Calliopiidae

G.O. Sars, 1893

Genus Guides

Calliopius

Calliopiidae is a of hyperbenthic amphipods distributed across the North Atlantic and North Pacific oceans. Members inhabit diverse marine environments including subtidal waters, hydrothermal vents, and the hyperbenthic zone immediately above the seafloor. The family includes the newly described Bathya from deep-sea hydrothermal vents and Calliopius associated with macroalgae.

Calliopius laeviusculus by (c) Leïla Brunner, some rights reserved (CC BY), uploaded by Leïla Brunner. Used under a CC-BY license.

Calliopius by (c) Zihao Wang, some rights reserved (CC BY), uploaded by Zihao Wang. Used under a CC-BY license.

Pronunciation

How to pronounce Calliopiidae: //kəˌlaɪ.oʊˈpi.aɪ.iːdiː//

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Images

Habitat

Hyperbenthic zone (water column immediately above seafloor). Specific occur in subtidal waters among floating and brown (e.g., Sargassum horneri), and in chemically reduced deep-sea environments including hydrothermal vent systems.

Distribution

North Atlantic: seas around the Greenland-Iceland-Faeroe-Ridge. North-west Pacific: Okinawa Trough, Korean waters (Ulleungdo Island, East Sea). Records from Denmark, Norway, and Sweden.

Host Associations

Sargassum horneri - floating ; substrate for Calliopius ulleungensis

Ecological Role

Hyperbenthic amphipods occupy a key position in the water column immediately above the seafloor, serving as potential prey for demersal and contributing to nutrient cycling in benthic-pelagic coupling.

More Details

Taxonomic note

placement within Amphipoda follows the classification: Senticaudata > Hadziida > Hadziidira > Calliopioidea > Calliopiidae. The family has been recently expanded with deep-sea vent-associated (Bathya brevicarpus).

Biogeographic patterns

The exhibits distinct biogeographic patterns across different seas in the North Atlantic region around the Greenland-Iceland-Faeroe-Ridge, suggesting sensitivity to oceanographic conditions.