Pseudonannolene bucculenta, 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 : 102-103

Pseudonannolene bucculenta sp. nov.

urn:lsid:zoobank.org:act:5CFFCC61-1C8A-4DE7-BF92-46C53D80A6FC

Figs 149–150 , 164C , 174B , 179F , 190 ; Supp. file 4: Fig. 197E

Diagnosis

Males of P. bucculenta sp. nov. resemble those of P. erikae , P. mesai , and P. curvata sp. nov. by having a mesally curving telopodite ( Fig. 150D ), but differing clearly by a narrow and elongated prefemoral process of the first leg-pair ( Fig. 150B ) and by the presence of paired projections in the proximal region of the mentum on the gnathochilarium ( Figs 174B , 197E).

Etymology

The species epithet is derived from the Latin adjective ‘ bucculentus ’ = ‘having fat cheek’; referring to the thickened projections on the mentum.

Material examined

Holotype BRAZIL • ♂; Minas Gerais, Nova Lima, RPPN Samuel de Paula ; [-20.001055, -43.871088]; 975 m a.s.l.; Oct. 2006; J.P.P. Pena-Barbosa leg.; IBSP 3352 .

Paratypes (total: 3 ♂♂, 1 ♀) BRAZIL • 3 ♂♂; same collection data as for holotype; IBSP 3358 • 1 ♀; same collection data as for holotype; IBSP 3396 .

Referred non-type material (total: 57 ♂♂, 40 ♀♀; 19 immatures)

BRAZIL – Minas Gerais • 1 ♂; Belo Horizonte, Campus Pampulha , UFMG; [-19.868399, -43.959965]; 830 m a.s.l.; 6 Jan. 2006; L. Bernardi leg.; IBSP 2905 • 1 ♂, 2 ♀♀; same collection data as for holotype; IBSP 3350 • 2 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3359 • 1 ♂; same collection data as for holotype; IBSP 3361 • 3 ♂♂, 2 ♀♀, 2 ♂♂ immatures, 1 ♀ immature; same collection data as for holotype; IBSP 3344 • 3 ♂♂, 3 ♀♀, 3 ♂♂ immatures, 5 immatures; same collection data as for holotype; IBSP 3348 • 1 ♂; same collection data as for holotype; IBSP 3353 • 8 ♂♂, 3 ♀♀; same collection data as for holotype; IBSP 3410 • 1 ♂, 2 ♀♀, 2 immatures; same collection data as for holotype; IBSP 3407 • 1 ♂, 2 immatures; same collection data as for holotype; IBSP 3403 • 2 ♂♂, 3 ♀♀, 1 ♂ immature; same collection data as for holotype; IBSP 3415 • 3 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3426 • 3 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3426 • 1 ♂, 1 ♀; same collection data as for holotype; IBSP 3408 • 2 ♂♂; same collection data as for holotype; IBSP 3406 • 3 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3413 • 5 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3416 • 2 ♂♂, 4 ♀♀; same collection data as for holotype; IBSP 3412 • 2 ♂♂, 1 immature; same collection data as for holotype; IBSP 3321 • 6 ♂♂, 1 ♀; same collection data as for holotype; IBSP 3417 • 1 ♂, 1 ♀; same collection data as for holotype; IBSP 3404 • 2 ♀♀; same collection data as for holotype; IBSP 3411 • 1 ♂, 1 ♀; same collection data as for holotype; IBSP 3424 • 1 ♂ immature, 1 ♀ immature; same collection data as for holotype; IBSP 3420 • 1 ♂, 2 ♀♀; same collection data as for holotype; IBSP 3402 • 1 ♂, 1 ♀; same collection data as for holotype; IBSP 3422 • 2 ♂♂, 2 ♀♀; same collection data as for holotype; IBSP 3423 .

Description

MEASUREMENTS. 51–53 body rings (1–2 apodous + telson). Males: body length 40.2–45.5 mm; maximum midbody diameter 2.2–2.59 mm. Females: body length 38.2–40.2 mm; maximum midbody diameter 2.4–2.6 mm.

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

HEAD. Antennae short ( Fig. 164C ), 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. Mentum of gnathochilarium with thickened basal projections ( Figs 174B , 197E). Ommatidial cluster well-developed, elliptical; ca 25 ommatidia in 4 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 9 shallow striae ( Fig. 149A ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae above ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 174B ).

FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base strongly arched, densely setose ( Fig. 150A ); prefemoral process (prf) narrow and as longer as prefemur, subcylindrical, densely setose up to its median region ( Fig. 150B ); 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. 150C ); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) elongated, but less than twice telopodite, with the base arched; antero-posteriorly flattened ( Fig. 150D–F ); with rows of papillae mesally. Seminal groove (sg) curved mesad; running mesally and terminating apically on the seminal apophysis (sa). Shoulder (sh) short, slightly subtriangular. Telopodite (tp) almost as wide as gcx ( Fig. 150D ), strongly curved mesad; solenomere (sl) with apicomesal process (amp) subtriangular; ectal process absent; sa located at mesal portion, not protruded apically. Internal branch (ib) narrow, foliaceus; with basal constriction in relation to gcx; ib with setae along its entire margin slightly exceeding apically seminal region of sl ( Fig. 150D–F ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 179F ); internal valve subtriangular, with mesal region clearly rounded; operculum narrow, rounded apically; external valve wide, subtriangular.

Distribution

Known only from forests in the central region of Minas Gerais State, Brazil ( Fig. 190 ).

Figures

Fig. 149. Pseudonannolene bucculenta sp. nov., ♀ (IBSP 3350), in lateral view. A. Anterior region. B. Posterior region. Scale bars = 0.2 mm.

Fig. 150. Pseudonannolene bucculenta sp. nov., ♂ (IBSP 3350). A. First leg-pair. B. Detail of prefemur. C. Second leg-pair. D. Detail of telopodites, in anal view. E. Gonopods, in anal view. F. Gonopods, in oral view. Abbreviations: see Material and methods. Scale bars = 0.2 mm.

Fig. 164. Stereoscopic images of antennae of species of Pseudonannolene Silvestri, 1895. A. P. morettii sp. nov. B. P. nicolau sp. nov. C. P. bucculenta sp. nov. D. P. occidentalis Schubart, 1958. E. P. parvula Silvestri, 1902. F. P. patagonica Brölemann, 1902. G. P. paulista Brölemann, 1902. H. P. robsoni Iniesta & Ferreira, 2014. I. P. rolamossa Iniesta & Ferreira, 2013. J. P. silvestris Schubart, 1944. K. P. strinatii Mauriès, 1974. L. P. tricolor Brölemann, 1902. M. P. typica Silvestri, 1895. N. P. insularis sp. nov. O. P. urbica Schubart, 1945. Images not to scale.

Fig. 174. Stereoscopic images of gnathochilarium and anterior sternum of species of Pseudonannolene Silvestri, 1895. A. P. xavieri Iniesta & Ferreira, 2014. B. P. bucculenta sp. nov. C. P. morettii sp. nov. D. P. insularis sp. nov. E. P. nicolau sp. nov. Images not to scale.

Fig. 179. Stereoscopic images of left vulva of species of Pseudonannolene Silvestri, 1895, in oral view. A. P. strinatii Mauriès, 1974. B. P. tocaiensis Fontanetti, 1996. C. P. tricolor Brölemann, 1902. D. P. typica Silvestri, 1895. E. P. xavieri Iniesta & Ferreira, 2014. F. P. bucculenta sp. nov. G. P. morettii sp. nov. H. P. insularis sp. nov. I. P. nicolau sp. nov. J. P. granulata sp. nov. K. P. alata sp. nov. L. P. curvata sp. nov. M. P. aurea sp. nov. Images not to scale.

Fig. 190. Distribution map of the speciesPseudonannolene alata sp. nov.,P. aureasp. nov., P. bucculenta sp. nov., P. curvata sp. nov., and P. granulata sp. nov.