DICROGLOSSUM CRISPATULUM GEN ET COMB-NOV FROM WESTERN-AUSTRALIA, REPRESENTING A NEW TRIBE WITHIN THE DELESSERIACEAE (RHODOPHYTA)

Citation
Ajk. Millar et Jm. Huisman, DICROGLOSSUM CRISPATULUM GEN ET COMB-NOV FROM WESTERN-AUSTRALIA, REPRESENTING A NEW TRIBE WITHIN THE DELESSERIACEAE (RHODOPHYTA), Journal of phycology, 32(1), 1996, pp. 127-137
Citations number
46
Categorie Soggetti
Plant Sciences","Marine & Freshwater Biology
Journal title
ISSN journal
00223646
Volume
32
Issue
1
Year of publication
1996
Pages
127 - 137
Database
ISI
SICI code
0022-3646(1996)32:1<127:DCGECF>2.0.ZU;2-1
Abstract
Dicroglossum gen. nov. (Delesseriaceae, Ceramiales) is a monotypic gen us based on Delesseria crispatula, a species originally described by H arvey for plants collected from southwestern Western Australia. Distin ctive features of the new genus include exogenous indeterminate branch es; growth by means of a single transversely dividing, apical cell; ab sence of intercalary divisions In the primary, secondary, and tertiary cell rows; lateral pericentral cells not transversely divided; not al l cells of the secondary cell rows producing tertiary cells rows; all tertiary initials reaching the thallus margin; midrib present but late ral nerves absent; determinate lateral bladelets arising endogenously; blades monostromatic, except at the midrib, carpogonial branches rest ricted to primary cell rows, on both surfaces of unmodified blades; pr ocarps produced on both blade surfaces, each procarp consisting of a s upporting cell that bears two four-celled carpogonial branches and one sterile-cell group of three to four cells; and tetrasporangia borne i n two layers, separated by a central row of sterile cells. The combina tion of exogenous indeterminate branching and bicarpogonial procarps i s considered to warrant the recognition of a new tribe, the Dicrogloss eae, within the subfamily Delesserioideae.