Heydrichia homalopasta sp. nov. (Sporolithaceae, Rhodophyta) from Australia

Townsend, Roberta A.; Borowitzka, Michael A.

doi:10.1515/bot.2001.031

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…Table 1 records the differences and similarities between the species. Heydrichia cerasina is anatomically similar to the Australian Heydrichia homalopasta (see Townsend & Borowitzka 2001;Harvey et al 2002) and while morphology and substrata preference are known to be very plastic characters, the characteristically warty growth form and habitat preference of the new species for small pebbles, distinguishes Heydrichia cerasina from Heydrichia homalopasta. Furthermore, Townsend et al diagnostic characters separating South African species of Heydrichia (only on the floor, but not seen in Heydrichia groeneri) from those of Sporolithon (on the floor, walls, and roof, see also Verheij 1993;Townsend et al 1994 Similarly, while not presently regarded as diagnostic features, gametangial conceptacle placement and carposporangial conceptacle development appear unique in Heydrichia cerasina.…”

Section: Discussionmentioning

confidence: 96%

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Heydrichia cerasina sp. nov. (Sporolithales, Corallinophycidae, Rhodophyta) from the southernmost tip of Africa

Maneveldt

Merwe

2012

Phycologia

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A new species of Heydrichia (Sporolithales), Heydrichia cerasina sp. nov., is described, found only on pebbles in the low intertidal zone along a 10 km stretch of the South African south coast from Cape Agulhas to Struisbaai. The species is characterized by the following suite of features that distinguish it from the other two species of Heydrichia found in South Africa: (1) unusual cherry-red colour when freshly collected; (2) uniformly warty growth form; (3) relatively thin crust (up to 1400 mm thick); (4) tetra/bisporangial sori comprised of mostly single sporangial chambers; and (5) unbranched spermatangial structures distributed on the floor, walls, and roof of the mature male conceptacle. The species appears to be most closely related to Heydrichia homalopasta from Australia. This study has affirmed that the distribution of spermatangial structures within male chambers is a feature that cannot be used to separate Heydrichia from Sporolithon, the only other genus in Sporolithales, although features of thallus construction and tetra/bisporangia continue to distinguish the genera. A key to the southern African species from the order Sporolithales is provided.

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Section: Discussionmentioning

confidence: 96%

“…Comparison of the four species of Heydrichia based on selected characters(after Townsend et al 1994;Keats & Chamberlain 1995;Townsend & Borowitzka 2001;Harvey et al 2002; this article). ND 5 no data.…”

mentioning

confidence: 99%

Heydrichia cerasina sp. nov. (Sporolithales, Corallinophycidae, Rhodophyta) from the southernmost tip of Africa

Maneveldt

Merwe

2012

Phycologia

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“…9 However, possible intervening fossil links between mid-Silurian craticulaceans and Early Cretaceous sporolithaceans are suggested by BROOKE & RIDING (1998, p. 192-193). The fourth non-fossil species, H. homalopasta is based on a type from temperate eastern Australia (TOWNSEND & BOROWITZKA, 2001;HAR-VEY et al, 2002), and it and H. woelkerlingii also have been recorded from temperate New Zealand (HARVEY et al, 2005;FARR et al, 2009;NELSON, 2012). H. homalopasta also is documented from the Chatham Islands (44°00'S, 176°30'W) (HARVEY et al, 2005;FARR et al, 2009) to the east of mainland New Zealand, raising the possibility that it may also occur further towards the west coast of South America.…”

Section: Referredmentioning

confidence: 99%

Heydrichia (?) poignantii, sp. nov. (Sporolithaceae, Sporolithales, Rhodophyta), a 100 million year old fossil coralline red alga from north-eastern Brazil, and a new Hauterivian record of Sporolithon from Switzerland

Woelkerling¹,

Granier²,

Dias-Brito³

2014

Carnets Geol.

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A detailed morphological-anatomical account of the species is provided, and its placement in Heydrichia is discussed in relation to current classification proposals. Comparisons with the four other known species of the genus, all non-fossil, show that H. poignantii is the only known species of Heydrichia in which thalli are encrusting to sparsely warty to horizontally layered with overlapping lamellate branches that commonly appear variously curved or arched, and in which thalli have sporangial complexes that become buried in the thallus. The evolutionary history of Heydrichia remains uncertain, but available data suggest that the genus may have diverged from the sporolithacean genus Sporolithon, known as early as Hauterivian times (c. 129.4-132.9 ± 1 Ma) from Spain (and newly reported here from Switzerland), or it may have arisen from a graticulacean alga such as Graticula, dating from mid-Silurian times . Current data also suggest that Heydrichia is more likely to have arrived in Brazil from Central Atlantic waters than from higher latitude South Atlantic waters. This implies that currently living species in southern Africa probably arose later from ancestors further equatorward in the South Atlantic, although confirming studies are needed. All non-fossil species of Heydrichia are known only from the southern hemisphere.Key Words: Heydrichia; Sporolithaceae; Sporolithon; fossil coralline red algae; Brazil; Switzerland; Hauterivian; Albian; Cenomanian. (Sporolithaceae, Sporolithales, Rhodophyta), représen-tant le enregistrement fossilifère confirmé du genre, ont été découverts en lames minces dans des calcaires albiens de la Formation de Riachuelo, Bassin de Sergipe, et dans des calcaires d'âge AlbienCénomanien de la Formation de Ponta do Mel, Bassin de Potiguar, au NE du Brésil. Les caractéristiques morphologiques et anatomiques de cette espèce sont détaillées et son attribution au genre Heydrichia est débattue en tenant compte des propositions de la classification actuelle. Des comparaisons avec les quatre autres espèces recencées du genre, toutes inconnues à l'état fossile, montre que H. poignantii est la seule espèce connue du genre Heydrichia dans laquelle les thalles sont encroûtants à modéré-ment verruqueux, à horizontalement stratifiés avec recouvrements de leurs excroissances lamellaires qui, fréquemment, paraissent diversement arquées ou cintrées et dans laquelle les compartiments sporangiques qui s'enfouissent dans ce thalle. L'histoire évolutive de Heydrichia demeure incertaine, mais les données disponibles suggèrent que le genre pourrait s'être différencié à partir du genre Sporolithon de la Famille des Sporolithacées, connu déjà dans l'Hauterivien (c. 129.4-132.9 ± 1 Ma) d'Espagne (et nouvellement découvert en Suisse, comme nous le rapportons dans cette publication), mais il pourrait tout aussi bien être issu d'une algue de la Famille des Graticulacées, telle que Graticula, trouvée dans des séries d'âge Silurien moyen (aux environs de -427 à -435 Ma). Les éléments en notre possession suggèrent éga...

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“…1994;Athanasiadis 1996;Millar et al . 1996;Townsend & Borowitzka 2001;Harvey et al . 2002), and a detailed floristic account of the green macroalgae of Lord Howe Island (Kraft 2000), which included 11 new species, has been completed.…”

Section: Introductionmentioning

confidence: 99%

New records of marine benthic algae from New South Wales, eastern Australia

Millar¹

2004

Phycological Res

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Twenty-four species of marine macroalgae are recorded from the mainland coast of New South Wales for the first time. One species, Laurencia platyclada Boergesen, represents a new record for Australia and the Pacific Ocean. Included in these new records is the introduced, invasive and cold-tolerant strain of the green alga Caulerpa taxifolia , which was formerly known only as native, non-invasive populations from Lord Howe Island. Based on published accounts, the composition of the marine benthic algae for the state of New South Wales now stands at 131 green, 140 brown and 449 red macroalgae. This baseline information adds significantly to our knowledge of the overall marine biodiversity of the state, as well as to the phycogeography of the southwestern Pacific region.

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Heydrichia homalopasta sp. nov. (Sporolithaceae, Rhodophyta) from Australia

Cited by 8 publications

References 25 publications

Heydrichia cerasina sp. nov. (Sporolithales, Corallinophycidae, Rhodophyta) from the southernmost tip of Africa

Heydrichia cerasina sp. nov. (Sporolithales, Corallinophycidae, Rhodophyta) from the southernmost tip of Africa

Heydrichia (?) poignantii, sp. nov. (Sporolithaceae, Sporolithales, Rhodophyta), a 100 million year old fossil coralline red alga from north-eastern Brazil, and a new Hauterivian record of Sporolithon from Switzerland

New records of marine benthic algae from New South Wales, eastern Australia

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