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Larval trematodes infecting the South-American intertidal mud snail Heleobia australis (Rissooidea: Cochliopidae)

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Alda P., Martorelli S. R.

Acta Parasitologica

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2014

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tom 59

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nr 1

Larval trematodes infecting the snail Heleobia australis (Cochliopidae) from the Bahía Blanca estuary, Argentina were surveyed for two years. A total of 7,504 snail specimens was dissected and the larval stages of 15 different trematodes were recovered and examined morphologically. These larvae included four species that had previously been reported from H. australis in Brazil, Uruguay, and Argentina: the heterophyid Ascocotyle (Phagicola) longa and the microphallids, Maritrema bonaerense, Maritrema orensense, and Microphallus simillimus. Three other species, the echinostomatid Stephanoprora uruguayensis, the microphallid Levinseniella cruzi, and the psilostomid Psilochasmus oxyurus are reported here for the first time as parasites of H. australis. Eight other trematodes found in H. australis are described and placed in the appropriate superfamilies, families or genera (Cryptogonimidae, Apocreadiidae, Aporocotylidae, Notocotylidae, Haploporidae, Renicolidae, Himasthla, and Renicola). The prevalence of the trematode taxa infecting H. australis in the Bahía Blanca estuary was low (<3%) with a single exception (M. simillimus; >20%). Microphallidae were the richest and the most prevalent family, probably because of the high abundance of crabs — the second-intermediate hosts of certain microphallid species — and the considerable diversity of gulls. Here we compare the parasite assemblage found in the H. australis from Bahía Blanca estuary with other parasite assemblages infecting Heleobia spp. and other rissooids from the rest of the world.

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Phylogenetic relationships of Alzoniella slovenica (Lozek et Brtek, 1964) (Caenogastropoda: Hydrobiidae)

80%

Szarowska M., Falniowski A., Steffek J.

Folia Malacologica

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2011

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tom 19

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nr 2

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Pseudamnicola exilis (Frauenfeld, 1863) in southern Greece: a remnant of a flock of species (Rissooidea: Hydrobiidae)?

80%

Szarowska M., Falniowski A.

Folia Malacologica

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2011

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tom 19

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nr 3

The morphology of shell, penis, and female reproductive organs was studied in five populations of Pseudamnicola exilis (Frauenfeld) from southern Peloponnese and Kithira Island (Greece). No interpopulation differences were found in any of the characters. Thirty eight sequences of mitochondrial cytochrome oxidase subunit I (COI) and nuclear ribosomal 18S RNA genes were analysed. In COI 19 haplotypes, high haplotypy diversity, low nucleotide diversity in each population, and restricted gene flow between populations were found. NCA indicated allopatric fragmentation for all populations, and long-distance colonisation and/or past fragmentation for populations 4 and 5. Mismatch distribution in the most polymorphic population 4 reflected a bottleneck followed by population growth. The values of K2P interpopulation distances, though relatively low, pointed to congeneric distinct species within the Rissooidea. The monophyly of Pseudamnicola/Adrioinsulana clade was confirmed. Most probably the studied populations of Pseudamnicola were part of a flock of vicariant species little differentiated in morphology and ecology, many of which must have disappeared due to human impact.

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Radiation in Bythinella Moquin-Tandon, 1856 (Mollusca: Gastropoda: Rissooidea) in the Balkans

80%

Falniowski A., Szarowska M., Gloer P., Pesic V., Georgiev D., Horsak M., Sirbu I.

Folia Malacologica

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2012

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tom 20

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nr 1

61 sequences of cytochrome oxidase subunit 1 (COI), 570 bp long, from Central Europe (8), Slovenia (2), and from the Balkans (51: 6 from, Romania, 15 from Greece, 15 from Bulgaria, 6 from Serbia, and 9 from Montenegro), 33 of them new, together with 61 sequences of the ribosomal 18S, 450 bp long, all of them new, were analysed to infer the pattern of radiation of Bythinella in the Balkans. Thirty two nominal taxa of Bythinella (22 nominal species: B. austriaca, B. calimanica, B. charpentieri, B. compressa, B. dacica, B. dispersa, B. grossui, B. hansboetersi, B. luteola, B. micherdzinskii, B. molcsanyi, B. nonveilleri, B. pannonica, B. pesterica, B. radomani, B. rhodopensis, B. robiciana, B. schmidti, B. slaveyae, B. srednogorica, B. taraensis and B. viseuiana; one nominal subspecies: B. austriaca ehrmanni; and nine Greek species not yet described) were included, represented mostly by paratypes or at least topotypes, collected at 31 Balkan localities. The phylogeny, inferred on the combined data set with the ML approach, showed two large clades, although they were weakly supported. One of them comprised the Romanian and Montenegro populations, and one Serbian population, the other (less genetically diversified) consisted of one Serbian and all the Bulgarian/Greek populations. The origin of those two clades was dated, with the external data, to be more than 4.341±0753 MYA old, thus its origin was assigned to isolation by the Dacic Basin (part of Paratethys). All the Bulgarian populations presumably belong to one species, which may be assigned to the recent recolonisation of this territory from the south.

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Early ontogeny and palaeoecology of the Mid-Miocene rissoid gastropods of the Central Paratethys

80%

Kowalke T., Harzhauser M.

Acta Palaeontologica Polonica

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2004

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tom 49

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nr 1

Twenty−six species of Rissoidae (Caenogastropoda: Littorinimorpha: Rissooidea) are described from the Badenian and Early Sarmatian of 14 localities in Austria and the Czech Republic (Molasse Basin, Styrian Basin, Vienna Basin) and from the Badenian of Coştei (Romania). For the first time, the early ontogenetic skeletal characters of these gastropods are described. Based on these features an indirect larval development with a planktotrophic veliger could be reconstructed for all investigated Mid−Miocene species. The status of Mohrensterniinae as a subfamily of the Rissoidae is confirmed by the morphology of the low conical protoconch, consisting of a fine spirally sculptured embryonic shell and a larval shell which is smooth except for growth lines. Transitions from embryonic shells to larval shells and from larval shells to teleoconchs are slightly thickened and indistinct. Whilst representatives of the subfamily Rissoinae characterise the marine Badenian assemblages, Mohrensterniinae predominate the Early Sarmatian faunas. We hypothesize that this take−over by the Mohrensterniinae was triggered by changes in the water chemistry towards polyhaline conditions. Consequently, the shift towards hypersaline conditions in the Late Sarmatian is mirrored by the abrupt decline of the subfamily. Four new species Rissoa costeiensis (Rissoinae) from the Badenian and Mohrensternia hollabrunnensis, Mohrensternia pfaffstaettensis, and Mohrensternia waldhofensis (Mohrensterniinae) from the Early Sarmatian are introduced.

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Destroyed and threatened localities of rissooid snails (Gastropoda: Rissooidea) in Greece

70%

Szarowska M., Falniowski A.

Folia Malacologica

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2011

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tom 19

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nr 1

In September 2003 we visited localities of rissooid snails in continental Greece, known from the literature. Nine springs (type localities included), situated in urbanized or cultivated areas, were destroyed, changed or under stress. Localities of Rissooidea in Greece need urgent protection, otherwise the snails may disappear altogether.

Ograniczanie wyników

4 Folia Malacologica

1 Acta Palaeontologica Polonica

1 Acta Parasitologica

4 Falniowski A.

4 Szarowska M.

1 Alda P.

1 Georgiev D.

1 Gloer P.

1 Harzhauser M.

1 Horsak M.

1 Kowalke T.

1 Martorelli S. R.

1 Pesic V.

1 Sirbu I.

1 Steffek J.

1 2014

1 2012

3 2011

1 2004

Larval trematodes infecting the South-American intertidal mud snail Heleobia australis (Rissooidea: Cochliopidae)

Phylogenetic relationships of Alzoniella slovenica (Lozek et Brtek, 1964) (Caenogastropoda: Hydrobiidae)

Pseudamnicola exilis (Frauenfeld, 1863) in southern Greece: a remnant of a flock of species (Rissooidea: Hydrobiidae)?

Radiation in Bythinella Moquin-Tandon, 1856 (Mollusca: Gastropoda: Rissooidea) in the Balkans

Early ontogeny and palaeoecology of the Mid-Miocene rissoid gastropods of the Central Paratethys

Destroyed and threatened localities of rissooid snails (Gastropoda: Rissooidea) in Greece