Echinoidea taxon details
original description
Martínez-Melo, A.; Alvarado-Ortega, J. (2020). Vaquerosella perrillatae sp. nov.: A Miocene species of Echinarachniidae (Echinodermata: Clypeasteroida) from Baja California Sur, Mexico. <em>Palaeontologia Electronica.</em> 23(1:a14): 1-18., available online at https://doi.org/10.26879/1040 page(s): 9-13; figs 4-6, tab. 2 [details] Available for editors
From editor or global species database
Diagnosis Test length and width nearly equal. Petal length three-fourths the distance from apical system to the ambitus. Ambitus with shallow indentations in each suture between columns of plates, resulting in a crenate margin. Anal notch small, slightly conspicuous, with soft projections on either side of posterior notch. Conspicuous notches at the ambulacra I and V, with soft projections on either side of lateral notch, acquiring a squared shape at the posterior margin. [details]
Etymology The specific name honors Dra. María del Carmen Perrillat, former curator of the Colección Nacional de Paleontología, Instituto de Geología, UNAM, in gratitude for her efforts to preserve the Mexican paleontological heritage. [details]
Fossil range Miocene [details]
Stratigraphy San Ignacio Formation [details]
Type locality IGM-loc 248, the Arroyo San Ignacio site, San Ignacio Formation, coordinates 27°09'22.00"N and 113°01'52.00"W, in the main drain of the San Ignacio River, Two paratypes are from the IGM-loc 265, Arroyo Nacho, located between the coordinates 27°09'22.00"N and 113°01'52.00"W. Both sites are into Mulegé Municipality, Baja California Sur, Mexico. [details]
Type material Holotype: IGM 11463; Paratypes: IGM 11464 to 11470
All specimens are from IGM-loc 248 except for IGM 11468 and IGM 11469 that were collected in IGM-loc 265.
IGM = Colección Nacional de Paleontología, Instituto de Geología, Universidad Nacional Autónoma de
México, México [details]
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