Oxypyge ferruginipes Chamberlin, 1922

Bond, Jason E. & Marek, Paul E., 2003, Rhinocricidae Systematics I: The taxonomic placement of the species of Zipyge Chamberlin, 1925 and Oxypygides Chamberlin, 1922 (Diplopoda: Spirobolida: Rhinocricidae: Oxypyginae), Zootaxa 292, pp. 1-8 : 5-6

Oxypyge ferruginipes Chamberlin, 1922 ( Figs. 7–11 )

Oxypyge ferruginipes Chamberlin 1922 . Proceedings of the U.S. National Museum. 60(8):27, pl. 11, figs. 8–12.

Zipyge ferruginipes ( Chamberlin 1922) , Chamberlin 1925. Proceedings of the Biological Society of Washington. 38:40.

Type material examined: Male holotype from Guatemala, Cacao, coll. O.F. Cook, April 1906 (deposited in the United States National Museum, Smithsonian).

Additional material examined from near type locality: Male from Guatemala, Dept. Izabal, Finca Las Ilusiones (along Highway CA9), 26.8 km bearing 220 true N from Puerto Barrios, elev. 95 m, coll. J. Bond, 4 June 2000 (deposited in the Field Museum of Natural History).

Male holotype: Color of preserved material badly faded, head, antennae, and collum very light yellowish brown ( Fig. 7 ). Collum slightly darker with lighter margins. All other segments distinctly banded. Prozonite light cream color, metazonite dark brown with light cream colored posterior margin. Chamberlin (1922) described the coloration of this specimen as “olive black, running into brown” with ferruginous legs.

Antennae with 4 sensory cones, flattened laterally, incrassate distally. 10–10 labral setae, clypeal groove dark and distinct, 26 ocelli. Width 3.77 (collum), 4.43 (midbody), 3.89 (45), 50 ring segments. Distinct scobinae on segments ~7–46, diminishing in size posteriorly. Tarsi lacking ventral pads. Epiproct short, not extending beyond paraprocts. Anal valves elongate, with dorsal hook ( Fig. 8 ). Hypoproct long, triangular with blunt terminal end, not extending beyond paraprocts.

Anterior gonopod and telopodite of posterior gonopod as illustrated in Figs. 9–11 . Sternum narrow distally with distinct ridge along medial aspect ( Fig. 10 ), Cx and Tp as in other rhinocricids ( Fig. 9 ). Posterior gonopod telopod (Tp, Fig. 11 ) long and spatulate distally with a membranous interior. Seminal canal (Sc) visible, extending from the Cx to the Sm. Seventh segmental ring posteroventrally modified as a postgenital bar to accommodate gonopods. Posterior gonopods in situ extending ~2.0 mm from gonopodal cavity.

Remarks: Chamberlin (1925) separated this species from Oxypyge and established Zipyge because it had more slender antennae with only four sensory cones. As pointed out by Hoffman (1974) antennal characters, number of sensory cones in particular, are not “at all useful in the definition of “natural” genera in this family”. The combination of gonopodal and terminal segment morphology support placement of this species in Oxypyge .

Figures

FIGURES 7 – 11. Oxypyge ferruginipes Chamberlin, 1922, male holotype. 7, lateral view of male anterior segments. 5, posterior segments, male. 9, anterior gonopod, posterior view. 10, anterior gonopod, anterior view. 11, left posterior gonopod. [Scale bar = 1.0 mm (Figs. 9 – 11)]