Protokuetzingia Falkenberg, 1897

Holotype species: Protokuetzingia australasica (Montagne) Falkenberg

Original publication and holotype designation: Schmitz, F. & Falkenberg, P. (1897). Rhodomelaceae. In: Die natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten insbesondere den Nutzpflanzen unter Mitwirkung zahlreicher hervorragender Fachgelehrten, Teil 1, Abteilung 2. (Engler, A. & Prantl, K. Eds), pp. 421-480. Leipzig: verlag von Wilhelm Engelmann.

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Description: Thalli upright, to 20 cm high, dorsiventral, corticated polysiphonous, often regularly, distichously branched. Axes cylindrical to slightly compressed, regularly oppositely or irregularly alternately branched, but with regularly spaced opposite short, determinate branchlets; apices circinate, curved adaxially on branchlets; 2 branchlets endogenously developing from each central cell forming a microscopic vein in the thallus; branchlets developing singly or in clusters at ends of some veins. Type species with 6 pericentral cells, P. schottii with 5. Trichoblasts rarely found on vegetative branches, commonly produced on dorsal side of fertile branchlets. Reproductive structures on determinate branchlets. Tetrasporangial stichidia developing in place of branchlets; tetrasporangia on 2 adaxial pericentrals forming 2 rows of sporangia mostly in proximal part of stichidia; stichidia sometimes branching. Polysporangia formed in P. schottii. Spermatangial capitula formed in place of trichoblasts, subcylindrical. Procarps on dorsal side of branchlet replacing trichoblasts, cystocarps spheroid, sessile and several on branchlet.

Information contributed by: R.E. Norris. The most recent alteration to this page was made on 2010-10-07 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Comments: Type species from southern and western Australia; P. schottii from the Caribbean and Brazil. Differing from Kuetzingia mainly in not producing alae and in having determinate sterile lateral branchlets, this is the only genus in the Amansieae having a variable number of pericentral cells. Taylor (1941) discusses his reason for combining P. schottii, with 5 pericentrals, with P. australasica, in which there are 6.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=42519

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 March 2024

 
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