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 scalaris Brölemann, 1902 Figs 119–120 , 187 ; Supp. file 4: Fig. 223A Pseudonannolene scalaris Brölemann, 1902a: 133 , pl. vi–vii figs 148–153. Pseudonannolene scalaris – Brölemann 1904 : pl. ii fig. 3. — Jeekel 2004: 90 . Diagnosis Males of P. scalaris differ from those of all other species of the genus by having internal branch contiguous to gonocoxa, without a notch separating both structures ( Fig. 119B–D ); internal branch longer than half of gonocoxa; seminal apophysis located medially ( Fig. 119D ). Etymology Although unspecified, the name is probably related to the Latin ‘ scalaris ’ = ‘pertaining to’ or ‘resembling a flight of stairs’ or ‘of a ladder’. Material examined Holotype ARGENTINA • ♂ [head and first leg-pair missing]; Buenos Aires , Buenos Aires; [ -34.638212 , -58.470722 ]; 25 m a.s.l. ; R. von Ihering leg.; MZSP 232 . Other material (total: 1 ♂ , 1 immature ) ARGENTINA – Buenos Aires • 1 ♂ [on microscope slide]; Buenos Aires , Tandil ; [ -34.638212 , -58.470722 ]; 25 m a.s.l. ; Aug. 1952 ; MZSP • 1 ♂ immature [on microscope slide]; Balcarce ; [ -37.846741 , -58.255617 ]; 123 m a.s.l. ; Aug. 1952 ; MZSP . Descriptive notes Anterior region of holotype missing, descriptive notes of anterior body rings, first and second leg-pairs of males adapted from Brölemann (1902a: 133) and from topotype to supplement original description. MEASUREMENTS . 61 body rings (2 apodous + telson). Males: body length ca 50 mm (without head); maximum midbody diameter 2.6 mm . COLOR . Body color faded, but apparently prozonites brownish, metazonites with a posterior band brown; legs lighter brown. BODY RINGS . Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae below ozopore in posterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae. FIRST LEG-PAIR OF MALES . Coxae ( cx ) short (less than half of remaining podomere lengths), subtriangular, with the base arched, densely setose mainly on distal region ( Fig. 120D ); prefemoral process ( prf ) as wide as half of prefemur, subcylindrical; 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. 120C ); prefemur compressed dorsoventrally; remaining podomeres setose. GONOPODS . Gonocoxa ( gcx ) as long as the telopodite, square-shaped and abruptly constricted towards apical region, with the base slightly arched ( Fig. 119B–D ); scattered rows of papillae mesally. Seminal groove ( sg ) arising medially on mesal cavity, curved ectad at midlength of tp and terminating apically on the seminal apophysis ( sa ). Shoulder absent. Telopodite ( tp ) elongated ( Figs 119D , 120E–F ); solenomere ( sl ) with small squamous region; apicomesal process ( amp ) subtriangular, mesal; ectal process absent; sa located at medial portion, visible apically. Internal branch ( ib ) elongated and positioned parallel to the tp ; contiguous to gcx , without a notch separating both structures; long setae restricted to the apical region of ib exceeding seminal region of sl ( Figs 119D , 120F ). Distribution Known only from Buenos Aires , Argentina ( Fig. 187 ).