Rhinocricus guaritas, Rodrigues, Patrícia E. S., Ott, Ricardo & Rodrigues, Everton N. L., 2012

Rodrigues, Patrícia E. S., Ott, Ricardo & Rodrigues, Everton N. L., 2012, New species and new records of millipedes of the genus Rhinocricus Karsch, 1881 (Spirobolida: Rhinocricidae) from southern Brazil, Zootaxa 3172, pp. 55-64 : 59-60

Rhinocricus guaritas sp. nov.

( Figs. 16–22 )

Types. Holotype male from Caçapava do Sul, Rio Grande do Sul, Brazil, 29.X.1975, P. C. Braum leg. (MCN 062). Paratype female, same data as the holotype (MCN 735).

Etymology. The epithet refers to the name of a geological formation very characteristic and beautiful, found in the type locality.

Diagnosis. Rhinocricus guaritas is close to Rhinocricus balanus Chamberlin, 1955 by the similar shape of the anterior gonopod sternite with narrowed base and evident coxites, but differs from R. balanus by the longer and broader median process of the sternite ( Fig. 16 ).

Description. Male, holotype ( Figs. 19, 20 ). With 51 segments. Length 67. Width 6. Clypeus olivaceous with spaced 2–2 supra-labial setae. Labrum yellowish-brown with 10–10 setae. Antennae brown, numerous sensory cones (around 18). Collum olivaceous, with yellowish margins and ventro-lateral rounded borders. Prozonites grayish-olive; metazonites olive-brown with yellowish-brown borders. Epiproct olive, distally yellowish-brown and rounded, surpassing the paraproct. Paraproct dark-olive. Hypoproct yellowish-brown. Legs brown, with third and fourth coxae elongate. Ocelli dark-brown, disposed in seven rows, in the following numeric order (dorsal to ventral): 8, 9, 8, 8, 6, 4, 1, right and 8, 8, 8, 7, 6, 4, 3, left. Ozopores dark-brown, beginning at sixth segment. Scobinae beginning at seventh segment.

Anterior gonopod ( Figs. 16, 17 ). Sternite with broad-base and sharp distal end, not surpassing the length of coxites and telepodites. Coxite longer than wide, internal lobe of the same size as telepodite. Telepodite with small rounded lobe.

Posterior gonopod ( Fig. 18 ). Solenomere longer than tibiotarsus, with sharp pointed and laminate distal end. Tibiotarsus lamellate, externally with small rounded salience, internally with sharp and projected apex.

Female, paratype ( Figs. 21, 22 ). As male except as noted. With 52 segments. Length 85. Width 7. Coloration as in male, except the lighter colored metazonites, which have a more orange-colored border. Labrum with 10–10 labral setae. Antennae with numerous sensory cones. Ocelli in seven rows in the following numeric order (dorsal to ventral): 7, 9, 9, 8, 6, 5, 3 right and 5, 7, 9, 7, 5, 4, 2 left. Ozopores beginning at sixth segment, first pore located below the line of others (on the left lacking pores from 13 to 16 segment). Scobinae beginning from seventh segment.

Distribution: Known only from the type locality (Caçapava do Sul, state of Rio Grande do Sul, Brazil).

Figures

FIGURES 16 – 22. Rhinocricus guaritas sp. nov. 16 – 17, anterior gonopod 16, anterior view. 17, posterior view. 18, right posterior gonopod, posterior view. 19 – 20, male, lateral view. 19 posterior segments. 20, anterior segments. 21 – 22, female, lateral view. 21, posterior segments. 22, anterior segments. Scale bar = 1.0 mm (Figs. 16 – 18).