Poecilostomatoida

Classification

Phylum: Arthropoda
Subphylum: Crustacea
Class: Maxillopoda
Subclass: Copepoda
Order: Poecilostomatoida

Pronunciation

How to pronounce Poecilostomatoida: /ˌpisɪloʊˌstɒməˈtɔɪdə/

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Summary

Poecilostomatoida is a suborder of copepods characterized by a transverse slit mouth, modified antennae, and a metamorphic life cycle, primarily found as ectoparasites in marine environments, with some adaptations to freshwater habitats.

Physical Characteristics

Mouth represented by a transverse slit partially covered by an overhanging labrum resembling an upper lip; mandibles generally falcate (sickle-shaped); antennules frequently reduced in size; antennae modified to terminate in small hooks or claws.

Habitat

Marine environments, anchialine caves, deep sea vents (hydrothermal vents and cold seeps); some families have adapted to freshwater habitats.

Life Cycle

Embryos carried in paired or single sacs attached to the first abdominal somite; larval development is metamorphic with immature forms differing greatly from adults.

Ecosystem Role

Many are ectoparasites of saltwater fish or invertebrates; one family has evolved an endoparasitic mode of life.