Physalia physalis structure: axes, cormidia, and you can zooid versions

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Siphonophores add a great amount of functionally certified zooids which might be homologous to free living polyps otherwise medusae twenty-seven (Fig. step 1 ). Physalia physalis falls under Cystonectae, a clade which is sis to all the most other siphonophores 8 . Inside the a lot of time-stemmed cystonects (the cystonects apart from Physalia physalis) gastrozooids (giving polyps) happen because Crossdresser dating websites free the buds regarding anterior of the nest as they are sent into the rear from the an enthusiastic elongating stem, when you find yourself gonodendra (reproductive structures) are available independently across the stem twenty-eight . In all cystonects, new gonodendra was substance structures, that features gonophores (quicker medusae, bearing an effective gonad), palpons (derived gastrozooids, one to run out of tentacles when you look at the cystonects), and you can nectophores twenty-seven . P. physalis gonodendra provides such zooids, along with ‘jelly polyps' which can be quicker nectophores off unsure means twenty-two , 26 .

Compared to the almost every other siphonophore types, plus most other cystonects, Physalia physalis is actually strange regarding its nest organization (Figs step one and you can ? anddos). 2 ). P. physalis is additionally the only real siphonophore variety where in fact the gastrozooid, an important giving zooid, does not have an excellent tentacle to possess target just take.