APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Tryphosa nana (Krøyer, 1846) syn. Orchomenella nana and Orchomene nana - A tryphosid amphipod
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Tryphosid amphipod
Tryphosa nana
- lateral view 1

Tryphosid amphipod
Tryphosa nana
- lateral view 2

Tryphosid amphipod
Tryphosa nana
- lateral view anterior 1

Tryphosid amphipod
Tryphosa nana
- lateral view posterior 1

Tryphosid amphipod
Tryphosa nana
- with 0.1mm division rule 1

Tryphosid amphipod
Tryphosa nana
- juveniles floating on surface of water in container 1

Tryphosid amphipod
Tryphosa nana
- floating on surface of water 1

Tryphosid amphipod
Tryphosa nana
- floating on surface of water 2

Tryphosid amphipod
Tryphosa nana
- inside Carcinus maenas, Shore crab carapace 1

Tryphosid amphipod
Tryphosa nana
- on internal skeleton of Carcinus maenas, Shore crab 1

Tryphosid amphipod
Tryphosa nana
- Carcinus maenas, Shore crab, carcass 1

Tryphosid amphipod
Tryphosa nana
- habitat / location 1

Hundreds of specimens were found on taking the carapace off a medium sized, dead Shore crab, Carcinus maenas. The crab was found in the shallow sublittoral approx. one meter below the low water mark, on sand, in front of Penzance Promende, Penzance, Cornwall, 22.07.20. SW47072960.

Finding numerous specimens inside a crab carcass is very typical for this species, this species can also be found in Echinocardium, Sea Potato tests and it may rob bait from lobster pots. Care must be taken with the identification of Tryphosa nana as Tryphosa crenata (Chevreux & Fage, 1925) is a very similar species. Tryphosa nana is also supported by data from CEFAS, from grab samples taken in Mounts Bay in 2012, Tryphosa crenata being absent.

Ref: The Tryphosa group (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae) by N. Kilgallen and J. Lowry February 2014.

Tryphosa nana (Krøyer, 1846) syn. Orchomenella nana (Krøyer, 1846) and Orchomene nana (Krøyer, 1846). Ref: WoRMS.

Thanks go to Ton Van Haaren for assistance provided.

Tryphosa nana syn Orchomenella nana and Orchomene nana tryphosidae tryphosid amphipod images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.