Bicknell, R.D. and Pates, S., 2020. Pictorial atlas of
fossil and extant horseshoe crabs, with focus on
Xiphosurida. Frontiers in Earth Science, 8, p.1-60.
PDF of above paper from Researchgate
Other recent papers (PDF files) about Xiphosurida.
Bicknell, R.D., Naugolnykh, S.V. and Brougham, T.,
2020. A reappraisal of Paleozoic horseshoe crabs from
Russia and Ukraine. The Science of Nature, 107(5), pp.1-17.
Bicknell, R.D. and Smith, P.M., 2020. Patesia n. gen., a
new Late Devonian stem xiphosurid genus. Palaeoworld.
Bicknell, R.D., Hecker, A. and Heyng, A.M., 2021.
New horseshoe crab fossil from Germany demonstrates
post-Triassic extinction of Austrolimulidae.
Geological Magazine, pp.1-11.
Lamsdell, J.C., 2020. The phylogeny and systematics
of Xiphosura. PeerJ, 8, p.e10431. Open Access
Rudkin, D.M. and Young, G.A., 2009. Horseshoe crabs–
an ancient ancestry revealed. In Biology and conservation
of horseshoe crabs (pp. 25-44). Springer, Boston, MA
Yours,
Paul H.