Abstract

In this report, we record the rediscovery of Sanderia malayensis in Pakistani waters since the John Murray Expedition (1933‑34) who collected two small specimens off-Karachi, Pakistan. The specimens were described and we discuss the shape of gastric pouches contour. We also comment upon the newly recorded Rhopilema nomadica jellyfish from the region, and assume it to be previously recorded as Rhopilema hispidum.

Highlights

  • Sanderia Goette, 1886 is a genus of scyphozoan jellyfishes that includes two species: Sanderia malay‐ ensis Goette, 1886 and S. pampinosus Gershwin & Zeidler, 2008

  • Sanderia malayensis occurs in Indo-Pacific waters, while S. pampinosus is restricted to northwestern Australia (Kramp, 1961; Gershwin & Zeidler, 2008)

  • The knowledge of scyphomedusae from Pakistan is growing in the last years with several new records being reported (Gul & Morandini, 2013, 2015; Gul et al, 2014, 2015a, b), and added to the cnidarian fauna (Gul et al, 2015c)

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Summary

Introduction

Sanderia Goette, 1886 is a genus of scyphozoan jellyfishes that includes two species: Sanderia malay‐ ensis Goette, 1886 and S. pampinosus Gershwin & Zeidler, 2008. There are nine scyphozoan jellyfishes recorded from Pakistani waters (Gul et al, 2015b), a number that corresponds to less than 5% of the total biodiversity of the class Scyphozoa (estimated in ~200 species by Daly et al, 2007). Out of these records, the only ones of the family Pelagiidae Gegenbaur, 1856 are: Pelagia noctiluca (Forskål, 1775) and Sanderia malayensis Goette, 1886 (Stiasny, 1937; Gul & Morandini, 2013); interestingly the last report of S. malayensis was documented 79 years ago by Stiasny (1937). We provided comments on the recently recorded Rhopilema nomadica Galil, 1990 (Tahera & Kazmi, 2015) from Pakistan and consider it to be erroneously identified Rhopilema hispidum jellyfish previously recorded from this area (Gul & Morandini, 2015)

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