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. 2017 Oct 13;5:e3863. doi: 10.7717/peerj.3863

Figure 8. Morphological evidence separating Chrysaora quinquecirrha and Chrysaora chesapeakei.

Figure 8

(A) Tentacle counts. Graph represents tentacles per octant against bell diameter (mm) for field collected and museum specimens. Squares represent animals taken from estuarine Atlantic and Gulf of Mexico regions (Chrysaora chesapeakei), while circles represent animals taken from coastal Atlantic regions (Chrysaora quinquecirrha). All animals with 16S sequences matching the Chrysaora chesapeakei clade appear in red, while those whose sequences matched the Chrysaora quinquecirrha clade appear in blue. (B) Maximum oral arm measurements. Graph represents maximum oral arm length against bell diameter (mm) for field-collected and museum specimens. Squares represent animals taken from U.S. Atlantic estuaries and the Gulf of Mexico (Chrysaora chesapeakei), while circles represent animals taken from coastal Atlantic regions (Chrysaora quinquecirrha). Only animals with fully intact and extended oral arms were included. All animals with 16S sequences matching the Chrysaora chesapeakei clade appear in red, while those whose sequences matched the Chrysaora quinquecirrha clade appear in blue. (C) Average size measurements for holotrichous A-isrohiza nematocysts (length vs. width), based on 10 nematocysts per. Error bars represent 95% CI (2*standard error). Squares represent nematocysts from estuarine Atlantic and Gulf of Mexico medusae (Chrysaora chesapeakei), while circles represent nematocysts from coastal Atlantic medusae (Chrysaora quinquecirrha). Photograph of an average sized A-isorhiza from Chrysaora quinquecirrha appears on the left and a photograph of an average size A-isorhiza from Chrysaora chesapeakei appears on the right. Scale bars = 10 μm. Photographs have been resized so that all error bars are the same size on the page to allow size comparisons. All animals with 16S sequences matching the Chrysaora chesapeakei clade appear in red, while those whose sequences matched the Chrysaora quinquecirrha clade appear in blue. Triangles represent average values from Papenfuss (1936) for morphs identified as Dactylometra quinquecirrha (gray) or Dactylometra quinquecirrha var. chesapeakei (white).