{"refrec":{"BRefID":324993,"RR":"<b>Groh, K.; Bössneck, U.; Clewing, C.; Albrecht, C.; Richling, I.</b> (2020). A new pill clam from an unusual habitat: the interstitial <i>Pisidium interstitialis</i> n. sp. (Bivalvia: Sphaeriidae) from southwestern and Central Germany. <i>J. Moll. Stud. 86(2)</i>: 104-119. <a href=\"https://dx.doi.org/10.1093/mollus/eyz036\" target=\"_blank\">https://dx.doi.org/10.1093/mollus/eyz036</a>","BEntID":318470,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>J. Moll. Stud. 86(2)</i>: 104-119. <a href=\"https://dx.doi.org/10.1093/mollus/eyz036\" target=\"_blank\">https://dx.doi.org/10.1093/mollus/eyz036</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Groh, K.; Bössneck, U.; Clewing, C.; Albrecht, C.; Richling, I.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Groh, K. <i>et al.</i>","Englishabstract":"A new species of pill clam, <em>Pisidium interstitialis</em> n. sp. (Bivalvia: Sphaeriidae), is described from wet meadows bordering a small creek in the Odenwald, southwestern Germany, and from a similar habitat in the Thuringian Schistic Mountains, Central Germany. It can be differentiated from the known European <em>Pisidium</em> species on the basis of shell morphology and DNA sequence data for the mitochondrial cytochrome <em>c</em> oxidase subunit I and 16S rRNA genes. Despite critical evaluation of a large number of potential names from the current synonymies of morphologically similar <em>Pisidium</em> species, no available name was found. <em>Pisidium interstitialis</em> n. sp. is most similar to <em>P. personatum</em> Malm, 1856, and <em>P. casertanum</em> (Poli, 1791), both of which occur syntopically with the new species. Typical specimens of the new species can be readily identified on the basis of shell morphology. However, <em>P. personatum</em> and <em>P. casertanum</em> are morphologically highly variable, so that occasional overlap in conchological characters between these two species and <em>P. interstitialis</em> n. sp. does occur. Although these three taxa co-occur, microhabitat analyses using a special sampling technique showed that <em>P. interstitialis</em> n. sp. exhibits an exclusively interstitial lifestyle, living outside open water bodies. While other <em>Pisidium</em> species may live in the interstitial water of semi-terrestrial habitats, this is the first time that an exclusively interstitial lifestyle has been observed for <em>Pisidium</em> and this may explain why <em>P. interstitialis</em> n. sp. has remained undiscovered for so long. To date, despite the examination of large quantities of Central European samples of <em>Pisidium</em>, the new species is only known from the two areas reported in our study. It seems likely that further surveys will show that <em>P. interstitialis</em> n. sp. has a wider and more continuous distribution","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"A new pill clam from an unusual habitat: the interstitial <i>Pisidium interstitialis</i> n. sp. 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