Figure 1.
Micrographs showing different hydroids emerging from Acropora muricata axial corallites.
A gonozooid showing an immature medusa (A) and gastrozooid (B). Micrographs of a gastrozooid attached to the axial corallites, showing ingested food, taken with normal light (C) and blue fluorescence (D). Blue fluorescence is present in the coral and in the food, but the hydroid itself shows none. Micrographs of a mature medusa and gastrozooid attached to the coral with normal (E) and combined green-red fluorescence (F). Unlike the gastrozooid, the mature medusa shows green fluorescence. Details of immature (G) and mature (H) medusae.
Table 1.
Information regarding coral samples surveyed in situ and collected from Chinwan Inner Bay (CIB), Penghu, Taiwan, and markers used for each sample.
Figure 2.
Phylogenetic tree based on 16S (A) and 28S (B) gene sequences.
The topology was inferred using a maximum-likelihood (ML) analysis. Numbers on main branches show percentages of the SH-like value for the ML analysis and bootstrap support with 1000 repetitions for a Bayesian analysis and Neighbor-joining analysis. Acropora-associated Zanclea samples are highlighted in blue, other Scleractinia-associated hydroids are in green, and other available Zanclea species are in red. Nodes supporting the clade including Acropora-associated hydroids, all Scleractinia-associated hydroids, and all Zanclea species are respectively highlighted in blue, green, and red.
Table 2.
Information regarding different Acropora species (and other members of the Acroporidae) collected from different locations, and analyzed for the presence of hydroids.
Table 3.
Intra- and interspecific estimates of evolutionary divergence between Scleractinia-associated Zanclea and other species, expressed as the pairwise distance based on 16S markers.
Table 4.
Intra- and interspecific estimates of evolutionary divergence between Scleractinia-associated Zanclea and other species, expressed as the pairwise distance based on 28S markers.