Three new species of Myzomolgus are described as associates of sipunculans from a tidal flat in Phuket, Thailand. As diagnostic features, Myzomolgus leptocercosus n. sp. has elongate caudal rami which are 10.7 times longer than wide, 5 setae and a conical process on the first antennular segment, an armature formula 1, 0, 1+sucker, and 6 of antenna, and an inner coxal seta on all swimming legs. Myzomolgus spatulatus n. sp. lacks a rostrum, but bears 4 setae and a spatulate process on the first antennular segment, an armature formula 0, 0, 2+sucker, and 6 of the antenna, the inner coxal seta on legs 1-3, and 5 armture elements on the third endopodal segment of legs 1-3. Myzomolgus cucullatus n. sp. has short caudal rami which are 1.60 times longer than wide, a broad, hood-like tergite of fouth pedigerous somite, 4 setae only on the first antennular segment, the armature formula 0. 0. 2+sucker, and 6 of the antenna, and no iiner coxal seta on the swimming legs.
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Kim, I.-H. 2001. Redescription of Catinia plana Bocquet and Stock, 1957 and description of two new species of Myzomolgus (Copepoda, Poecilostomatoida, Catiniidae) associated with sipunculans in Korea. The Korean Journal of Systematic Zoology 17(1):71-89.
Kim, I.-H. and J.-S. Hong. 2014. Copepods (Crustacea, Copepoda, Cyclopoida) associated with marine invertebrates from Thailand. Animal Systematics, Evolution and Diversity 30(4):274-318. https://doi.org/10.5635/ASED. 2014.30.4.274