Atlantodesmus pintoi ( Schubart, 1946 )

Bouzan, Rodrigo Salvador, Pena-Barbosa, João Paulo P. & Brescovit, Antonio Domingos, 2017, Taxonomic review of the genus Atlantodesmus Hoffman, 2000 (Polydesmida: Chelodesmidae), Zootaxa 4236 (2), pp. 269-290 : 283-286

Atlantodesmus pintoi ( Schubart, 1946)

Figures 5 ĀC, 13–15, 19

Leptodesmus pintoi Schubart, 1946: 166 , fig. 2 (Male holotype from Ilhéus (39°04’63’’W, 14°79’35’’S), Bahia, Brazil, 1919, E. Garbe leg., deposited in MZSP 412 , examined).

Leptodesmus pintoi: Schubart, 1956: 421 .

Atlantodesmus pintoi: Hoffman, 2000: 106 .

Additional material examined. BRAZIL. BAHIA: Ilhéus (39°04’63’’W, 14°79’35’’S), 5♀, 1919, E. Garbe col. ( MZSP 929 , MZSP 930 , MZSP 931 , MZSP 932 ) . Reserva Biológica de Una (39°02’98’’W, 15°19’54’’S), 22♂ 16♀, XI/2001, A.D. Brescovit col. ( IBSP 991 , IBSP 992 , IBSP 1001 , IBSP 1003 , IBSP 995 ) ; 1♂ 2♀, 13–16/IV/ 1998, A.D. Brescovit et al. col. (IBSP 581, IBSP 584). Ribeirão do Engano (39°04’63’’W, 14°79’35’’S), 1♂, 1945, G. Pereira col. ( MNRJ 11954 ) . Jussari , Reserva Natural da Serra de Teimoso (39°49’41’’W, 15°18’80’’S), 1♀, 08– 10/IV/1998, A.D. Brescovit et al. col. ( IBSP 600 ) . Itabuna (39°27’84’’W, 14°78’80’’S), 1♂, 1919, E. Garbe col. ( MZSP 927 ) .

Diagnosis. Males of Atlantodesmus pintoi differ from all other species of the genus by the acropodite process with a large, rounded spoon-shaped tip ( Figs 13 A–B, 14A–B).

Redescription. Male (Holotype, MZSP 412). Coloration (in alcohol): Head reddish brown. Body brown with a median dorsal white band. Paranota tip white. Legs reddish. Telson white. Total length: 57. Collum 2.09 long, 7.11 wide. Antennomere lengths (1>7): 0.91; 2.40; 2.28; 2.20; 2.20; 1.78; 0.29. Gonopod opening: 1.21 long, 1.78 wide. Telson 1.95. Gonopods: coxae with two bristles in the distal dorsal side. Without coxal apophysis. Prefemoral region ventrally positioned. Prefemoral process long, with narrow stalk about half of total PfP length; apex expanded, calyx-shaped, edge of calyx slightly serrated ( Fig. 13 A). The dorsal side of the prefemoral region with several folds ( Fig. 14 D). Transition from prefemoral region to acropodite discontinuous. Small incision at the external margin of the telopodite is visible in mesal view. Reduced cingulum visible in ectal view ( Fig. 14 C, arrow). Solenomere long and falciform. Acropodite process with a rounded lobe above the base of the solenomere ( Fig. 13 A, arrow), acropodite process terminating in a large flat rounded apex ( Figs 13 A–B).

Female (Paratype, MZSP 929). Coloration (in alcohol) and body as in male. Total length 50. Collum 2.03 long, 6.80 wide. Telson 1.83. Cyphopods ( Figs 15 B–D) with numerous dispersed fine bristles on both valves. The apical part of cyphopod is slightly projected, the intermediate membrane projects between the valves ( Fig. 15 B).

Variation: The body of some specimens can show a whitish yellow coloration, however the median band is present, but weakly developed. In some individuals the apex of the prefemoral process lacks serration.

Distribution. State of Bahia, Brazil, in areas containing the Brazilian Atlantic forest biome ( Por et al. 2005).

Figures

FIGURE 5. Dorsal views of anterior (A, D), midbody (B, E) and posterior (C, F) segments of Atlantodesmus pintoi (A – C) and A. teresa (D – F).

FIGURE 13. Atlantodesmus pintoi (Holotype, MZSP 412), left gonopod. A, mesal view; B, ectal view. Scale bar = 1 mm. A, acropodite process; Cg, cingulum; PfP, prefemoral process; S, solenomere. Arrow refers to lobe present above the base of the solenomere.

FIGURE 14. Atlantodesmus pintoi. A, left gonopod in mesal view; B, left gonopod in ectal view; C, detail of the reduced cingulum; D, folds in prefemoral region of the gonopod; E, Aperture of gonopod; F, detail of folds in the posterior margin of the aperture of gonopod. A, acropodite process; Cg, cingulum; PfP, prefemoral process; S, solenomere. Arrow refers to cingulum.

FIGURE 15. Atlantodesmus pintoi. A, lateral projection on the seventh segment; B, cyphopods in lateral view; C, detail of the left cyphopod in lateroventral view; D, detail of the right cyphopod in lateroventral view.