Papers by Roberta D'Archino
New Zealand Journal of Marine and Freshwater Research, 2013
The foliose red alga Schizymenia apoda (Schizymeniaceae) is reported for the first time in New Ze... more The foliose red alga Schizymenia apoda (Schizymeniaceae) is reported for the first time in New Zealand waters. Its identity was confirmed by rbcL sequence data and morphological observations. This alga has been reported from both the Atlantic and the North Pacific and, although it is very variable in colour and habit, it is easily distinguished morphologically by the presence of refractive gland cells (visible in surface view), large cystocarps with a pronounced ostiole, and the lack of tetrasporophyte blades. Although not reported as an introduced species elsewhere, in New Zealand S. apoda was collected at the ferry terminal and on pontoons and pilings in the marinas of Wellington Harbour. It was also discovered in Otago Harbour. The examination of herbarium specimens and recent collections from areas outside the harbour has resulted in only a few samples that could be referred to this species, leading us to consider this a new introduction.
Phycological Research, 2013
The genus Dudresnaya is reported for the first time in New Zealand waters. Samples were collected... more The genus Dudresnaya is reported for the first time in New Zealand waters. Samples were collected in Bay of Islands, northern New Zealand, on rhodolith beds and at the edge of a rocky reef, between-5 and-10 m depth. The species was identified by morphological and anatomical characters as Dudresnaya capricornica and its identity was confirmed by molecular sequence data. This species is characterized by terete radial branches, outer cortical cells cylindrical, presence of hexagonal crystals, lack of annulation and mucilage coat on auxiliary cell branches, oblique division of carpogonium and cystocarps no cleft. The rbcL phylogenetic analysis showed the genus Dudresnaya is strongly supported and sister to taxa in the family Dumontiaceae. This family is also closely related to the families Rhizophillidaceae and Kallymeniaceae. This is the first record of the family Dumontiaceae in New Zealand.
New Zealand Journal of Marine and Freshwater Research, 2006
ABSTRACT The brown alga Asperococcus ensiformis is recorded from New Zealand waters for the first... more ABSTRACT The brown alga Asperococcus ensiformis is recorded from New Zealand waters for the first time. This species is regarded as an introduced species as is the closely related species A. bullosus, which was first reported to occur in New Zealand in 1957. Although A. ensiformis appears to be flattened and ribbon‐like when examined in transverse section it can be seen to be hollow at the margins. It can be distinguished from similar native species and from A. bullosus by a combination of anatomical and morphological characters.
ABSTRACT Molecular sequence analyses have shown that Kallymenia berggrenii, a species endemic to ... more ABSTRACT Molecular sequence analyses have shown that Kallymenia berggrenii, a species endemic to New Zealand, is more closely related to other taxa in the family Kallymeniaccae than to the type species and other members of the genus Kallymenia. a. A new genus, Psaromenia, is described based on morphological, anatomical and life history observations. Previously regarded as a species with a northern New Zealand distribution, the occurrence of this species in Fiordland, Southwestern South Island, is established. Analyses or rbeL data show that Psaromenia berggrenii belongs to a strongly Supported clade to which Meredithia microphylla also belongs. A heteromorphic life history in Psaromenia is Postulated based on the absence of mature thalli bearing tetrasporangia and the development of crusts from germinating carpospores.
The red alga Grateloupia turuturu is recorded from New Zealand waters for the first time. This sp... more The red alga Grateloupia turuturu is recorded from New Zealand waters for the first time. This species, native to Japan, is considered to be invasive in western europe, North America, and Tasmania. The occurrence of G. turuturu is confirmed by molecular analysis of chloroplastencoded rbcl and mitochondrial cox2-3 spacer sequences as well as the vegetative and reproductive anatomy of both tetrasporophyte and gametophyte specimens.
Uploads
Papers by Roberta D'Archino