A reassessment of the Neotropical genus Pseudonannolene Silvestri, 1895: cladistic analysis, biogeography, and taxonomic review (Spirostreptida: Pseudonannolenidae) Author Iniesta, Luiz Felipe Moretti DEEF048E-97FB-4CCD-875F-5FA6184CA8AB&14A15A7F-730F-4D41-BDAC-D53514FAB85D Pós-graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil. & Laboratório de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. rodrigobouzan@outlook.com Author Bouzan, Rodrigo Salvador DEEF048E-97FB-4CCD-875F-5FA6184CA8AB&14A15A7F-730F-4D41-BDAC-D53514FAB85D Pós-graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil. & Laboratório de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. rodrigobouzan@outlook.com Author Brescovit, Antonio Domingos 14A15A7F-730F-4D41-BDAC-D53514FAB85D&D5B81D79-AFAE-47B1-8A6E-DAB448A24BCC Laboratório de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. rodrigobouzan@outlook.com&antonio.brescovit@butantan.gov.br text European Journal of Taxonomy 2023 2023-04-27 867 1 1 312 http://dx.doi.org/10.5852/ejt.2023.867.2109 journal article 57602 10.5852/ejt.2023.867.2109 1d2570da-e150-4d75-94d8-bfc5813062bc 2118-9773 7891021 8DEF295C-A8B1-4A6B-B873-B30949F64E07 Pseudonannolene curvata sp. nov. urn:lsid:zoobank.org:act: 789F5690-028D-4681-9025-41E7D902A7E6 Figs 151–152 , 175C , 179L , 190 Diagnosis Males of P. curvata sp. nov. resemble those of P. mesai , P. erikae , and P. bucculenta sp. nov. by having mesally curving telopodite ( Fig. 152D ). Pseudonannolene curvata differs from P.erikae and P. bucculenta by having the prefemoral process digitiform and larger than half of the prefemur ( Fig. 152B ), and from P. mesai by a narrow trunk of telopodite ( Fig. 152D–F ). Etymology The species epithet is derived from the Latin adjective ‘ curvatus ’ = ‘curved, bent’; in reference to the curved telopodites. Material examined Holotype BRAZIL • ♂ ; Rio Grande do Sul , Santana do Livramento , APA Cerrito ; [ -30.877251 , -55.538789 ]; 208 a.s.l.; 10 Dec. 2012 ; R. Ott leg.; MCN . Paratypes (total: 2 ♂♂, 2 ♀♀) BRAZIL • 2 ♂♂ ; same collection data as for holotype; MCN • 2 ♀♀ ; same collection data as for holotype; MCN . Referred non-type material (total: 13 ♂♂ , 8 ♀♀ ; 3 immatures ) BRAZIL – Rio Grande do Sul • 6 ♂♂ , 2 ♀♀ , 3 immatures ; Santana do Livramento , APA Cerrito ; [ -30.877251 , -55.538789 ]; 208 m a.s.l. ; 10 Dec. 2012 ; R. Ott leg.; MCN • 4 ♀♀ ; same collection data as for preceding; IBSP 7877 • 2 ♀♀ ; same collection data as for preceding; IBSP 7878 • 5 ♂♂ ; same collection data as for preceding; IBSP 7879 . URUGUAY – Salto • 1 ♂ ; Arapey River ; [ -31.147443 , -56.882060 ]; 98 m a.s.l. ; 20 Dec. 1954 ; FCE 433 . – Tacuarembó • 1 ♂ ; Laureles , Puntas de Arroio , Rincón de la Vasoura ; [ -31.362767 , -55.882940 ]; 147 m a.s.l. ; 20 Jan. 1960 ; FCE 343 . Description MEASUREMENTS . 51–56 body rings (1–2 apodous + telson). Males: body length 33.4–40.6 mm ; maximum midbody diameter 2.3–2.4 mm . Females: body length 45.4–49.9 mm ; maximum midbody diameter 3.1–3.5 mm . COLOR . Body color greenish grey; head and antennae darker, and collum little lighter; prozonites anteriorly greyish; metazonites with a medial band brown and a posterior whitish; legs brownish. HEAD . Antennae short ( Fig. 151A ), just reaching back to end of ring 5 when extended dorsally; relative antennomere lengths <2<3>4≈5≈6>7. Mandibular cardo with ventral margin swollen. Ommatidial cluster well-developed, elliptical; ca 25 ommatidia in 4 rows. BODY RINGS . Collum with lateral lobes rounded, with ca 6 striae ( Fig. 151A ). 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. 175C ). FIRST LEG-PAIR OF MALES . Coxae ( cx ) short (less than half of remaining podomere lengths), subtriangular, with the base arched and expanded, densely setose ( Fig. 152A ); prefemoral process ( prf ) as wide as half of prefemur, subcylindrical, densely setose along the entire ventral region ( Fig. 152B ); remaining podomeres with setae along the mesal region. SECOND LEG-PAIR OF MALES . Coxa ( cx ) as long as the sum of remaining podomere lengths, rounded; penis ( pn ) located at proximal region, rounded, slightly constricted basally ( Fig. 152C ); prefemur compressed dorsoventrally; remaining podomeres setose. GONOPODS . Gonocoxa ( gcx ) elongated, almost twice as long as telopodite, with the base slightly arched; antero-posteriorly flattened ( Fig. 152D–F ); with rows of papillae mesally. Seminal groove ( sg ) curved mesad; running mesally and terminating apically on the seminal apophysis ( sa ). Shoulder ( sh ) elongated, subtriangular. Telopodite ( tp ) almost as wide as gcx ( Fig. 152D ), strongly curved mesad; solenomere ( sl ) with apicomesal process ( amp ) rounded; ectal process absent; sa located at mesal portion, protruded apically. Internal branch ( ib ) shovel-shaped and rounded apically; setae restricted to the apical region of ib not exceeding seminal region of sl ( Fig. 152D–F ). VULVAE . As typical for the genus. Bursa subtriangular, glabrous ( Fig. 179L ); internal valve subtriangular; operculum narrow, curved ectad; external valve subtriangular. Distribution Known from the border of the Brazilian state of Rio Grande do Sul, northern Uruguay , and Argentina ( Fig. 190 ).