Pandaloidea is a superfamily of caridean shrimp, belonging to the order Decapoda. This diverse group encompasses several families of marine shrimp, many of which are commercially important species. They are commonly referred to as pandalid shrimp or sometimes included under the broader term "true shrimp."
Taxonomy and Classification
Pandaloidea belongs to the following taxonomic hierarchy:
- Kingdom: Animalia
- Phylum: Arthropoda
- Subphylum: Crustacea
- Class: Malacostraca
- Order: Decapoda
- Suborder: Pleocyemata
- Infraorder: Caridea
- Superfamily: Pandaloidea
This superfamily is distinguished from other caridean superfamilies by a combination of morphological characteristics, particularly related to their gill structure, rostrum, and the arrangement of their pereiopods (walking legs).
Characteristics
Members of the Pandaloidea superfamily typically exhibit the general body plan of caridean shrimp, characterized by a compressed body, a prominent rostrum (a forward-projecting spike from the carapace), and well-developed pleopods (swimming legs). While there is variation among families and genera, common traits include:
- Habitat: Many pandaloids are benthic or benthopelagic, inhabiting continental shelves and slopes, often in deep-water environments, though some species are found in shallower waters.
- Diet: They are generally omnivorous, feeding on small invertebrates, detritus, and algae.
- Reproduction: Like many caridean shrimp, they undergo external fertilization and larval development, with females carrying eggs attached to their pleopods. Some species exhibit protandric hermaphroditism, starting life as males and later changing to females.
Ecological and Economic Importance
Pandaloidea play a significant role in marine ecosystems as part of the food web, serving as prey for fish, cephalopods, and marine mammals.
Economically, several species within this superfamily are highly valued for human consumption, forming the basis of substantial commercial fisheries worldwide. The most prominent example is the northern shrimp or cold-water shrimp (Pandalus borealis), a species primarily caught in the North Atlantic and North Pacific oceans, known for its sweet flavor and use in various culinary applications. Other commercially important species also exist within the superfamily.
Families
The primary families recognized within the superfamily Pandaloidea include:
- Pandalidae: This is the most species-rich and commercially important family, including genera like Pandalus, Plesionika, and Heterocarpus. Many species are deep-water inhabitants.
- Oplophoridae: This family includes bathypelagic (deep-sea pelagic) shrimp, often characterized by light organs (photophores) and a distinctive morphology adapted to life in the open ocean depths.
See Also
- Caridea
- Decapoda
- Shrimp
Categories
- Crustaceans
- Shrimp
- Caridean Shrimp
- Decapoda
- Marine Invertebrates
- Superfamilies of Arthropods