Gymnogongrus griffithsiae

Gymnogongrus griffithsiae
Scientific classification
(unranked):	Archaeplastida
Division:	Rhodophyta
Class:	Florideophyceae
Order:	Gigartinales
Family:	Phyllophoraceae
Genus:	Gymnogongrus
Species:	G. griffithsiae
Binomial name
	Gymnogongrus griffithsiae; (Turner) C.Martius

Gymnogongrus griffithsiae is a small uncommon seaweed.

Description

This small alga grows to 5 cm long from a small disc. The fronds are erect, stiff and branch dichotomously in 1 plane, the tips a little flattened. In colour it is dark purplish brown. The structure is multiaxial with elongated cells surrounded cortical cells.[1][2]

Reproduction

Male spermatangia are unknown.[2][3] Carpotetasporangial outgrowths, that is sporangia containing four spores,[4] by a carposporophyte outgrowth which develops during the year.[2]

Distribution

Found in Great Britain and Ireland with a southern range, as far north as Lough Swilly. In the north Atlantic in the Azores in Europe to Massachusetts to Virginia in North America.[5][6]

Habitat

The plants grow in rock pools of the lower littoral and in the upper sublittoral.[2]

Possible confusion

This species is similar to Ahnfeltia plicata which usually has wiry irregular branching.[2]

References

Bunker, F.StP, D., Brodie, J.A.Brodie, Maggs, C.A. and Bunker, A.R. 2017. Seaweeds of Britain and Ireland Second edition Wild Nature Press, Plymouth, UK. ISBN 978-0-9955673-3-7
Dixon, P.S. and Irvine, L.M. 1977. Seaweeds of the British Isles Volume 1 Rhodophyta Part 1 Introduction, Nemaliales, Gigartinales. British Museum (Natural History) ISBN 0 565 00781 5
Fritsch, F.E. 1965 The Structure and Reproduction of Algae Volume 11 Cambridge University Press
Irvine, L.M.1983 Seaweeds of the British Isles Volume 1 Rhodophyta.p.99.British Museum (Natural History) ISBN 0-565-00871-4
Morton, O. 1994 Marine Algae of Northern Ireland. Ulster Museum ISBN 0900761288
Morton, O. 2003. The marine macroalgae of County Donegal, Ireland. Bulletin of Irish biogeographical Society. No. 27

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[Bunker-1] Bunker, F.StP, D., Brodie, J.A.Brodie, Maggs, C.A. and Bunker, A.R. 2017. Seaweeds of Britain and Ireland Second edition Wild Nature Press, Plymouth, UK. ISBN 978-0-9955673-3-7

[Dixon-2] Dixon, P.S. and Irvine, L.M. 1977. Seaweeds of the British Isles Volume 1 Rhodophyta Part 1 Introduction, Nemaliales, Gigartinales. British Museum (Natural History) ISBN 0 565 00781 5

[3] Fritsch, F.E. 1965 The Structure and Reproduction of Algae Volume 11 Cambridge University Press

[4] Irvine, L.M.1983 Seaweeds of the British Isles Volume 1 Rhodophyta.p.99.British Museum (Natural History) ISBN 0-565-00871-4

[5] Morton, O. 1994 Marine Algae of Northern Ireland. Ulster Museum ISBN 0900761288

[6] Morton, O. 2003. The marine macroalgae of County Donegal, Ireland. Bulletin of Irish biogeographical Society. No. 27