Enchiridium periommatum Bock, 1913

Cuadrado, Daniel, Hernández-Gonzalez, Alejandro, Noreña, Carolina & Simões, Nuno, 2024, Polyclads (Platyhelminthes) in the southern Gulf of Mexico: unveiling biodiversity and descriptions of two new species, ZooKeys 1221, pp. 103-144 : 103-144

Enchiridium periommatum Bock, 1913

Fig. 5 B

Material examined.

Yucatan coast, Mexico • 1; Arrecife Alacranes; 22.4 ° N, 89.7 ° W; 1 m; 3 Nov. 2017; A. Hernández leg.; CRPPY - 0001 • 1; Arrecife Alacranes; 22.4 ° N, 89.7 ° W; 1 m; 3 Nov. 2017; A. Hernández leg.; CRPPY - 0003 • 2; Arrecife Alacranes; 22.4 ° N, 89.7 ° W; 1 m; 4 Nov. 2017; A. Hernández leg.; CRPPY - 0005 • 1; Arrecife Alacranes; 22.4 ° N, 89.7 ° W; 2 m; 4 Nov. 2017; A. Hernández leg.; CRPPY - 0007; Quintana Roo coast, Mexico • 1; Mahahual; 18.6 ° N, 87.7 ° W; 15 m; 18 Mar. 2018; A. Hernández leg.; CRPPY - 0042; Yucatan coast, Mexico • 1; Dzilam; 21.5 ° N, 88.9 ° W; 13 m; 10 May 2018; A. Hernández leg.; CRPPY - 0098 .

Distribution.

The species was originally described in Thatch Island, US Virgin Islands ( Bock 1913), later collected in Jamaica ( Hyman 1955), and also known from Texas to Florida, Gulf of Mexico ( Hyman 1955). This is a new record for the coasts of Campeche and Quintana Roo ( Mexico).

Description.

Body elongated, 1.5 cm in length and 0.5 cm in width, with a rounded anterior end and a tapered posterior end. Marginal eyes densely distributed along the anterior margin; cerebral eyes in a heart-shaped cluster. Translucent white background speckled with dense brown to orange spots that gradually decrease in number towards the edges (Fig. 5 B ). Pharynx, male and female reproductive organs, as well as the sucker are located in the anterior 1 / 2 of the body, a distinctive feature of this species.

Figures

Figure 5. A Prosthiostomum utarum dorsal view B Enchiridium periommatum in situ C Enchiridium evelinae dorsal view D Enchiridium evelinae in situ.