FIGURE 1. Prostomial and pharyngeal structures of atokous specimens. Alitta succinea (ECOSUR-P2729): A, dorsal view; B, ventral view; C, lateral view. Alitta acutifolia without paragnaths on plate-like basement (ECOSUR-P2734): D, dorsal view; E, ventral view; F, lateral view. Alitta acutifolia with paragnaths on plate-like basement (ECOSUR-P2734): G, dorsal view; H, ventral view; I, lateral view. Arrows show the triangular fleshly pads between regions VI and VII−VIII; without paragnaths in A. succinea. Scale bars: A−C: 1 mm; D−I: 0.5 mm. cn, conical paragnath; pb, pointed bar paragnath; pp, pyramidal paragnath.

Published as part of Villalobos-Guerrero, Tulio F. & Carrera-Parra, Luis F., 2015, Redescription of Alitta succinea (Leuckart, 1847) and reinstatement of A. acutifolia (Ehlers, 1901) n. comb. based upon morphological and molecular data (Polychaeta: Nereididae), pp. 157-178 in Zootaxa 3919 (1) on page 163, DOI: 10.11646/zootaxa.3919.1.7, http://zenodo.org/record/245185