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Lanarkopterus dolichoschelus (Størmer) gen. nov., a mixopterid eurypterid from the Upper Silurian of the Lesmahagow and Hagshaw Hills inliers, Scotland

1968; Zoological Society of London; Volume: 4; Issue: 4 Linguagem: Inglês

10.1144/sjg04040317

2041-4951

Alexander Ritchie,

Paleontology and Evolutionary Biology

Synopsis New material of Mixopterus dolichoschelus, a large eurypterid from the Upper Silurian inliers in Lanarkshire and Ayrshire, Scotland has made possible the first full description of the form, with dorsal and ventral reconstructions. In many features (shape of prosoma, nature of the large ‘walking’ legs (III)) M. dolichoschelus differs significantly from the Norwegian Mixopterus kiaeri Størmer and it is proposed that the Scottish species be placed in a new genus for which the name Lanarkopterus is proposed. A comparison of the enlarged, spinose legs (III) in Megalograptus, Lanarkopterus and Mixopterus suggests a new interpretation of joint numeration in the last two genera.