Hutchinsia pennata C.Agardh 1824

Current name: Xiphosiphonia pennata (C.Agardh) Savoie & G.W.Saunders
microscope, Malmousque, Marseille, France, 2011Ignacio Bárbara (barbara@udc.es)

Publication Details
Hutchinsia pennata C.Agardh 1824: 146

Published in: Agardh, C.A. (1824). Systema algarum. pp. [i]-xxxvii, [1]-312. Lundae [Lund]: Literis Berlingianis [Berling].

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Publication date: probably September 1824

Type Species
A type species for this genus does not appear to have been designated.

Status of Name
This name is currently regarded as a synonym of Xiphosiphonia pennata (C.Agardh) Savoie & G.W.Saunders.

Source of Synonymy
Savoie, A.M. & Saunders, G.W. (2016). A molecular phylogenetic and DNA barcode assessment of the tribe Pterosiphonieae (Ceramiales, Rhodophyta) emphasizing the Northeast Pacific. Botany 94: 917-939, 8 figs.

Type Information
Syntype localities: "In mari Mediterraneo. — In mari Atlantica ad Gades." [Mediterranean, Atlantic at Cadíz]; (Agardh 1824: 124) Lectotype: LD; Herb. Alg. Agardh 39271 (Womersley 2003: 340) Notes: Lectotype selected from Mediterranean?

Origin of Species Name
Adjective (Latin), pinnate (Stearn 1983).

General Environment
This is a marine species.

Created: 19 November 1998 by M.D. Guiry.

Last updated: 08 October 2016

Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Nomenclatural notes
Agardh included in synonymy "Conf. mollis, Drap. and Ceram. pennatum, Roth"; there are two binomials with the name Ceramium pennatum attributable to Roth but this citation seemingly refers to Conferva pennatum Roth, 1800, nom. illeg. Conferva mollis Draparnaud, a manuscript name [INA], was included in the synonymy of Ceramium pennatum Roth by Roth (1806: 133). Hutchinsia pennata is thus treated as a new name. Silva, Basson & Moe (1996: 549) write: "Pterosiphonia pennata is traditionally attributed to (Roth) Falkenberg (1901: 263). Ceramium pennatum Roth, the intended basionym, is in fact a purification of C. pennatum (Hudson) Roth (1800b: 171) (Conferva pennata Hudson, 1762: 486; syntype localities: England: between Margate and Dover, Kent; Walney Island, Lancashire). Roth, having decided that he did not have Hudson's C. pennata in hand, redescribed his material without proposing a new name. Consequently, in accordance with Art. 48, C. pennatum Roth 1806 is treated as a new species. Since its name is a later homonym and not priorable, Hutchinsia pennata C. Agardh is treated as a nomen novum in accordance with Art. 58.3. Conferva pennata Hudson is traditionally assigned to the Sphacelariales, but Prud'homme van Reine (1982: 242) rejected it as a name of uncertain application." - (08 October 2016) - M.D. Guiry
Savoie & Saunders (2016: 926) note "There appears to be more than one genetic species group currently attributed to P. pennata in Spain. Díaz-Tapia and Bárbara (2013) collected two genetic groups from the Iberian Peninsula in Spain that they identified as P. pennata.... A comprehensive molecular and morphological study is needed for this species complex." In order to resolve this, it will be necessary to establish if the type is in herb. Agardh or in herb. Roth since Hutchinsia pennata C.Agardh is effectively a new name for Ceramium pennatum Roth, nom. illeg. - (08 October 2016) - M.D. Guiry

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 October 2016. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 06 April 2025