ( Fig. 184). The Lapa Sem Fim cave corresponds to the largest cave in the Brazilian state, with at least 15 km of an intricate system of conduits and only two known entrances located in the extremities of the only intermittent drainage.