Pseudonannolene imbirensis Fontanetti, 1996

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 : 42-43

Pseudonannolene imbirensis Fontanetti, 1996

Figs 72–73 , 165K , 169A , 177K , 183 ; Supp. file 4: Figs 209B, 216C

Pseudonannolene imbirensis Fontanetti, 1996: 430 , figs 8–10.

Pseudonannolene imbirensis – Iniesta & Ferreira 2013a: 92; 2013b: 366. — Karam-Gemael et al. 2018: figs 2–3. — Gallo & Bichuette 2019: 43; 2020: 36.

Pseudonannolene sp. “São Bernardo II cave” – Gallo & Bichuette 2017: 7, figs 4b, 5b, 9d.

Pseudonannolene sp. “ São Vicente II cave” – Gallo & Bichuette 2017: 7, figs 4c, 5c, 9e.

Pseudonannolene sp. “Terra Ronca cave” – Gallo & Bichuette 2017: 7, figs 4d, 5d, 9f.

Pseudonannolene aff. imbirensis – Bichuette et al. 2019: 24.

Diagnosis

Males of P. imbirensis resemble those of P. leopoldoi and P. microzoporus by having solenomere with ectal process deeply notched separating from apicomesal process ( Fig. 73D–F ), but differing by a head and trunk ocher ( Fig. 72 ); short prefemoral process on the first leg-pair ( Fig. 73A–B ).

Etymology

Although unspecified, the name is evidently an adjective referring to the locality where the type material was found, cave São Mateus-Imbira III.

Material examined

Holotype BRAZIL • ♂; Goiás, São Domingos, cave São Mateus-Imbira III; [-13.400307, -46.319377]; 700 m a.s.l.; Apr. 1989; Grupo Espeleológico de Geologia [ GREGEO] leg.; MZSP 1035 .

Paratypes (total: 3 ♀♀, 1 immature) BRAZIL • 2 ♀♀; same collection data as for holotype; Jul. 1988; MZSP 1030 • 1 ♀, 1 ♂ immature; same collection data as for holotype; MZSP .

Other material (total: 16 ♂♂, 22 ♀♀, 6 immatures)

BRAZIL – Goiás • 1 ♀, 1 ♀ immature; São Domingos, cave Passa Três ; [-13.612953, -46.368476]; 711 m a.s.l.; 27 Jul. 1988; MZSP • 1 ♂; 4 immatures; same collection data as for preceding; 25 Jul. 2000; M.E. Bichuette leg.; MNRJ • 3 ♂♂; same collection data as for preceding; 9 May 2001; MNRJ • 5 ♂♂, 3 ♀♀; cave São Vicente ; [-13.587311, -46.358229]; 626 m a.s.l.; 2–6 Mar. 2000; A. Chagas Jr. and M.E. Bichuette leg.; MZSP • 4 ♂♂, 1 ♀, 1 ♀ immature; same collection data as for preceding; 29 Jul. 2000; MNRJ • 1 ♀; same collection data as for preceding; MNRJ • 1 ♂, 3 ♀♀; same collection data as for preceding; 11 May 2001; A. Chagas Jr. and E. Trajano leg.; MNRJ • 1 ♂, 2 ♀♀; Parque Estadual Terra Ronca, cave São Vicente ; [-13.587311, -46.358229]; 626 m a.s.l.; 2–6 May 2000; A. Chagas Jr and M.E. Bichuette leg.; MZSP • 5 ♀♀; same collection data as for preceding; MZSP • 1 ♂, 2 ♀♀; cave Termas de São Vicente II; [-13.583333, -46.358229]; 617 m a.s.l.; 29 Jul. 2000; M.E. Bichuette and A. Chagas Jr. leg.; MNRJ 30155 • 1 ♀; cave Angélica ; [-13.522824, -46.382068]; 572 m a.s.l.; 1 Aug. 2000; A. Chagas Jr. leg.; MNRJ • 2 ♀♀; inside cave Angélica ; [-13.522824, -46.382068]; 572 m a.s.l.; 7 May 2001; A. Chagas Jr. leg.; MNRJ • 1 ♀; cave Bezerra ; [-13.547301, -46.376290]; 626 m a.s.l.; 30 Jul. 2000; A. Chagas Jr. leg.; MNRJ .

Descriptive notes

MEASUREMENTS. 61–63 body rings (1–2 apodous + telson). Males: body length 55–60 mm; maximum midbody diameter 2.4–2.5 mm. Females: body length 60–65 mm; maximum midbody diameter 2.8–3 mm.

COLOR. Body color faded, but apparently prozonites brownish, metazonites with a brown posterior band; head, collum, antennae, and legs lighter.

HEAD. Antennae short ( Fig. 72A ), 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. Ommatidial cluster well-developed, elliptical; ca 28 ommatidia in 5 rows.

BODY RINGS. Collum with lateral lobes rounded, with ca 8 striae, slightly curved ectad ( Fig. 72A ). Very faintly constricted between prozonite and metazonite; prozonites smooth; metazonites laterally with transverse striae slightly above ozopore in anterior body rings. Anterior sterna in midbody rings subrectangular, without transverse striae ( Fig. 169A ).

FIRST LEG-PAIR OF MALES. Coxae (cx) short (less than half of remaining podomere lengths), subtriangular, with the base arched, densely setose ( Fig. 73A ); prefemoral process (prf) short, less than half of prefemur, subcylindrical, densely setose up to its median region ( Fig. 73B ); 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, slightly flattened ( Fig. 73C ); prefemur compressed dorsoventrally; remaining podomeres setose.

GONOPODS. Gonocoxa (gcx) elongated, almost twice as long as telopodite, with the base arched; antero-posteriorly flattened ( Fig. 73D–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) short, rounded. Telopodite (tp) almost as wide as gcx ( Fig. 73D ); solenomere (sl) with apicomesal process (amp) slightly subtriangular; ectal process (ep) short, subtriangular, separating from amp by deep notch; sa located at mesal portion, slightly visible apically. Internal branch (ib) subtriangular, narrow, slightly curved ectad at midlength, surrounding the base of tp as a shield; with torsion of 180° in the distal portion and a rounded projection directed ectad; ib with setae along its entire margin not exceeding apically seminal region of sl ( Fig. 73D–F ).

VULVAE. As typical for the genus. Bursa subtriangular, glabrous ( Fig. 177K ); internal valve subtriangular, with mesal region rounded; operculum narrow, slightly curved ectad; external valve wide, subtriangular.

Distribution

Known only from caves in São Domingos, Goiás State, Brazil ( Fig. 183 ). Although no apparent restriction of P. imbirensis in caves may be assumed, all specimens either examined by us or recorded from the literature were collected inside caves or surrounding entrances.

Comments

Populations of P. imbirensis from the caves Angélica, São Bernardo II, and São Vicente II were regarded as troglobitic by Gallo & Bichuette (2017). On the other hand, in the same paper the authors regarded the population from cave Terra Ronca II as troglophilic. Excepting the pale brownish color of the species (see Fontanetti 1996), there is no morphological feature that clearly indicates troglomorphism in P. imbirensis , thus requiring further ecological studies and new extensive samplings to confirm its restriction to cave habitats.

Figures

Fig. 72. Pseudonannolene imbirensis Fontanetti, 1996, paratype, ♀ (MZSP 1030), in lateral view. A. Anterior region. B. Posterior region. Scale bars = 1 mm.

Fig. 73. Pseudonannolene imbirensis Fontanetti, 1996, holotype, ♂ (MZSP 1035). 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: A, E–F = 0.5 mm; B–D = 0.2 mm.

Fig. 165. Stereoscopic images of midbody legs of species of Pseudonannolene Silvestri, 1895. A. P. ambuatinga Iniesta & Ferreira, 2013. B. P. anapophysis Fontanetti, 1996. C. P. alata sp. nov. D. P. bovei Silvestri, 1895. E. P. buhrnheimi Schubart, 1960. F. P. caatinga Iniesta & Ferreira, 2014. G. P. callipyge Brölemann, 1902. H. P. curtipes Schubart, 1960. I. P. fontanettiae Iniesta & Ferreira, 2014. J. P. halophila Schubart, 1949. K. P. imbirensis Fontanetti, 1996. L. P. inops Brölemann, 1929. M, P. leopoldoi Iniesta & Ferreira, 2014. N. P. leucomelas Schubart, 1947. O. P. longicornis (Porat, 1888). P. P. lundi Iniesta & Ferreira, 2015. Q. P. magna Udulutsch & Pietrobon, 2003. R. P. maritima Schubart, 1949. Images not to scale.

Fig. 169. Stereoscopic images of gnathochilarium and anterior sternum of species of Pseudonannolene Silvestri, 1895. A. P. imbirensis Fontanetti, 1996. B. P. inops Brölemann, 1929. C. P. leopoldoi Iniesta & Ferreira, 2014. D. P. leucocephalus Schubart, 1944. E. P. longicornis (Porat, 1888). Images not to scale.

Fig. 177. Stereoscopic images of left vulva of species of Pseudonannolene Silvestri, 1895, in oral view. A. P. albiventris Schubart, 1952. B. P. alegrensis Silvestri, 1897. C. P. ambuatinga Iniesta & Ferreira, 2013. D. P. anapophysis Fontanetti, 1996. E. P. buhrnheimi Schubart, 1960. F. P. caatinga Iniesta & Ferreira, 2014. G. P. callipyge Brölemann, 1902. H. P. erikae Iniesta & Ferreira, 2014. I. P. fontanettiae Iniesta & Ferreira, 2014. J. P. halophila Schubart, 1949. K. P. imbirensis Fontanetti, 1996. L. P. inops Brölemann, 1929. M. P. leucocephalus Schubart, 1944. N. P. longicornis (Porat, 1888). O. P. lundi Iniesta & Ferreira, 2015. Images not to scale.

Fig. 183. Distribution map of the species Pseudonannolene halophila Schubart, 1949, P. imbirensis Fontanetti, 1996, P. inops Brölemann, 1929, P. leopoldoi Iniesta & Ferreira, 2014, and P. leucocephalus Schubart, 1944.