Vaquerosella vaquerosensis (Kew, 1920)

Martínez-Melo, Alejandra & Alvarado-Ortega, Jesús, 2020, Vaquerosella perrillatae sp. nov.: A Miocene species of Echinarachniidae (Echinodermata: Clypeasteroida) from Baja California Sur, Mexico, Palaeontologia Electronica (a 14) 23 (1), pp. 1-18 : 9

Vaquerosella vaquerosensis (Kew, 1920) .

Scutella vaquerosensis Kew, 1920 .

Vaquerosella vaquerosensis . Durham, 1955.

Description (Kew, 1920). Large and thin, with outline undulating, truncated behind, and rounded anteriorly, with greater width immediately posterior to the center of the test; broadly notched in the paired ambulacral areas. Apical system slightly eccentric to the anterior; apex rising gently with the apical system or slightly anterior. Ambulacra much wider than the interambulacra at the ambitus; the anterior ambulacrum being twice as wide as the adjoining interambulacra. Petals broad, slightly elevated, and extending more than one-half the distance from the apical system to the ambitus, with the anterior pair somewhat shorter than the others. Anterior petaloid ambulacrum considerably wider than the rest, open distantly. Inner rows of pores of the paired petals converge slightly near the extremity; outer rows at first diverge and then converge to a greater degree, joining the inner rows at the ends of the petal. Interporiferous area about twice the width of each poriferous area. Peristome round and of comparatively small size. Food grooves well marked, straight, undivided, and extend to the edge of the test. Periproct round, small, and situated in a small notch in the margin.