Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton 1991

Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton

Current name: Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton
Spiddal, Co. Galway, Ireland; on Patella vulgata - 30 September 2007. Michael Guiry (

Publication Details
Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton 1991: 303

Published in: Jackelman, J.J., Stegenga, H.S. & Bolton, J.J. (1991). The marine benthic flora of the Cape Hangklip area and its phytogeographical affinities. South African Journal of Botany 57: 295-304, 4 figs, 1 table.

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Type Species
The type species (lectotype) of the genus Colaconema is Colaconema bonnemaisoniae Batters.

Status of Name
This name is of an entity that is currently accepted taxonomically.

Callithamnion caespitosum J.Agardh

Type Information
Type locality: Brest; (Athanasiadis 1996: 26) Lectotype: LD; Agardh No. 18011 (Womersley 1994: 56)

Origin of Species Name
Adjective (Latin), growing in patches or tufts, caespitose (Stearn 1983).

General Environment
This is a marine species.

Forming dense, brownish-red tassel-like tufts of sparingly branched erect, uniseriate hair-like filaments. Cells oblong, 3-4 times as long as broad. Several plastids, each with a pyrenoid, against cell wall. Reproducing by monosporangia, all year around. Tetrasporangia occasionally formed in winter.

On limpets (Patella spp.) on exposed shores and epiphytic on Codium fragile in the lower intertidal of exposed and semi-exposed coasts. Commoner on western and south-western coasts than records indicate.

Key Characteristics
Association with limpets and Codium; tasellated growth form of tufts. Abundant and large monosporangia.

Similar Species
Rhodochorton purpureum and Rhodothamniella floridula which are generally turf-forming and do not form monosporangia.

Created: 30 December 1998 by M.D. Guiry.

Last updated: 29 May 2021

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 29 May 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 27 May 2024

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