Enchiridium evelinae Marcus, 1949

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 evelinae Marcus, 1949

Fig. 5 C, D

Material examined.

Yucatan coast, Mexico • 1; Bajos de Sisal ; 21.2 ° N, 90.0 ° W; 1 m; 10 Sep. 2017; A. Hernández leg.; CRPPY - 0033 .

Distribution.

Recorded in São Paulo ( Marcus 1950), Rio Grande do Norte, and Alagoas ( Bahia et al. 2012, 2014, 2015; Bahia and Schrödl 2018) in Brazil and Panama ( Rawlinson 2008). It is also known in Curaçao ( Marcus and Marcus 1968). This work represents a new record for the Yucatan coast. New record for the Gulf of Mexico.

Description.

Body shape elongated, 3 cm in length and 1 cm in width. Body cream-coloured with brown, orange, and yellow spots arranged densely along the midline and paler towards the margins (Fig. 5 C, D ). Tubular pharynx extends to ~ 1 / 3 of the body’s length. Reproductive male apparatus with an enclosed seminal vesicle and two prostatic vesicles included in a common muscular bulb, and a long penis papilla armed with a stylet opening in a long male atrium.

Remarks.

The spots disappear after fixation and, according to Marcus (1950), the pigmentation of these spots is lipoid (Fig. 5 C, D ). The specimens recorded here have a lower density of dots compared to the specimens described in Bahia et al. (2014: fig. 14).

Figures

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