Pseudonannolene longicornis
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 longicornis

description: Pseudonannolene longicornis (Porat, 1888)
Figs 83–84, 163K, 165O, 169E, 177N, 184
Alloporus longicornis Porat, 1888: 256.
Pseudonannolene marconii Iniesta & Ferreira, 2014: 371, figs 8, 14d. Syn. nov.
Pseudonannolene longicornis – Brölemann 1909: 57 (transference Alloporus longicornis Porat, 1888 in pars); 1919: 275. — Mauriès 1987: 170, figs 1–3 (neotype designation). — Jeekel 2004: 89. — Iniesta & Ferreira 2013a: 92; 2014: 361.
Pseudonannolene marconii – Gallo & Bichuette 2019: 47. Pseudonannolene? silvestris – Mauriès 1987: 180, figs 20–22 (misidentified males from Fazenda Cachoeira, Vassouras, Rio de Janeiro, Brazil).
Justification of synonymy
Through the examination of the type material of both species, as well as additional specimens from the type localities, we concluded that the male morphology of both nominal species agree completely when considering the gonopods and first and second leg-pairs. Slight differences in the forms of the gonocoxae and solenomere are treated as intraspecific variation. Therefore, P. marconii is proposed here as a junior synonym of P. longicornis.
Diagnosis
Males of P. longicornis resemble those of P. tricolor by having gonocoxa largely subcylindrical with large shoulder (Fig. 84D–F), but differing by an enlargement of the solenomere base, and a subtriangular internal branch that is not excavated at midlength, when viewed anally (Fig. 84D–E).
Etymology
Named after the Latin adjective ‘ longus ’ = ‘long’, and the noun ‘ cornus ’. Unspecified in the original description, but likely to be related to the frontal projection on the head of the species.
Material examined
Holotype
BRAZIL • ♂, holotype of P. marconii; Bahia, Pau Brasil, Pedra Suspensa cave; [-15.568625, -39.686560]; 180 m a.s.l.; 21 Jan. 2005; R.L. Ferreira et al. leg.; ISLA 4106.
Other material (total: 16 ♂♂, 2 ♀♀)
BRAZIL – Bahia • 1 ♂; Pau Brasil, Córrego Verde cave; [-15.466728, -39.674896]; 183 m a.s.l.; 21 Jan. 2005; R.L. Ferreira et al. leg.; ISLA 15678. – Espírito Santo • 5 ♂♂, 2 ♀♀; Aracruz, Parque Natural Municipal do Aricanga; [-19.830269, -40.328487]; 37 m a.s.l.; 22–27 Apr. 2010; IBSP 3734 • 1 ♂; REFMU do Morro do Aricanga; [-19.822498, -40.334524]; 122 m a.s.l.; 14–16 Oct. 2005; A. Giupponi, V. Orrico, M. Milleri, R. Rodrigues and T. Souza leg. MNRJ • 1 ♂; Linhares; [-19.395994, -40.065472]; 33 m a.s.l.; 23 Oct. 1944; O. Schubart leg.; MZSP • 6 ♂♂; Mata Alta; Apr. 1993; MNRJ 30155. – Rio de Janeiro • 1 ♂; Nova Iguaçu, Reserva Ecológica Tinguá; [-22.565598, -43.410073]; 392 m a.s.l.; Feb. 2002; E.F. Ramos leg.; IBSP 1921 • 1 ♂; Vassouras, Fazenda da Cachoeira; [-22.458059, -43.615817]; 680 m a.s.l.; 30 Apr. 1994; Boving-Petersen leg.; NHMD.
Descriptive notes
MEASUREMENTS. 54–60 body rings (1–2 apodous + telson). Males: body length 58–82 mm; maximum midbody diameter 4.7–5 mm. Females: body length 35–45 mm; maximum midbody diameter 5.3 mm.
COLOR. Body color brownish grey; head and collum darker; prozonites greyish anteriorly; metazonites with a light posterior band; antennae and legs lighter.
HEAD. Antennae long (Fig. 163K), 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 narrow. Ommatidial cluster well-developed, elliptical; ca 40 ommatidia in 5 rows. Frontal region with rounded projection.
BODY RINGS. Collum with lateral lobes rounded, with 10 striae, curved ectad (Fig. 83A). Very faint constriction between prozonites and metazonites; prozonites smooth; metazonites laterally with transverse striae slightly above ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, with shallow transverse striae (Fig. 169E).
FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base strongly arched and expanded, densely setose (Fig. 84A); prefemoral process (prf) twice as long as prefemur, subcylindrical, apically narrow and slightly curved ectad, densely setose up to its median region (Fig. 84B); 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. 84C); prefemur compressed dorsoventrally; remaining podomeres setose.
GONOPODS. Gonocoxa (gcx) elongated, largely subcylindrical, with the base arched; antero-posteriorly flattened (Fig. 84D–F); with rows of papillae mesally. Seminal groove (sg) curved; arising medially on mesal cavity and terminating apically on the seminal apophysis (sa). Shoulder (sh) large, rounded. Telopodite (tp) almost as wide as gcx (Fig. 84D); solenomere (sl) enlarged basally, with apicomesal process (amp) subtriangular, short; ectal process (ep) subtriangular, separating from amp by shallow notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) subtriangular, narrow and foliaceous; setae starting at midlength of ib slightly exceeding seminal region of sl (Fig. 84D–F).
VULVAE. As typical for the genus. Bursa subtriangular, glabrous (Fig. 177N); internal valve subtriangular, with mesal region rounded; operculum narrow, curved ectad; external valve wide, subtriangular.
Distribution
The species is distributed in the coastal region of the Atlantic Forest from Rio de Janeiro up to the southern Bahia State, Brazil (Fig. 184).
Comments
The descriptive notes are based on topotypes of the species, since the examination of the neotype deposited at the Muséum national d’histoire naturelle, Paris, France (MNHN), was not possible during this study.
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 50-51, DOI: 10.5852/ejt.2023.867.2109, http://zenodo.org/record/7891021