Validation of Ophthalmoplax andina Guzmán, Bermúdez, Gómez-Cruz, & Vega (Decapoda: Brachyura: Portunoidea) from the late Campanian, Upper Cretaceous of Colombia Author Guzmán, Walter Paleoexplorer S. A. S., Carrera 32 A No. 25 - 10. Bogotá D. C., Colombia. Author Bermúdez, Hermann D. Paleoexplorer S. A. S., Carrera 32 A No. 25 - 10. Bogotá D. C., Colombia. Author Gómez-Cruz, Arley De Jesús Universidad de Caldas, Facultad de Ciencias, Departamento de Ciencias Geológicas, Calle 65, No. 26 - 10, Manizales, Caldas, Colombia. Author Vega, Francisco J. Instituto de Geología, UNAM, Ciudad Universitaria, Coyoacán, México DF 04510, Mexico. text Zootaxa 2023 2023-07-12 5315 5 495 497 http://dx.doi.org/10.11646/zootaxa.5315.5.8 journal article 59212 10.11646/zootaxa.5315.5.8 45738bc1-91a2-4a6a-a6d5-a63d3ae08edd 1175-5326 8142423 693D36A6-EC90-42BF-A922-7F22BFBC14F8 Ophthalmoplax andina sp. nov. ( Fig. 1 ) Ophthalmoplax andina Guzmán, Bermúdez, Gómez-Cruz & Vega, 2016: 95–101 , figs. 3–5A. [Not available] FIGURE 1. Ophthalmoplax andina sp. nov. , dorsal view of carapace, holotype UN-DG-CR-021, late Campanian, Lodolitas de Aguacaliente Formation, Guadalupe Group, (Cordillera Oriental, Colombian Andes), Colombia. Scale bar = 1 cm. Type material. HOLOTYPE : UN-DG-CR-021, carapace preserving dorsal surface, carapace length 8.5 mm , width 14.4 mm , late Campanian shales of the Lodolitas de Aguacaliente Formation , Guadalupe Group , Colombia . PARATYPE : UN- DG-CR-021, carapace preserving dorsal surface and base of long left lateral spine, length about 21.6 mm , width 42.1 mm , same locality as holotype. Diagnosis. Carapace small, wider than long, subquadrate; rostrum bifid; orbital spines sharp and short. Dorsal carapace surface mostly defined by sharp transverse ridges and grooves, deep grooves demarcating mesobranchial region; mesobranchial region with wide transverse ridges with fine tubercles on crests, connected to long, sharp lateral spine. Etymology. The name of the new species is related to the Andean region of Colombia ; used as a noun in apposition. Remarks. A full description and figures of Ophthalmoplax andina and stratigraphic account are given by Guzmán et al . (2016) .