Champia harveyana D.L.Ballantine & C.Lozada-Troche 2008
Publication Details
Champia harveyana D.L.Ballantine & C.Lozada-Troche 2008: 391, 392, figs 11-26
Published in: Ballantine, D.L. & Lozada-Troche, C. (2008). Champia harveyana sp. nov. (Champiaceae, Rhodophyta) from Puerto Rico, Caribbean Sea. Botanica Marina 51: 388-398.
Type Species
The type species (holotype) of the genus Champia is Champia lumbricalis (Linnaeus) Desvaux.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Punta Brea, Guanica, Puerto Rico; (Ballantine & Lozada-Troche 2008: 392) Holotype: D.L. Ballantine & H. Ruíz (D.L.B. 6224); 30 June 2004; 17 m depth; US; Alg. Coll. 209209 (Ballantine & Lozada-Troche 2008: 392)
General Environment
This is a marine species.
Description
Plants 8-15 cm tall with 2-6 axes arising from a holdfast. Branches (several at most) originating from the base may be decumbent and attached to the substratum by producing holdfasts along the branch axes, further anchoring the alga. Entire plants are highly bushy and often densely branched. Erect axes measure 1.8-2.5 mm in diameter in the lower third of plant and decrease in diameter to 1.2-1.6 mm distally. Segments are terete, slightly constricted at septal areas above, and barely constricted below. They range (between the diaphragms) from 1.6-2.1 mm long below to 1.1–1.7 mm long above. A thick mucilage layer (to 30 µm thick) covers all branches. Axes possess rounded apices with a central cluster of 20-24 apical cells. These give rise to longitudinal filaments, 5-10 µm in diameter, positioned and mostly limited to the inner periphery. Pyriform gland cells up to 12.5 -15.0 µm are cut off inwardly from the longitudinal filaments. The longitudinal filaments are attached by small cells immediately adjacent to the cortical cells or are separated from the cortical cells by small specialized cells that support the longitudinal filaments away from the cortical wall. Multiple parallel longitudinal filaments separated by these specialized cells are also commonly observed. Longitudinal medullary cells less commonly traverse the cavities passing through the outer third of diaphragms (not associated with cortical walls). The cortex is comprised of a single layer of cells that measure 30-55 µm broad by 40-85 µm long. Small darkly staining cortical cells are 10-15 µm in diameter, and irregularly but abundantly located between the large cortical cells. These cut off hair cells which may be extremely abundant. Transverse septa or diaphragms are one cell layer in thickness and are comprised of colorless cells up to 85 µm long and to 45 µm in thickness. Branching is initiated exclusively from the region of the nodal septa, with a single lateral branch or as many as five whorled branches cut off by an individual segment. Branching is irregular to opposite or verticillate. Proximally, walls of the axes become thickened by a proliferation of secondarily produced internal medullary filaments. These filaments also grow across both sides of nodal septa. In the regions of the nodes, the walls become substantially thickened by a proliferation of cells cut off peripheral to the original cortical layer. Cystocarps are highly conspicuous and are produced in the upper third of individuals. They are conical to truncated-conical in shape and possess a small ostiole. Cystocarps measure 750 to 950 µm across at the base and 1000 to 1300 µm in height. The carposporophyte arises from a basal fusion cell bearing branched gonimoblasts that give rise to carposporangia terminally. Sections through cystocarps reveal a well developed “tela-arachnoidea”. Carposporangia are a variety of shapes from rectangular to triangular and measure to 80 µm wide x 130 µm in length. Spermatangia were observed only on two restricted areas of a single specimen. They are borne in discrete clusters arising on the outer surfaces of cortical cell. Tetrasporangia appear to arise as a division product of a cortical cell, resulting in a basal cell and an inwardly projecting tetrasporangia. The tetrasporangia are obovate in shape, tetrahedrally divided and measuring to 70 µm in diameter by 90 µm in length.
Created: 03 December 2009 by M.D. Guiry.
Last updated: 01 May 2017
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=135965
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 01 May 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 April 2024
