Paromola roseburgensis, Nyborg & Garassino & Vega, 2023

Nyborg, Torrey, Garassino, Alessandro & Vega, Francisco J., 2023, Validation of Paromola roseburgensis Nyborg & Garassino (Brachyura: Homolidae) from the early Eocene of Oregon, USA, Zootaxa 5318 (3), pp. 441-442 : 441

Paromola roseburgensis sp. nov.

( Fig. 1 )

Paromola roseburgensis Nyborg & Garassino, 2017: 140–142 , figs. 3, 4 [unavailable].

Type material. HOLOTYPE: UWBM 104435 , carapace preserving dorsal surface, front and one left pereiopod, carapace length 24.2 mm, width 23.0 mm, Early Eocene , Roseburg Formation, Coos County, Oregon, USA.

Diagnosis. Carapace widest at level of mesobranchial region, narrowing in anterior one-third; dorsal regions welldefined, marked by shallow incised grooves; rostrum long, pointed, moderately upturned; pseudorostral spines, slightly longer than rostrum, ornamented with small median external spinule; anterolateral margin with laterally-projecting spine; posterolateral margin strongly convex, rimmed by three laterally-projecting spines; posterior margin consisting of three arcs, one axially convex and two laterally concave; strongly spinose dorsal carapace.

Etymology. The species name alludes to the Roseburg Formation where the studied specimen was collected.

Remarks. A full description and figures of Paromola roseburgensis and stratigraphic account are given by Nyborg & Garassino (2017).

Figures

FIGURE 1. Paromola roseburgensis sp. nov., dorsal view of carapace, holotype, UWBM 104435, Early Eocene, Roseburg Formation, Coos County, Oregon, USA. Scale bar = 1 cm.