A diverse chasmataspidid (Arthropoda: Chelicerata) fauna from the Early Devonian (Lochkovian) of Siberia. (18th November 2013)

• Record Type: Journal Article
• Authors: Marshall, David J.; Lamsdell, James C.; Shpinev, Evgeniy; Braddy, Simon J.; Dunlop, Jason
• Is Part Of: Palaeontology. Volume 57:Part 3(2014:May)
• Page Start: 631
• Page End: 655
• Publication Date: 2013-11-18
• Subjects: Paleontology -- Periodicals; 560
• DOI: 10.1111/pala.12080
• Languages: English
• ISSNs: 0031-0239

Abstract

<abstract abstract-type="main" id="pala12080-abs-0001"> <title>Abstract</title> <p>Examination of material held at the Palaeontological Institute, Moscow, enables the identification of two novel chasmataspidid species: <italic>Nahlyostaspis bergstroemi</italic> gen. et sp. nov. and <italic>Skrytyaspis andersoni</italic> gen. et sp. nov. '<italic>Eurypterus</italic>' <italic>stoermeri</italic> and '<italic>Tylopterella</italic>' <italic>menneri</italic> are both redescribed as chasmataspidids, having previously been assigned to Eurypterida. '<italic>T</italic>'. <italic>menneri</italic> is transferred to the new genus <italic>Dvulikiaspis</italic> gen. nov. An identical prosomal structure is identified in '<italic>Eurypterus</italic>' <italic>stoermeri</italic> and <italic>Heteroaspis novojilovi</italic> from the Devonian of Germany and the two species are synonymized, with '<italic>E</italic>' <italic>stoermeri</italic> having priority. The previous synonymy of <italic>H. novojilovi</italic> with <italic>Diploaspis casteri</italic> is rejected. The presence of ophthalmic ridges is confirmed within Diploaspididae, and new structural characteristics of their bucklers are identified.</p> </abstract>