Pseudoniscus falcatus (Woodward, 1868)

Bicknell, Russell D C, Amati, Lisa & Ortega-Hernández, Javier, 2019, New insights into the evolution of lateral compound eyes in Palaeozoic horseshoe crabs, Zoological Journal of the Linnean Society 187 (4), pp. 1061-1077 : 1066

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https://doi.org/10.1093/zoolinnean/zlz065

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https://treatment.plazi.org/id/611B87F4-FFB8-FF9B-15FA-FA0EFC05FE7E

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Plazi

scientific name

Pseudoniscus falcatus
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Pseudoniscus falcatus

The holotype (NHMUK IA 44122) from the Silurian-aged (Wenlock)?Patrick Burn Formation, Scotland (sensu Anderson, 1999) was originally described a n d r e c o n s t r u c t e d w i t h s m a l l, k i d n e y -s h a p e d (reniform) LCEs on ophthalmic ridges ( Woodward, 1868). In contrast, Størmer (1952) reconstructed Pseudoniscus falcatus without LCEs. Reconsideration of the holotype ( Fig. 3A, B) shows no evidence of LCEs, although prominent ophthalmic ridges are present, particularly well expressed on the left side of the prosomal shield.

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