Two new species of Pista were collected in 2008 and 2010 from the muddy sand in the Northern Adriatic Sea (Mediterranean). They were initially identified as Pista cf. lornensis (Pearson, 1969) however this seemed unlikely given that this species was described from Loch Linnhe, on the north west coast of Scotland. Examination of the material in detail revealed two undescribed species. Pista sp.n. (Rovinj city harbor, 7m, 30.09.2010.) is characterised by branchial filaments arranged in separate tiers from a main stalk, lateral lobes continue mid ventrally, and anterior notopodia much smaller than subsequent ones. Pista sp.n. (offshore station 13NM off the western coast of Istria, 31m, 05.12.2008.) has branchial filaments arranged in a spiral from the main stalk, with 1st pair of notopodia very small with few small chaetae, and 2nd also small, subsequent notopodia with swollen glandular bases, lower lip forms a ridged lobe and the shape and arrangement of lateral lobes on segments 2, 3 and 4 differs from Pista sp.n. (Rovinj city harbor, 7m, 30.09.2010.) .These two new species are compared to other species described from the region, but a complete revision of the genus is urgently needed.
Two new species of Pista Malmgren, 1866 (Polychaeta: Terebellidae) from the Adriatic Sea (Mediterranean)
Mikac B
2016
Abstract
Two new species of Pista were collected in 2008 and 2010 from the muddy sand in the Northern Adriatic Sea (Mediterranean). They were initially identified as Pista cf. lornensis (Pearson, 1969) however this seemed unlikely given that this species was described from Loch Linnhe, on the north west coast of Scotland. Examination of the material in detail revealed two undescribed species. Pista sp.n. (Rovinj city harbor, 7m, 30.09.2010.) is characterised by branchial filaments arranged in separate tiers from a main stalk, lateral lobes continue mid ventrally, and anterior notopodia much smaller than subsequent ones. Pista sp.n. (offshore station 13NM off the western coast of Istria, 31m, 05.12.2008.) has branchial filaments arranged in a spiral from the main stalk, with 1st pair of notopodia very small with few small chaetae, and 2nd also small, subsequent notopodia with swollen glandular bases, lower lip forms a ridged lobe and the shape and arrangement of lateral lobes on segments 2, 3 and 4 differs from Pista sp.n. (Rovinj city harbor, 7m, 30.09.2010.) .These two new species are compared to other species described from the region, but a complete revision of the genus is urgently needed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
