The genus <i>Acanthochitona</i> (Mollusca: Polylacophora) in the Mediterranean Sea: morphological and molecular data

En el presente trabajo se pretende resolver la confusa taxonomía de las especies mediterráneas de los quitones del género Acanthochitona a través de su estudio morfológico (observaciones al SEM de aestetes, rádula y cintura) y molecular (COI, 12S, ITS1). En ambos casos se confirma la validez de las tres especies Acanthochitona fascicularis, A. crinita y A. oblonga, las dos últimas consideradas previamente como sinónimas

Soft tissue regeneration using leukocyte-platelet rich fibrin after exeresis of hyperplastic gingival lesions: Two case reports

Introduction The Leukocyte-PRF (Leukocyte-Platelet Rich Fibrin) belongs to a second generation of platelet concentrates which doesn’t need a biochemical blood manipulation. It is used for tissue healing and regeneration in periodontal and oral-maxillofacial surgery. We report two cases of hyperplastic gingival lesions treated by exeresis and application of PRF membranes in order to improve and accelerate tissue healing. Case Presentation Two patients (one Caucasian female, 78-year-old, and one Caucasian male, 30-year-old) were treated for hyperplastic gingival lesions. They underwent to exeresis of lesions and application of PRF membranes. Tissue healing was clinically evaluated after one, three, seven, fourteen and thirty post-operative days. No recurrences were observed after two years of semiannual follow up. Conclusion We obtained rapid and good healing of soft tissues probably due to the elevated content of leukocytes, platelets and growth factors in the leukocyte-platelet rich fibrin. According to our results we suggest L-PRF employment for wounds covering after exeresis of oral neoformations such as hyperplastic gingival lesions

The new Checklist of the Italian Fauna: marine Mollusca.

The mollusc fauna of the Mediterranean Sea is still considered as the best-known marine mollusc fauna in the world. The previous modern checklists of marine Mollusca were produced by joint teams of amateurs and professionals. During the last years the Italian Society of Malacology (Società Italiana di Malacologia – S.I.M.) maintained an updated version of the Mediterranean checklist, that served as the backbone for the development of the new Italian checklist. According to the current version (updated on April 1st, 2021), 1,777 recognised species of marine molluscs are present in the Italian Economic Exclusive Zone, including also the Tyrrhenian coasts of Corsica and the continental shelf of the Maltese archipelago. The new checklist shows an increase of 17% of the species reported in the 1995 Checklist. This is largely (yet not solely) due to the new wave of studies based on Integrative Taxonomy approaches. A total of 135 species (7.6%) are strictly endemic to the Italian waters; 44 species (2.5%) are alien and correspond to the 28% of the Mediterranean alien marine molluscs. All eight extant molluscan classes are represented. The families represented in the Italian fauna are 307, an increase of 14.6% from the first checklist, partly due to new records and partly to new phylogenetic systematics. Compared with the whole Mediterranean malacofauna, the Italian component represents 71% in species and 61% in families, which makes it a very remarkable part of the Mediterranean fauna

Notes on Fossil Chitons. 1. A new species of Lepidopleurus (Mollusca: Polyplacophora) from the Pleistocene of Salice (Sicily, Italy)

On a new fossil species of Polyplacophora from Sicil

The Polyplacophora of Easter Island

Three species of Polyplacophora are found on Easter Island: Plaxiphora inercatoris Leloup, 1936, which was the only known species for 50 years, Rapanuia disalvoi gen. &amp; sp. nov., and Weedingia cf. mooreana Kaas, 1988. The living specimens of Rapanuia disalvoi were collected in 1984-1985, and several hundred valves in more recent years, but no additional live specimens have been found. This species, at first, appears very similar to Tonicia, but the absence of pectination on the teeth of the insertion lamina leads us to define the new genus Rapanuia and consequently the new subfamily Rapanuiinae. Three valves of a third chiton species, similar to Weedingia mooreana, were also discovered. The differences with W. mooreana are discussed

Notes on fossil chitons. 2. Polyplacophora from the Middle Miocene of Lapugiu (Romania)

This paper report six chiton species from Lower Badenian deposits of L?pugiu de Sus (Hunedoara, Valea Cosului, Romania). The taxa are: Lepidopleurus (L.) cajetanus (Poli, 1791), Ischnochiton (I.) rissoi (Payraudeau, 1826), Chiton (Rhyssoplax) olivaceus Spengler, 1797, Chiton (Rhyssoplax) corallinus (Risso, 1826), Acanthochitona fascicularis (Linnaeus, 1767), and Cryptoplax weinlandi Sulc, 1934. A table is given of all the fossil Polyplacophora reported from the literature in Romania Badenian deposits (L?pugiu, Beius, Islaz, Costei, Buituri, and Basesti). Ischnochiton rissoi has not been reported before from the Badenian of Romania