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

Holmsella pachyderma (Reinsch) Sturch, 1926 - A red algal parasite of Gracilaria and Gracilariopsis

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Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 1

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 2

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 3

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 4

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 5

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 6

Parasitic red algae
Holmsella pachyderma
- with 0.1mm division rule 1

Parasitic red algae
Holmsella pachyderma
- lateral cross section 1

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 7

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 8

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 9

Parasitic red algae
Holmsella pachyderma
- on Gracilaria gracilis 10

Parasitic red algae
Holmsella pachyderma
- Gracilaria gracilis in-situ 1

This small, pale, whitish algae is a red algal species that is parasitic on Gracilaria gracilis, Slender Wart Weed and Gracilariopsis longissima.

Species found on the algae Gracilaria gracilis, Slender Wart Weed, on the lowershore at Great Hogus, Marazion, Cornwall. 02.10.16.

Parasitic red algae
Holmsella pachyderma
- in cross section 1

Parasitic red algae
Holmsella pachyderma
- with 0.01mm division rule 1

Parasitic red algae
Holmsella pachyderma
- outer edge of thallus 1

Parasitic red algae
Holmsella pachyderma
- outer edge of thallus 2

Parasitic red algae
Holmsella pachyderma
- tetraspores 1

Parasitic red algae
Holmsella pachyderma
- tetraspores 2

This parasitic red alga was found among plants of a fairly large colony of Gracilariopsis longissima, Long Wart Weed, west of Lariggan Rocks, Penzance, Cornwall. 31.08.18.

AlgaeBase is a database of information on algae that includes terrestrial, marine and freshwater organisms.

Holmsella pachyderma red algal parasite of Gracilaria gracilis and Gracilariopsis longissima Wart Weed Seaweed 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.