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- Eggens, Frida, et al.
(författare)
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Phylogeny and species delimitation in Silene sect. Arenosae (Caryophyllaceae): a new section
- 2020
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Ingår i: Phytokeys. - : Pensoft Publishers. - 1314-2011 .- 1314-2003. ; :159, s. 1-34
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Tidskriftsartikel (refereegranskat)abstract
- A putatively monophyletic group of annual Silene species is revised taxonomically and described as the new section S. sect. Arenosae. The species of this section were previously treated as a part of a widely circumscribed and polyphyletic S. sect. Rigidulae. Silene sect. Arenosae as circumscribed here consists of nine species. Members of the section show a predominantly E Mediterranean to SW Asian distribution pattern from Turkey southward to Egypt and eastward to Iran and Pakistan, although most of the species have a limited distribution range. The species of S. sect. Arenosae are characterized by narrowly lanceolate calyx teeth, which are often highly polymorphic, and lanceolate to oblanceolate (non-spathulate) basal leaves. The provided taxonomic revision is based on morphological characters and supported by phylogenetic analyses of two nuclear loci (nrITS and an intron of the RPB2 gene) and one chloroplast locus (the intron of the rps16 gene). The species descriptions are formalized using a novel implementation of the Prometheus Description Model.
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| 2. |
- Pereira, Raquel
(författare)
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In Murky waters : Swedish demosponges and their genealogies
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Swedish Sponge fauna last updated happened over 80’s years ago. This fact explains, partially, the country’s low sponge. In this thesis, I update our knowledge of the swedish demosponge fauna (Paper I and II) and, give an insight to the relationship within one of the most common sponge groups in the country belonging to order Suberitida (Paper III and IV), as well as to investigate possible dispersal barriers for freshwater sponges (Paper I). I relied on my own sampling, museum specimens and the marine inventory by STI. In total, we found nine new reports for Sweden (one freshwater and eight in sea water) and one new species to science (sea water). In the freshwater survey using Spongilla lacustris (Paper I) we tested if catchment areas represented dispersal barriers, but with the marker used we could not observe a clear population structure. For the marine environment the collected material contained what appear to be several species Suberites (Paper II). This genus, and many taxa within the order, is known for a paucity of morphological characters and long taxonomic history. This while being known for not representing a natural group. Thus, in order to know what species of Suberites present in Sweden we had to answer: What is the circumscription for the genus? What are its relationships with other suberitids? What are the oldest available names for the genus and the species within?In Paper III, we use phylogenetics to infer the relationships within Suberitida. The trees showed two separate clades for Suberites - A and B. Clade B was together with the genus Aaptos, a Homaxinella species and Stylocordyla - family Stylocordylidae and, given that result we argued for expansion of Stylocordylidae. In Paper IV, we did an extensive literature review of the senior names for clade A and B. Plus, we presented species delimitation and their names for 30 species found in the Northern Temperate Atlantic realm. We argue for the resurrection of Syringella as the name for clade B. While, in clade A (under the name of Suberites), we make the case for S. ficus proper name to be S. subereus and, we solved the homonymy with the name S. virgultosus by naming the species found by Bowerbank - Suberites sp. ”misterbeanii”.
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| 3. |
- Robert, Chloé, et al.
(författare)
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Addition to Sweden's freshwater sponge fauna and a phylogeographic study of Spongilla lacustris (Spongillida, Porifera) in southern Sweden
- 2022
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Ingår i: European Journal of Taxonomy. - : Museum National D'Histoire Naturelle. - 2118-9773. ; 828, s. 138-167
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Tidskriftsartikel (refereegranskat)abstract
- Freshwater sponges constitute an overlooked part of the freshwater fauna in Sweden and there has been no recent systematic survey. Hitherto three species have been found in Sweden: Spongilla lacustris (Linnaeus, 1759), Ephydatia fluviatilis (Linnaeus, 1759) and E. muelleri (Lieberkuhn, 1856). Neighbouring countries (Norway, Denmark, Estonia) harbour at least one additional species. We present a study on freshwater sponge diversity and distribution in the southern half of Sweden. We hypothesized dispersal within catchments to be less constrained than between, even at shorter intercatchment than intracatchment distances, and, as result, genetic distances being greater between than within catchments. We collected and identified freshwater sponges from 34 sites, using morphological and molecular data (coil, 28S rRNA gene). We can report the presence of Eunapius fragilis (Leidy, 1851) in Sweden for the first time, and that S. lacustris is the most abundant and widely distributed freshwater sponge in Sweden. Genetic markers were tested on S. lacustris individuals for a phylogeographic study. From the 47 primers (24 markers), one pair presented successful amplification and enough variation for phylogeographic studies - i56, an intron located in a conserved gene. Seven different variants were found in the sampling area, but no clear population structure was observed.
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