IO: infraocular canal, SO: supraocular
canal, T: temporal canal, ST: supratemporal canal, OT: otic canal, PO: post-otic canal, LL lateral line.
La serpiente cornuda mexicana esmeralda Ophryacus smaragdinus (Grunwald, Jones, Franz-Chavez & Ahumada-Carrillo, 2015), es una especie semiarboricola de cola prensil, cuyas caracteristicas principales son: a) una escama cornea supraocular
que asemeja un cuerno no en contacto inmediato con el ojo, b) menos de 30 escamas interrictales, y c) regularmente menos de 10 supralabiales a cada lado de la cabeza (Grunwald et al., 2015).
The margins of all spines and ridges are smooth through the preflexion stage, but by the early postflexion stage the parietal and supraocular
ridges and their spines and preopercular spines PPO3, PPO4, and APO4 are serrate.
tesselata E examined for the character, the circumorbital scale series terminated on each side of the head at the level of the second supraocular
sutures and thus were designated incomplete (Table 3).
The lizard has a group of enlarged to moderately enlarged postantebrachial scales, abruptly enlarged mesoptychial scales bordering the gular fold, circumorbital series anteriorly on each side only bordering the separation between the third and fourth supraocular
scales, and five rather than three parietals.
Other significant counts and characters include the following: dorsal-fin spines XIII, dorsal-fin rays 13; anal-fin spines III, anal-fin rays 6; pectoralfin rays 18, 18; lateral-line pores 28+1, lateralline scales 47; total gill rakers 27 (7 + 20); second anal-fin spine about the same length as third spine; nasal, preocular, supraocular
, postocular, tympanic, parietal, and nuchal head spines present, all relatively strong and sharp; lower edge of opercle smooth, spines absent; posterior edge of maxilla terminating at posterior rim of orbit; mandible scaled; lachrymal protrusions strong, rounded; symphyseal knob weak.
Three or 4 preocular spines strongly retrorse; supraocular
and postocular spines rounded, less developed.
The Brazilian specimen features agree with those of the typical form (Figures 1-10): head and carapace surface covered with long hairs; head broad and without supraocular
depression; antennule and antenna densely ciliated; anterior seta on the penultimate segment of the female's first trunk limb toothed; postabdomen with seven to ten lateral feathered teeth and one short bident tooth; ephippium with two eggs, and covered with brown polygonal cells; males hairy, with bent antennules, first trunk limb with large hook on the endopodite and long seta on the exopodite.