Marcos A L TeixeiraUniversity of Minho · Centro de Biologia Molecular e Ambiental (CBMA)
Marcos A L Teixeira
PhD Student
PhD student working with cryptic annelids
About
29
Publications
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Introduction
2017/ current – Mixed PhD scholarship between Sven Lovén Centre for Marine Infrastructure, Tjarno (Sweden) and University of Minho (Portugal) under the Do*Mar doctoral programme.
Project: SFRH/BD/131527/2017: “Phyllodocida (Annelida, Polychaeta) of the North East Atlantic as model for the investigation of cryptic species”
Additional affiliations
November 2013 - September 2014
Publications
Publications (29)
DOI for the Supplemental Material: https://doi.org/10.6084/m9.figshare.18858224.v1.
Eumida sanguinea is a recognized polychaete species complex which, in previous studies, has been reported to have additional undescribed diversity. We detected nine additional lineages by analysing DNA sequence data (mitochondrial: COI, 16S rRNA and nuclear loci: I...
Building reference libraries of DNA barcodes is relatively straightforward when specifically designed primers are available to amplify the COI-5P region from a relatively narrow taxonomic group (e.g. single class or single order). DNA barcoding marine communities have been comparatively harder to accomplish due to the broad taxonomic diversity and...
Annelid polychaetes have been seldom the focus of dedicated DNA barcoding studies, despite their ecological relevance and often dominance, particularly in soft-bottom estuarine and coastal marine ecosystems. Here we report the first assessment of the performance of DNA barcodes in the discrimination of shallow water polychaete species from the sout...
Phyllodocida is a clade of errantiate annelids characterized by having ventral sensory palps, anterior enlarged cirri, axial muscular proboscis, compound chaetae (if present) with a single ligament, and of lacking dorsolateral folds. Members of most families date back to the Carboniferous, although the earliest fossil was dated from the Devonian. P...
Despite the growing use and potential of DNA metabarcoding to improve and expedite macrozoobenthos monitoring, its employment in Water Framework Directive (WFD) monitoring of transitional ecosystems still remains largely unexplored and pending proof-of-concept studies. In the current study, we addressed this research gap by building upon the biomon...
The accuracy of specimen identification through DNA barcoding and metabarcoding relies on reference libraries containing records with reliable taxonomy and sequence quality. The considerable growth in barcode data requires stringent data curation, especially in taxonomically difficult groups such as marine invertebrates. A major effort in curating...
The polychaete genusLaeonereis(Annelida, Nereididae) occurs over a broad geographic range and extends nearly across the entire Atlantic coast of America, from the USA to Uruguay. Despite the research efforts to clarify its diversity and systematics, mostly by morphological and ecological evidence, there is still uncertainty, mainly concerning the s...
Phyllodocida is a clade of errantiate annelids characterized by having ventral sensory palps, anterior enlarged cirri, axial muscular proboscis, compound chaetae (if present) with a single ligament, and of lacking dorsolateral folds. Members of most families date back to the Carboniferous, although the earliest fossil was dated from the Devonian. P...
The accuracy of the identification of unknown specimens using DNA barcoding and metabarcoding relies on reference libraries containing records with reliable taxonomy and sequence quality. A rampant growth in barcode data led to a stringent need for data curation, especially in taxonomically difficult groups such as marine invertebrates. A major eff...
Recent studies reporting complexes of cryptic or pseudo-cryptic species with narrow geographic distributions have been challenging the cosmopolitan status of a fair number of marine benthic invertebrates. Morphologically similar species are often overlooked but molecular techniques have been extremely effective in signalling potential hidden divers...
DNA metabarcoding provides a rapid and effective identification tool of macroinvertebrate species. The accuracy of species-level assignment, and consequent taxonomic coverage, relies on comprehensive DNA barcode reference libraries, which, due to incompleteness, are currently a recognized limitation for metabarcoding applications. In this study, we...
We report on two new lineages of the Eumida sanguinea complex from Great Britain and describe one of them as a new species using a multilocus approach, including the mitochondrial DNA COI‐5P and the nuclear markers ITS (ITS1, 5.8S rRNA and ITS2) and 28S rRNA. The molecular analysis placed Eumida mackiei sp. nov. in a monophyletic clade with 19.1% (...
Polychaetes are common in coastal and estuarine environments worldwide and constitute one of the most complex groups of marine invertebrates. The morpho-physiology of the female reproductive system (FRS) can be understood by using histological tools to describe reproductive cycle and gametogenesis paths and, among other purposes, aiming to identify...
With the rise of the molecular tools, the combination of both molecular and morphological data is becoming the typical way to describe new species. Over the last decade the diversity of the family Phyllodocidae (Annelida, Polychaeta) increased due to the discovery of multiple species complexes. Polychaetes are one of the most prominent bioindicator...
DOI: https://doi.org/10.1139/gen-2019-0083 Genome, 62(6): 349-453.
Background: The Polychaeta (Annelida), one of the most prominent bioindicator groups and well
represented class of organisms among the marine benthic invertebrates, seems to be particularly
afflicted by the frequent occurrence of cryptic species. Due to their abundance, cryptic spec...
Effective identification of species using short DNA fragments (DNA barcoding and DNA metabarcoding)requires reliable sequence reference libraries of known taxa. Both taxonomically comprehensive coverage and content quality are important for sufficient accuracy. For aquatic ecosystems in Europe, reliable barcode reference libraries are particularly...
Effective identification of species using short DNA fragments (DNA barcoding and DNA metabarcoding) requires reliable sequence reference libraries of known taxa. Both taxonomically comprehensive coverage and content quality are important for sufficient accuracy. For aquatic ecosystems in Europe, reliable barcode reference libraries are particularly...
Amphipods of the genus Gammarus are a vital component of macrozoobenthic communities in European inland and coastal, marine and brackish waters of the Mediterranean and the Black Sea. Exceptional levels of cryptic diversity have been revealed for several widespread freshwater Gammarus species in Europe. No comprehensive assessment has yet been made...
Background: Amphipods of the genus Gammarus are a salient component of communities in European inland and coastal, marine, and brackish waters of the North Atlantic, the Mediterranean, and the Black Sea. Exceptional levels of cryptic diversity have been revealed for several widespread freshwater species of Gammarus in Europe. No comprehensive asses...
The discovery of cryptic species has grown exponentially over the past decades. Due to their commonality, they can in no way be neglected if we want to correctly assess species diversity and distribution, understand biogeographic patterns, or assess and predict climate change-induced impacts. Occurrence of cryptic species appears to be particularly...
In this study we compared DNA barcode-suggested species boundaries with morphology-based species identifications in the amphipod fauna of the southern European Atlantic coast. DNA sequences of the cytochrome c oxidase subunit I barcode region (COI-5P) were generated for 43 morphospecies (178 specimens) collected along the Portuguese coast which, to...
The polychaetes of the order Phyllodocida (excluding Nereidiformia and Phyllodociformia incertae sedis) collected from deep-sea habitats of the Iberian margin (Bay of Biscay, Horseshoe continental rise, Gulf of Cadiz and Alboran Sea), and Atlantic seamounts (Gorringe Bank, Atlantis and Nameless) are reported herein. Thirty-six species belonging to...
Background: Amphipods are one of the most diverse and widely distributed groups of crustaceans, often constituting dominant or key elements of marine and coastal communities. As with many other marine invertebrate taxa, rigorous species identifications can be rather challenging, and cryptic species reports have been increasing. In this study we com...
Background: The estuarine and coastal intertidal areas have a large number of benthic invertebrates, where the annelid polychaetes are one of the most representative classes and, therefore, important indicators of environmental quality in these ecosystems. Yet, these organisms have been poorly studied, in comparison to other taxa of similar ecologi...
Projects
Projects (3)
Use DNA-based tools to identify hidden diversity in Macaronesia, Morocco, and the Iberian Peninsula
Update the list of species and records
Use of next-generation tools (DNA metabarcoding) for biodiversity monitoring and conservation in a scenario of global change.
- To create the foundations for the next generation coastal systems management based on knowledge and innovation and supported by experts in the areas of electronics, materials, taxonomy, ecology, conservation and metagenomics, using the NW of Portugal as a case study
- To develop efficient monitoring procedures based on cutting-edge technologies (lab-on-chip, MEMs, smart materials and underwater networks together in marine electronics applications) in order to broaden the type, frequency, temporal and spatial scales of variables and type of habitats monitored
- Development of a remotely operated system of sensors to measure physical oceanographic variables, in order to build models of circulation (water and sediments) and understand the role of the three dimensional water column in the coastal phenomena
- To create the foundations for the next generation coastal systems management based on knowledge and innovation and supported by experts in the areas of electronics, materials, taxonomy, ecology, conservation and metagenomics, using the NW of Portugal as a case study
- To develop efficient monitoring procedures based on cutting-edge technologies (lab-on-chip, MEMs, smart materials and underwater networks together in marine electronics applications) in order to broaden the type, frequency, temporal and spatial scales of variables and type of habitats monitored
- Development of a remotely operated system of sensors to measure physical oceanographic variables, in order to build models of circulation (water and sediments) and understand the role of the three dimensional water column in the coastal phenomena
