Gene Expression Patterns in Brachiopod Larvae Refute the "Brachiopod-Fold" Hypothesis - PubMed (original) (raw)

Gene Expression Patterns in Brachiopod Larvae Refute the "Brachiopod-Fold" Hypothesis

Andreas Altenburger et al. Front Cell Dev Biol. 2017.

No abstract available

Keywords: Brachiopoda; body plan; brachiopod fold; evolution; gene expression; ontogeny.

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Figures

Figure 1

Figure 1

(A) Brachiopod lifecycle. Brachiopoda have three larval types. Rhynchonelliform larva are lecithotrophic with three larval lobes, craniiform larvae are lecithotrophic with two larval lobes, and linguliform larva are planktotrophic (for a detailed review of brachiopod development see Santagata, 2015). (B) Illustration of the brachiopod fold hypothesis redrawn after Cohen et al. (2003). 1. shows a hypothetical brachiopod with ventral and dorsal valve, anterior and posterior orientation. 2. According to the brachiopod fold hypothesis both valves are dorsal, one anterior and one posterior. (C) Gene expression patterns of “anterior” and “posterior” genes in lecithotrophic brachiopod larva redrawn after (Martín-Durán et al., 2016). Abbreviations: al, apical lobe; anl, anterior lobe; dv, dorsal valve; jv, juvenile valve; ml, mantle lobe; pl, pedicle lobe; pol, posterior lobe; se, setae; vv, ventral valve.

References

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