Ctenocheles cookei ( Rathbun, 1935 )

Tshudy, Dale M., Hyžný, Matúš, Veselská, Martina Kočová & Jagt, John W. M., 2022, Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae), Palaeontologia Electronica (a 20) 25 (2), pp. 1-31 : 25-26

Ctenocheles cookei ( Rathbun, 1935)

Figure 14A–B

1935 Ischnodactylus cookei Rathbun , pp. 63-64, pl. 14, figs. 1‒6.

1935 Ischnodactylus cookei lowei Rathbun , p. 64.

1941 Oncopareia cookei (Rathbun) ; Mertin, p. 179.

2010 Oncopareia cookei (Rathbun) ; Schweitzer et al., p. 31.

2010 Ctenocheles cookei (Rathbun) ; Schweitzer et al., p. 40.

2014 Ctenocheles cookei (Rathbun) ; Hyžný and Dulai, table 2.

2015 Ctenocheles cookei (Rathbun) ; Hyžný and Klompmaker, supplement 1.

Material examined. Tshudy (1993, p. 361) examined the holotype ( USNM 371511 ) and identified the two incomplete palms of isolated claws as

Ctenocheles cookei lowei .

Remarks. Mertin (1941) synonymized Ischnodactylus with Oncopareia and considered I. cookei to be a species of Oncopareia . On the basis of palm shape and the downflexed fixed finger, Tshudy

(1993, pp. 360‒361) classified the isolated claw material of Ischnodactylus cookei as belonging to the axiidean ghost shrimp genus Ctenocheles .

Hyžný and Dulai (2014) and Hyžný and Klompmaker (2015) also recognized this form as a representative of Ctenocheles .

Range and occurrence. Lower Eocene (Sucar-

noochee beds of the Midway Formation) of Wilcox

County, Alabama; and upper Eocene (Jackson

Formation) of Yazoo City, Mississippi, USA ( Rathbun, 1935).

Figures

FIGURE 14. Non-astacidean decapod species with pectinate claws. A–B, Ctenocheles cookei (Rathbun, 1935), left propodus in inner (A) and outer (B) lateral views (holotype, USNM 371511). C–D, Ctenocheles cultellus (Rathbun, 1935), incomplete dactylus (A) and fixed finger (B) in upper, lower and lateral views (from Rathbun, 1935, pl. 14, figs. 7–12). E, Ctenocheles inaequidens (Pelseneer, 1886), right major claw (holotype, from Pelseneer, 1886, text-fig. 1). F,?Ctenocheles pectiniformis (Böhm, 1891), isolated claw (from Böhm, 1891, pl. 1, fig. 2, 2a). G, “Ischnodactylus” dentatus Rathbun, 1935, isolated finger (USNM MO 495109).