Arthropods, 2019, 8(1): 1-6
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Early developmental stage of Pentapycnon charcoti Bouvier

John A. Fornshell1, Austin Patrick Harlow2
1National Museum of Natural History, Department of Invertebrate Zoology, Smithsonian Institution, Washington DC, USA
2Volgenau School of Engineering, George Mason University, Fairfax City, VA 22030, USA

Received 12 November 2018;Accepted 14 December 2018;Published 1 March 2019

The first post hatching stage of Pentapycnon charcoti Bouvier is described for the first time. The eggs and first hatching stage were recovered from a cocoon carried on the ovigerous appendages of an adult male specimen archived in the collections of the National Museum of Natural History. Several different morphologies of the first hatching stage of the family Pycnogonidae have been described by Bain (2003) and Brenneis et al. (2017). The first hatching stage of P. charcoti was analogous to Bain's typical protonymphon and Brenneis' et al. type one protonymphon. This stage displays morphological characteristics of an embryo.

Keywords Pentapycnon charcoti Bouvier;developmental stage;pycnogonidae.

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