Heteropyge bidens ( Schubart, 1945 )

Iniesta, Luiz F. M., Bouzan, Rodrigo S. & Brescovit, Antonio D., 2019, On the millipede genus Heteropyge: description of the adults of H. araguayensis and revalidation of H. bidens (Diplopoda: Spirostreptida: Spirostreptidae), Iheringia, Série Zoologia (e 2019032) 109, pp. 1-13 : 8-11

Heteropyge bidens ( Schubart, 1945) , sp. reval.

( Figs 27−29 , 33−35 , 39−41 )

Orthoporus bidens SCHUBART, 1945:84 . Male holotype from Ilha dos Pombos [21°50’39.65”S; 42°34’45.51”W], Carmo, Rio de Janeiro, Brazil, VI.1940, A. L. Gomes leg., deposited in MZSP, examined; DEMANGE, 1964:200.

Heteropyge bidens . HOffMAN, 1960:113; MAURIÈS, 1975:1272; KRABBE, 1982:333 (as syn. of H. cayennophilus Silvestri ).

Revalidation. The original description and the figures provided by SCHUBART (1945) are highly detailed, clearly showing the differences between this species and H. cayennophilus . From a detailed examination of both species, especially the distolateral metaplical process (dmp, Fig. 34 ), absence of apicomesal processes on the proplica ( Fig. 34 ) and the first pair of legs ( Figs 39-43 ), H. bidens is revalidated as a distinct species.

Additional material examined. BRAZIL, Pernambuco: Igarassu (7°50.069’S, 34°54.347’W), Reserva Ecológica Charles Darwin , ♂, 08.VIII.2011, A. M. Souza leg. ( UFPB - Myr 0045) ; Rio de Janeiro: São Gonçalo (22°49’38.41”S; 43°03’50.06”W), Fazenda Engenho Novo, ♂, 08.II.1947, Aguirre leg., ( MZSP) ; Paraty (23°13’12.20”S; 44°43’13.71”W), 3♂ ♀, 19.VII.1956, O. Schubart leg. ( MZSP 1014 ) ; Rio de Janeiro, Tijuca (22°55’59.62”S; 43°14’28.16”W), ♂, no data, O. Schubart leg. ( MZSP 1013 ) ; Rio de Janeiro, Jacarepaguá (22°58’7.00”S; 43°23’27.09”W), ♂, no data, O. Schubart leg. ( MZSP 1012 ) . São Paulo: Santos (23°58’10.90”S; 46°19’41.16”W), 2♂, 01. V.1947, O. Schubart leg. ( MZSP) .

Diagnosis. Males differ from those of congeners by the absence of a distal process on the proplica; distolateral process on metaplica (dmp) starting diagonally from proplica ( Fig. 34 ); a thickened and contiguous distal edge (detail on dmp, Fig. 34 ), with ectal tip directed basally (posterior view in the Fig. 35 ). Besides this, it differs from H. cayennophilus by the subtriangular process on prefemur in the first pair of legs ( Fig. 40 ).

Description. Male described by SCHUBART (1945). Additional data here provided.

Male ( MZSP 1014) ( Figs 27-29 ). Specimen fragmented. Total length: 25 mm. Maximum vertical diameter: 2 mm.

First pair of legs: coxae rounded, with 6+6 setiform setae in a curved row on mesal region ( Figs 39, 40 ). Prefemur square; 2+2 distomesal setae; a subtriangular prefemoral process; a group of small scattered setae (around 10) at base of the process ( Fig. 40 ). Femur, postfemur and tibia with membranous ventral pads ( Fig. 39 ). Second pair of legs: coxae rounded. Prefemur appressed to and contiguous with distal portion of coxae; postfemur and tibia with short membranous ventral pads ( Fig. 41 ). Penis elongated and rounded.

Gonopod ( Figs 33−35 ). Sternum semi-circular, linguliform. Paracoxite (px) rounded. Proplica short (pp); slightly curved; without apicomesal process. Metaplica elongated (mp) ( Fig. 35 ); distolateral metaplical (dmp) process ( Fig. 34 ) starting diagonally from proplica; with a thickened and contiguous distal edge (in anterior view). Inner process of metaplica (ip) evident; stout and rounded; with a thickened fold (in anterior view, Fig. 33 ) just behind sternum. Telopodite bulky; short antetorsal process; a large, lamellar, broad expansion. Solenomere in mesal region with one weak, 360° torsion; partially covered by lamellar expansion.

Distribution. Known from the states of São Paulo, Rio de Janeiro and Pernambuco ( SCHUBART, 1945).

Figures

Figs 27−32. Stereoscopic images. Figs 27-29, Heteropyge bidens (Schubart, 1945) male (MZSP 1014): 27, anterior region; 28, posterior region; 29, ventral view. Figs 30-32, Heteropyge cayennophilus (Silvestri, 1897) male (IBSP 636): 30, anterior region; 31, posterior region; 32, ventral view. Scale bars: 27, 1 mm; 28, 1 mm; 29, 1 mm; 30, 1 mm; 31, 500 µm; 32, 500 µm.

Figs 33−38. Stereoscopic images of the gonopods. Figs 33-35, Heteropyge bidens (Schubart, 1945) male (MZSP 1014): 33, anterior view; 34, detail of the distal region in anterior view; 35, posterior view. Figs 36-38, Heteropyge cayennophilus (Silvestri, 1897) male (IBSP 636): 36, anterior view; 37, detail of the distal region in anterior view; 38, posterior view. Scale bars: 33, 200 µm; 34, 100 µm; 35, 200 µm; 36, 500 µm; 37, 200 µm; 38, 500 µm.

Figs 39−44. Stereoscopic images of the first and second pair of legs. Figs 39-41, Heteropyge bidens (Schubart, 1945), male (MZSP 1014): 39, first pair of legs in anterior view; 40, detail of the prefemoral process in anterior view (the arrows refers to prefemoral process); 41, second pair of legs in posterior view. Figs 42-44, Heteropyge cayennophilus (Silvestri, 1897), male (IBSP 636): 42, first pair of legs in anterior view; 43, detail of the prefemoral process in anterior view (the arrows refers to prefemoral process); 44, second pair of legs in posterior view. Scale bars: Fig. 39, 400 µm; 40, 200 µm; 41, 400 µm; 42, 500 µm; 43, 250 µm; 44, 500 µm.