Simocephalus (Coronocephalus) serrulatus (Koch, 1841)

Santos, Arielly De S., Andrade, Daniel Da S., Sousa, Francisco Diogo Rocha & Mugnai, Riccardo, 2023, Three new records of Cladocera (Crustacea: Branchiopoda) for the State of Maranhão, Northeastern Brazil, Zootaxa 5319 (2), pp. 224-234 : 226-227

Simocephalus (Coronocephalus) serrulatus (Koch, 1841) ( Figs. 2 A–C )

Material examined. 10 specimens, collection number CINCAA 0090.

Remarks. This species has a right or acute angled anterior margin of the head and is armed with small spines, the typical characteristic of the subgenus Coronocephalus . ( Fig. 2B ). Simocephalus serrulatus differs from Simocephalus semiserratus Sars, 1901 in the posterior-dorsal projection of the carapace, which in the former is larger and more marked ( Orlova-Bienkowskaja 1998).

Figures

FIGURE 2. Simocephalus serrulatus (Koch, 1841). A: Habitus. B: head. C: Posterior-dorsal margin. Scale bar = 100 µm.