Eucheumatopsis sanibelensis sp. nov. from the Gulf coast of Florida, USA

Based upon COI-5P, LSU rDNA and rbcL sequence data, as well as its morphological characteristics, a new red algal species, Eucheumatopsis sanibelensis E.S.Peterson, C.W.Schneider et G.W.Saunders sp. nov., was discovered on the Gulf coast of Florida, USA and shown to be distinct from the generitype E. isiformis with a type locality in the eastern Caribbean Sea. The new more attenuate taxon from Sanibel Island represents only the second species in this newly described genus, a genus recently segregated from Eucheuma based upon significant molecular and morphological differences. The two species have overlapping geographic distributions in the eastern Gulf of Mexico, but thus far E. sanibelensis is only known from a single location.

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Taxonomic Transfer of the Red Algal Genus Gloiosaccion to Chrysymenia (Rhodymeniaceae, Rhodymeniales), Including the Description of a New Species, Chrysymenia pseudoventricosa, for the Gulf of Mexico

Phytotaxa ◽

10.11646/phytotaxa.243.1.2 ◽

2016 ◽

Vol 243 (1) ◽

pp. 54 ◽

Cited By ~ 7

Author(s):

William E Schmidt ◽

Carlos Frederico D. Gurgel ◽

Suzanne L. Fredericq

Keyword(s):

Phylogenetic Analysis ◽

New Species ◽

Gulf Of Mexico ◽

Caribbean Sea ◽

Distinct Species ◽

Lsu Rdna ◽

Rdna Sequences ◽

Red Algal ◽

Algal Genus ◽

A New Species

Gloiosaccion Harvey, with type G. brownii (Rhodymeniaceae, Rhodymeniales), is a red algal genus characterized by the presence of large, hollow and saccate vesicle-shaped thalli arising from small solid axes. Whereas Gloiosaccion has traditionally been viewed as being closely related to Botryocladia (Agardh) Kylin, a multi-marker phylogenetic analysis based on chloroplast-encoded rbcL and UPA and nuclear LSU rDNA sequences instead places Gloiosaccion brownii and G. pumila in the Chrysymenia clade that includes the generitype C. ventricosa (Lamouroux) J. Agardh. Gloiosaccion is reduced to synonymy with Chrysymenia J. Agardh, a taxonomic move first advocated by De Toni in 1900. In addition to C. brownii (Harvey) De Toni, “Gloiosaccion” brownii var. firmum Harvey and “G.” pumilum J. Agardh are recognized as the distinct species Chrysymenia coriacea comb. et stat. nov. and C. pumila (J. Agardh) Weber-van Bosse, respectively. A new species, C. pseudoventricosa sp. nov. is proposed to accommodate specimens going under the name C. ventricosa (J.V. Lamouroux) J. Agardh from the Gulf of Mexico and Caribbean Sea.

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Molecular and morphological evidence indicates that Pseudorhabdosynochus lantauensis (Monogenea: Diplectanidae) represents two species

Parasitology ◽

10.1017/s0031182004007152 ◽

2005 ◽

Vol 130 (6) ◽

pp. 669-677 ◽

Cited By ~ 25

Author(s):

X. Y. WU ◽

N. B. CHILTON ◽

X. Q. ZHU ◽

M. Q. XIE ◽

A. X. LI

Keyword(s):

Sequence Data ◽

Phylogenetic Analyses ◽

Large Subunit ◽

Strong Support ◽

Morphological Characteristics ◽

Sufficient Evidence ◽

Bootstrap Support ◽

Morphological Evidence ◽

Lsu Rdna ◽

Epinephelus Coioides

Sequences of the first internal transcribed spacer (ITS-1) and the D1-D3 domains of the large subunit (LSU) of the ribosomal DNA (rDNA) were determined for multiple specimens of 4 operational taxonomic units (OTUs) of the monogenean, Pseudorhabdosynochus lantauensis. OTUs were defined based on their collecting localities, host and/or morphological characteristics. All P. lantauensis specimens of one group (OTUs 1 and 3) differed in their sequences of the ITS-1 and partial LSU rDNA when compared with specimens of a second group (OTUs 2 and 4) by 12% and 2%, respectively. Results of the phylogenetic analyses of the LSU rDNA sequence data showed total (100%) bootstrap support for the separation of P. lantauensis into 2 distinct clades. At least 11 of the 18 nucleotide differences in the LSU sequence between the two P. lantauensis clades were derived (i.e. autapomorphic) characters when the morphologically distinct species, P. epinepheli and P. coioidesis, were used as outgroups. Furthermore, there were several autapomorphic character states for each P. lantauensis clade. This provides sufficient evidence to reject the null hypothesis that P. lantauensis represents a single species. Morphological and morphometric differences between these two clades provided additional strong support for the separation of P. lantauensis into two species. These two parasite species were found to co-exist on one of the two species of serranid fish (i.e. Epinephelus coioides) examined in the South China Sea (Guangdong Province, China).

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Sheathia jinchengensis (Batrachospermales, Rhodophyta), a new freshwater red algal species described from North China

Phytotaxa ◽

10.11646/phytotaxa.367.1.7 ◽

2018 ◽

Vol 367 (1) ◽

pp. 63 ◽

Cited By ~ 1

Author(s):

JIN-FEN HAN ◽

FANG-RU NAN ◽

JIA FENG ◽

JUN-PING LV ◽

QI LIU ◽

...

Keyword(s):

New Species ◽

North China ◽

Cold Water ◽

Sequence Data ◽

Algal Species ◽

Point Of View ◽

Shanxi Province ◽

Water Stream ◽

Red Algal ◽

Freshwater Red Algae

A new species of freshwater red algae, Sheathia jinchengensis, is described based on material collected from rocks in a clean and cold-water stream from the Jincheng region of Shanxi province in North China. Molecular sequences of rbcL and psbA genes were used to evaluate the phylogenetic relationship among samples of S. jinchengensis and other Sheathia species from several regions of the world. The results showed that S. jinchengensis formed an independent branch and separated from the previously published sequence data of other Sheathia taxa. From a morphological point of view, this new species differs also from other species of the genus by the smaller diameter of whorls (167.0–312.5 μm) and larger carpogonium diameter (17.0–29.0 μm). Comparison of sequence variation and thallus morphology with other Sheathia taxa resulted in the proposal of the new species—S. jinchengensis. Additionally, two endemic Batrachospermum species described earlier from China i.e., B. hongdongense and B. longipedicellata are now transferred to the genus Sheathia based on the present study as S. hongdongensis (S.L.Xie & J.Feng) Han, Nan, Feng, Lv, Liu, Kociolek et Xie comb. nov. and S. longipedicellata (Hua & Shi) Han, Nan, Feng, Lv, Liu, Kociolek et Xie comb. nov.

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Phylogenesis of pit-plug-associated features in the Rhodophyta: inferences from molecular systematic data

Canadian Journal of Botany ◽

10.1139/b97-858 ◽

1997 ◽

Vol 75 (9) ◽

pp. 1436-1447 ◽

Cited By ~ 35

Author(s):

Gary W. Saunders ◽

J. Craig Bailey

Keyword(s):

Ribosomal Rna ◽

Sequence Data ◽

Algal Species ◽

Small Subunit ◽

Future Research ◽

Molecular Systematic ◽

Rna Sequences ◽

Small Subunit Ribosomal Rna ◽

Cap Layer ◽

Red Algal

Small-subunit ribosomal RNA sequence data are presented for Rhodogorgon carriebowensis Norris et Bucher (Rhodogorgonales, Rhodophyta) and Galaxaura marginata (Ellis et Solander) Lamouroux (Nemaliales, Rhodophyta). Data for these species were included in a matrix consisting of small-subunit ribosomal RNA sequences for 70 taxonomically diverse red algal species. Distance, parsimony, and maximum-likelihood analyses of these data all strongly support (100% of bootstrap replicates for distance and parsimony) a close alliance between the Rhodogorgonales and Corallinales. Our alignment includes 19 species representing six florideophyte orders (Acrochaetiales, Batrachospermales, Corallinales, Nemaliales, Palmariales, Rhodogorgonales) in which pit plugs are characterized by two cap layers. Distance and parsimony analyses resolve a monophyletic lineage including all "two-cap-layer" species. Our parsimony-derived molecular phylogeny was used to test a published hypothesis of pit-plug evolution. Four aspects of Pueschel's hypothesis are consistent with the results of our molecular systematic study: (i) "naked" plugs represent the ancestral type, (ii) outer cap layers are homologous structures, (iii) domed outer caps are ancestral to plate-like outer caps, and (iv) cap membranes are a derived feature within the two-cap-layer lineage. Directions for future research are discussed. Key words: Acrochaetiales, Batrachospermales, Corallinales, molecular systematics, Nemaliales, Palmariales, phylogeny, pit plug, Rhodogorgonales, Rhodophyta.

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A new species of Odontozona Holthuis, 1946 (Crustacea: Decapoda: Stenopodidea: Stenopodidae) from the Caribbean Sea

Zootaxa ◽

10.11646/zootaxa.4276.3.5 ◽

2017 ◽

Vol 4276 (3) ◽

pp. 405

Author(s):

MARÍA M. CRIALES ◽

RAFAEL LEMAITRE

Keyword(s):

New Species ◽

Morphological Characteristics ◽

Caribbean Sea ◽

Reef Environment ◽

Western Atlantic ◽

Male Specimen ◽

Female Holotype ◽

Coral Reef Environment ◽

Morphological Differences ◽

Shallow Water Species

A new shallow-water species of the stenopodid shrimp genus Odontozona is described based on a specimen collected on a coral reef environment in the San Bernardo Islands, Caribbean coast of Colombia. Odontozona edyli n. sp. can be separated from all other congenerics by a combination of morphological characteristics, most notably the ornate abdomen with a distinct and complex pattern of spines, carinae and grooves, spination of the carapace, length of rostrum, armature of third cheliped, third maxilliped and telson. This new species is more similar to O. arbur and O. sculpticaudata from the Indo-Pacific than to any other species of Odontozona from the western Atlantic. An unreported male specimen of O. striata from Jamaica, Caribbean Sea revealed morphological differences with the female holotype described by Goy (1981), suggesting a possible sexual dimorphism or a high intra-specific variability as reported for some Indo-Pacific Odontozona species.

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Molecular taxonomic clarification of Ptilotus exaltatus and Ptilotus nobilis (Amaranthaceae)

Australian Systematic Botany ◽

10.1071/sb06010 ◽

2007 ◽

Vol 20 (1) ◽

pp. 72 ◽

Cited By ~ 8

Author(s):

Kok K. Lee ◽

Dion K. Harrison ◽

Margaret E. Johnston ◽

Richard R. Williams

Keyword(s):

Sequence Variation ◽

Sequence Data ◽

Morphological Characteristics ◽

Morphological Characters ◽

Nuclear Rdna ◽

Monophyletic Clade ◽

Morphological Taxonomy ◽

Molecular Phylogenetic ◽

Morphological Differences ◽

Respective Species

A complete botanical key for the genus Ptilotus R.Brown (family Amarathaceae) has not yet been published. Identifying the 100 or more Ptilotus species using morphological characters has been difficult because plants often exhibit slight morphological differences and intermediate characteristics common to several species, subspecies, varieties and forms. Ptilotus exaltatus Nees and P. nobilis (Lindl) F.Muell share many morphological characteristics, but are classified as different species predominantly based on inflorescence colour. The current study involved a molecular phylogenetic analysis of 14 Ptilotus species using sequence data from the internal transcribed spacer (ITS) regions ITS 1 and ITS 2 within the 18S–26S nuclear rDNA. Of the 39 accessions analysed, all except those identified as P. exaltatus and P. nobilis clustered according to their respective species based on their morphological taxonomy. In contrast, all 18 P. exaltatus and P. nobilis accessions formed a distinct monophyletic clade with 99% bootstrap values and a low level of sequence variation (GD = 0.002). Taking into account the lack of reliable morphological characters for separating P. exaltatus and P. nobilis, together with the ITS sequence data showing little genetic divergence or genetic structure, we propose that P. exaltatus and P. nobilis are conspecific.

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A new species of penzigioid Xylaria (Xylariaceae) from the cloud forest in eastern Mexico revealed through morphological and phylogenetic analyses

Botany ◽

10.1139/cjb-2019-0043 ◽

2019 ◽

Vol 97 (7) ◽

pp. 381-389

Author(s):

Santiago Chacón ◽

Dolores González

Keyword(s):

Sequence Data ◽

Novel Species ◽

Cloud Forest ◽

Phylogenetic Analyses ◽

Phylogenetic Reconstruction ◽

Morphological Characteristics ◽

Its Sequences ◽

Dna Sequence Data ◽

Morphological Differences ◽

Morphological Transformations

Xylaria subtropicalis, a species new to science, was collected from a montane cloud forest in eastern Mexico. It is described and illustrated, based on detailed macro- and microscopic morphological characteristics, habitat, and DNA sequence data. The distinctive morphological differences between X. subtropicalis and other Xylaria species include: the stromata being significantly erumpent, the size of the ascospores being 23–28 μm × 13–15 μm, and a straight germ slit as long as the spore. To determine whether this was a novel species, ITS sequences were generated and compared with 2478 sequences available for the genus from GenBank, using the software USEARCH. Additionally, a phylogenetic reconstruction was performed with Parsimony Ratchet, Maximum Likelihood, and Bayesian Inference, using 122 concatenated ITS sequences, and segments from the 28S rDNA and RPB2. Sequences of this novel species form a strongly supported lineage, clearly separated from other species of Xylaria. Phylogenetic relationships indicate that there have been numerous morphological transformations within the genus.

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Phenotypic variation in a significant spore character in Kudoa (Myxosporea: Multivalvulida) species infecting brain tissue

Parasitology ◽

10.1017/s0031182010000673 ◽

2010 ◽

Vol 137 (12) ◽

pp. 1759-1772 ◽

Cited By ~ 34

Author(s):

MIEKE A. A. BURGER ◽

ROBERT D. ADLARD

Keyword(s):

Brain Tissue ◽

Principal Components ◽

Sequence Data ◽

Ssu Rdna ◽

Lsu Rdna ◽

Pathogenic Species ◽

Regression Analyses ◽

Morphometric Data ◽

Rdna Sequence Data ◽

Morphological Differences

SUMMARYSome Kudoa species display variations in the number of polar capsules in spores within an individual pseudocyst. Nonetheless, there is usually a dominant morphotype which forms a significant element of diagnosis. In 2007, a Kudoa isolate from whiting (spores with 5 (dominant) or 6 (minor) polar capsules) was characterized by Burger et al. (2007) as being 100% identical in SSU rDNA to Kudoa yasunagai (spores with 7 polar capsules) from a halibut, despite its obvious morphological differences. The authors hypothesized that either SSU rDNA had reached its level of resolution or that the genetic identity revealed conspecificity. To further investigate these hypotheses, SSU and LSU rDNA sequence data were coupled with principal components, correlation, and regression analyses of morphometric data from different kudoid isolates that infect brain tissue to determine the relationships between spore morphotypes and different kudoid isolates. The trends in morphometrics between the spores of particular isolates were so similar that it was concluded that the molecular results did indicate conspecificity rather than SSU reaching its level of resolution. This phenotypic influence on a significant diagnostic character within the Kudoidae has a major impact on the diagnosis of this, and potentially other, pathogenic species.

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Sheathia matouensis (Batrachospermales, Rhodophyta), a new freshwater red algal species from North China

Phytotaxa ◽

10.11646/phytotaxa.415.5.1 ◽

2019 ◽

Vol 415 (5) ◽

pp. 255-263

Author(s):

JIN-FEN HAN ◽

FANG-RU NAN ◽

JIA FENG ◽

JUN-PING LV ◽

QI LIU ◽

...

Keyword(s):

Phylogenetic Analysis ◽

New Species ◽

Sequence Data ◽

Algal Species ◽

Molecular Data ◽

Point Of View ◽

Shanxi Province ◽

Morphological Observation ◽

Red Algal ◽

A New Species

A new species of freshwater red alga, Sheathia matouensis, is described and illustrated based on material collected in spring water from the Hongdong region of Shanxi province, China. Phylogenetic analysis of sequence data from the rbcL and psbA indicated the separation between S. matouensis and the other species of genus Sheathia. Additionally, from a morphological point of view, S. matouensis differs from other species of the genus Sheathia by the smaller whorls and carpogonium. Therefore, the results based on both morphological observation and molecular evidences facilitated the proposal of this new species - S. matouensis. It represents another species in the freshwater red algal diversity in China and the description of this new species provides more molecular data for phylogenetic analysis of genus Sheathia.

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The coexistence of cryptic algal species: Temporal and spatial distribution of filamentous members of the red algal order Bangiales in the Wellington region

10.26686/wgtn.17005666 ◽

2021 ◽

Author(s):

◽

Rebecca Ansell

Keyword(s):

Spatial Distribution ◽

New Zealand ◽

Algal Species ◽

Small Scale ◽

Molecular Tools ◽

Temporal And Spatial Distribution ◽

Culture Studies ◽

Single Location ◽

Red Algal ◽

Temporal And Spatial

Current research on marine cryptic species, through the use of molecular tools, is revealing unexpected diversity and relationships [...]. A number of cryptic filamentous Bangiales have been recorded from Wellington, New Zealand; all morphologically indistinguishable and all apparently occupying the same niche within the upper inter-tidal. Researchers have reported finding more than one member of the filamentous Bangiales coexisting at a single location in Wellington’s inner harbour (Farr et al. 2001, Wendy Nelson pers. comm.). This raises the question: to what extent are these cryptic lineages coexisting? Are there differences in their temporal and spatial distribution? Does distribution at a small-scale, within sites in the Wellington region, reflect the physiological differences and ecological adaption reported from the culture studies of Bödeker et al. 2008? This research sought to investigate the small-scale distribution of these cryptic lineages to test for temporal or spatial variation, and draw conclusions about the nature of their coexistence in the Wellington region. To achieve this, samples were taken from six sites in Wellington over a period of nine months. Molecular methods, as described in Chapter 2, were utilised to identify the various taxa. This identification data then provided the basis for the ecological analyses presented in Chapter 3.

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