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7 results for “cubozoan”
Data from: Statolith morphometrics can discriminate among taxa of cubozoan jellyfishes
Identification of potentially harmful cubomedusae is difficult due to their gelatinous nature. The only hard structure of medusae, the statolith, has the potential to provide robust measurements for morphometric analysis. Traditional morphometric length to width ratios (L: W) and modern morphometric Elliptical Fourier Analysis (EFA) were applied to proximal, oral and lateral statolith faces of 12 cubozoan species. EFA outperformed L: W as L: W did not account for the curvature of the statolith. Best discrimination was achieved with Canonical Discriminant Analysis (CDA) when analysing proximal + oral + lateral statolith faces in combination. Normalised Elliptical Fourier (NEF) coefficients classified 98% of samples to their correct species and 94% to family group. Statolith shape agreed with currently accepted cubozoan taxonomy. This has potential to assist in identifying levels of risk and stock structure of populations in areas where box jellyfish envenomations are a concern as the severity of envenomation is family dependent. We have only studied 12 (27%) of the 45 currently accepted cubomedusae, but analyses demonstrated that statolith shape is an effective taxonomic discriminator within the Class.
FIGURE 6 in Morphology and life cycle of Carybdea morandinii, sp. nov. (Cnidaria), a cubozoan with zooxanthellae and peculiar polyp anatomy
FIGURE 6. Line drawing of a 3-month-old medusa of Carybdea morandinii (bell height approximately 5 mm).
FIGURE 3 in Morphology and life cycle of Carybdea morandinii, sp. nov. (Cnidaria), a cubozoan with zooxanthellae and peculiar polyp anatomy
FIGURE 3. Cyst with anchor mucus threads (white FIGURE 4. Cyst with anchor mucus threads (black arrow) as resting stage, attached to substrate; P = arrow) as resting stage, attached to water surface; Z = polyp, PH = mucus cover, Z = cyst. cyst.
FIGURE 1 in Morphology and life cycle of Carybdea morandinii, sp. nov. (Cnidaria), a cubozoan with zooxanthellae and peculiar polyp anatomy
FIGURE 1. Polyp anatomy of Carybdea marsupialis (after Jarms 2003; Type 1: unchambered gastric cavity) compared with that of Carybdea morandinii, sp. nov. (Type 2: horizontally divided twochambered gastric cavity).
FIGURE 5 in Morphology and life cycle of Carybdea morandinii, sp. nov. (Cnidaria), a cubozoan with zooxanthellae and peculiar polyp anatomy
FIGURE 5. Creeping polyp of Carybdea morandinii, sp. nov. Note the presence of zooxanthellae in the oral end.
FIGURE 2 in Morphology and life cycle of Carybdea morandinii, sp. nov. (Cnidaria), a cubozoan with zooxanthellae and peculiar polyp anatomy
FIGURE 2. Longitudunal sections of the polyp of Carybdea morandinii, sp. nov. a) Histological section of the hypostome region; the shutter-lens-like diaphragm was torn off at the right side during sectioning. b) Histological section of one side of the hypostome, showing zooxanthellae in the mouth region (Z) and green-stained mesoglea branching into the shutter-lens-like diaphragm lid (white arrow); C = calyx, Ec = epidermal tissue, En = gastrodermal tissue, H = Hypostome, M = mesoglea, Tb = tentacle base, D = shutter-lens-like diaphragm, Z = zooxanthellae.
Data from: Statolith morphometrics can discriminate among taxa of cubozoan jellyfishes
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