Atlantodesmus eimeri ( Attems, 1898 )

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 : 275-279

Atlantodesmus eimeri ( Attems, 1898)

Figures 4 ĀC, 6–8, 19

Leptodesmus (Odontopeltis) eimeri Attems, 1898: 67 , 400, fig. 151 (Four syntypes from Blumenau (49°07’17’’W, 26°91’65’’S), Santa Catarina, Brazil, 5/II/1889, L. Hettsckko leg., deposited in NHMW, not examined).

Pseudoleptodesmus (Brachyurodesmus) eimeri: Attems, 1931: 34 , figs 50–53.

Leptodesmus (Leptodesmus) verhoeffi Attems, 1931: 17 , figs 18–21. (Male holotype from Santa Catarina, Brazil; W. Erhardt leg., deposited in ZMH, not examined). Attems, 1938: 21, fig. 19; Schubart, 1954: 99 (syn.).

Leptodesmus (Brachyurodesmus) eimeri: Attems, 1938: 47 , figs 53–54.

Leptodesmus eimeri: Schubart, 1946: 192 ; 1954: 99, fig. 19.

Leptodesmus verhoeffi: Schubart, 1946: 196 .

Atlantodesmus eimeri: Hoffman, 2000: 101 –113, fig. 3–7, 12.

Note. The original description and figures by Attems (1898), as well the descriptions by Schubart (1954), are highly detailed, making the examination of the type material unnecessary. Also, specimens of A. eimeri were easily identified among collections, due to its distinct gonopod and unusual tubercles in the dorsal surface of the metazonites, thereby allowing a more comprehensive analysis.

Additional material examined. BRAZIL. PARANÁ: Piraquara (49°06’28’’W, 25°44’26’’S), Mananciais da Terra , 1♂, 02/XI/2002, A. Chagas-Jr col. ( MNRJ 11963 ) ; Morretes, Pico do Marumbi (48°82’90’’W, 25°48’27’’S), 1♀, XI/1945, O. Curial col. ( MZSP 934 ) . SANTA CATARINA: Blumenau, Parque Estadual Ribeirão do Garcia (49°05’95’’W, 26°93’30’’S), 7♂, 24/I/2003, C.A. Rheims col. ( IBSP 2191 , IBSP 2202 , IBSP 2208 , IBSP 2211 , IBSP 1828 ) ; Blumenau , Nova Rússia (49°07’17’’W, 26°91’65’’S), 3♂ 1♀, 20/II/2013, R.P. Indicatti & B. Gambaré col. ( IBSP 4367 ) ; Paulo Lopes , Parque Estadual da Serra do Tabuleiro (48°80’35’’W, 27°92’22’’S), 19♂ 15♀, 10– 20/I/2003, Equipe Biota col. ( IBSP 2936 , IBSP 2337 , IBSP 2326 , IBSP 2303 , IBSP 2317 , IBSP 2296 , IBSP 2332 , IBSP 2348 , IBSP 2315 , IBSP 2318 , IBSP 2344 , IBSP 2345 , IBSP 2343 , IBSP 2334 , IBSP 2346 , IBSP 2340 , IBSP 2338 , IBSP 3126 , IBSP 3123 , IBSP 3124 , IBSP 2353 ) ; Corupá (49°24’52’’W, 26°43’55’’S), RPPN Emilio Batistella , 9♂ 5♀, 05–06/XII/2011, P.G.B.S. Dias col. ( IBSP 3864 , IBSP 3865 , IBSP 3866-3867 , IBSP 3868 , IBSP 2869 , IBSP 3869 , IBSP 3870 , IBSP 3871 , IBSP 3873 , IBSP 3874 , IBSP 3875 ) ; Florianópolis, ( Praia do Santinho , 48°38’26’’W, 27°47’08’’S, Morro das Aranhas), 1♂, 29/X/2008, Pedroso & Vasconcelos col. ( MNRJ 11945 ) ; Poção (48°50’69’’W, 27°61’05’’S), 1♂ 1♀, 10–15/II/2002, D.R. Pedroso col. ( MNRJ 11952 ) ; ( Praia de Canasvieiras , 48°45’82’’W, 27°43’22’’S), 1♂, IV/1945, L. Gofferjé col. ( MZSP 933 ) ; Porto Belo, (48°54’04’’W, 27°15’42’’S), APA Araçá , 1♂ 1♀, 25/IV/ 2011, Trívia, A.L. & A. Chagas-Jr col. ( IBSP 3713 ) ; Brusque (48°91’11’’W, 27°09’82’’S), 12♂ 4♀, 1949, H.P. Veloso col. ( MZSP 2976 , MZSP 3175 , MZSP 3215 , MZSP 2979 , MZSP 3231 , MZSP 3283 , MZSP 2908 , MZSP 5684 , MZSP 5585 , MZSP 3384 , MZSP 20788 , MZSP 3180 , MZSP 3164 , MZSP 2403 , MZSP 3366 , MZSP 4064 ) ; Rio dos Cedros (49°27’43’’W, 26°74’35’’S), 5♂, 9–10/I/1982, F. Val col. (MZSP 932).

Diagnosis. Males differ from all other species of the genus by the acropodite process not enveloping the solenomere ( Fig. 7 A), by presence of a well-defined coxal apophysis in the gonopod ( Fig. 8 A, arrow) and dorsal surface of the diplosegments with conspicuous tubercles ( Fig. 7 D).

Redescription. Male (IBSP 4367). Coloration (in alcohol): Head reddish brown. Body reddish brown. Paranota tip with the same color as the body. Legs reddish. Telson brown. Total length: 42.4. Collum 1.43 long, 5.07 wide. Antennomere lengths (1>7): 0.69; 1.63; 1.16; 1.05; 1.36; 1.43; 0.40. Gonopod aperture 1.09 long, 1.65 wide. Telson 1.07. Gonopods: coxae with a distal row of bristles dorsally. With a coxal apophysis ( Fig. 8 A). Prefemoral region ventrally positioned. Prefemoral process long, reaching approximately the apex of the solenomere. Apex of the prefemoral process spatula-shaped with a serrated margin ( Fig. 7 A). Dorsal side of prefemoral region with several folds. Cingulum reduced ( Fig. 7 C). Solenomere elongated and sickle-shaped. Acropodite process flat, blade-shaped, not enveloping the solenomere ( Figs 7 A–B).

Female (IBSP 2332). Coloration (in alcohol) and body as in male. Total length 41. Collum 1.83 long, 5.42 wide. Telson 1.13. Cyphopods ( Figs 8 C–D) with thick bristles dispersed on each of the valves. Apical part of cyphopod concave, with the intermediate membrane projecting between the valves ( Fig. 8 D). Distribution. States of Paraná and Santa Catarina, Brazil, in areas containing the Brazilian Atlantic forest biome ( Por et al. 2005).

Figures

FIGURE 4. Dorsal views of anterior (A, D, G), midbody (B, E, H) and posterior (C, F, I) segments of Atlantodesmus eimeri (A – C), A. itapurensis (D – F) and A. pickeli (G – I).

FIGURE 7. Atlantodesmus eimeri. A, left gonopod in mesal view; B, left gonopod in ectal view; C, detail of the reduced cingulum; D, detail of the tubercles of the segments in dorsal view; E, Aperture of gonopod; F, detail of folds in the posterior margin of the aperture of gonopod. Arrow refers to the central support of gonopods sclerotized.

FIGURE 8. Atlantodesmus eimeri. A, male, detail of coxal apophysis; B, lateral projection on the seventh segment; C, right cyphopod in lateral view; D, right cyphopod in lateroventral view. Arrow refers to coxal apophysis in the gonopods.