Rhinocricus bifurcatus, Rodrigues & Rodrigues & Ott, 2018

Rodrigues, Patrícia E. S., Rodrigues, Everton N. L. & Ott, Ricardo, 2018, Four new species of Rhinocricus (Diplopoda: Spirobolida: Rhinocricidae) from Brazil, Iheringia, Série Zoologia (e 2018031) 108, pp. 1-5 : 2-3

Rhinocricus bifurcatus sp. nov.

( Figs 4-6 , 9, 10 )

urn:lsid:zoobank.org:act:CE570255-AF01-4AE4-BCCC-0CB603452752

Type material. Male holotype from Foz do Iguaçu, 25°32’50.1”S, 54°34’44.0”W, Paraná, Brazil, 09-11. XI.1991, A. B. Bonaldo leg. ( MCN 301). Paratypes: ♂ and ♀ from Tenente Portela , 27°22’16”S, 53°45’30”W, Rio Grande do SUl, Brazil, 29.XI.1978, H. Bischoff leg. (MCN 137) .

Etymology. The specific epithet is a Latin adjective and refers to the bifurcate shape of the external branch of the posterior gonopod.

Diagnosis. Rhinocricus bifurcatus sp. nov. resembles R. moestus Brölemann, 1901 (see BRÖLEMANN, 1901:200, figs 255-261) and R. divaricatus Schubart, 1951 (see SCHUBART, 1951:254, figs 21, 22) by having the external branch of the posterior gonopod bifurcate ( Fig. 6 ) and by the shape of the anterior gonopod ( Fig. 4 ), bUt differs by the subtriangular sternite and by the coxite shorter than the telepodite ( Fig. 4 ).

Description. Male holotype ( Figs 9, 10 ) with 56 rings. Length 65. Width 6. General coloration brown. Clypeus with spaced 2-2 sUpra-labral setae. Antennae flattened, the three last antennomeres with some setae. Prozonites gray; metazonites with yellowish brown posterior margins. Ocelli black, arranged in seven rows.

Ozopores beginning at the sixth ring. Scobinae semicircular beginning at sixth ring. Third and fourth pairs of legs with elongated coxae. Telson ( Fig. 10 ) with epiproct elongated surpassing the paraprocts. Hypoproct semicircular.

Anterior gonopod ( Figs 4, 5 ) with a subtriangular sternite longer than wide, distally rounded. Sternite shorter than coxite and telopodite. Coxite wide with an internal acute lobe, which is shorter than the telopodite and has an evident distal lobe.

Posterior gonopod ( Fig. 6 ). Solenomere distally pointed, longer than external branch. External branch slender, distally bifurcated, internally pointed and externally rounded.

Female paratype with 57 rings. Length 78. Width 7. General coloration light brown.

Distribution. Known from southern Brazil, Foz do Iguaçu, state of Paraná and Tenente Portela, state of Rio Grande do Sul.

Figures

Figs 4-6. Rhinocricus bifurcatus sp. nov. Figs 4,5, anterior gonopod: 4, anterior view; 5, posterior view. Fig. 6, posterior gonopod (cx, coxite; st, sternite; slm, solenomere; tp, telopodite; eb, external branch; lb, lobe of telopodite). Scale bar = 1.0 mm.

Figs 7-10. Rhinocricus sooretama sp. nov. Figs 7, 8, holotype ♂, lateral view: 7, anterior rings; 8, posterior rings. Figs 9, 10, Rhinocricus bifurcatus holotype ♂, lateral view: 9, anterior rings; 10, posterior rings (co, collUm; II, second ring; III, third ring; IV, foUr ring; V, five ring; IV, six ring; par, paraproct; ep, epiproct; hyp, hypoproct). Scale bar = 2.0 mm.