Flatworms number among the most diverse invertebrate phyla and represent the most
biomedically significant branch of the major bilaterian clade Spiralia, but to date, deep …

Polyclad flatworms offer an excellent system with which to explore the evolution of larval
structures and the ecological and developmental mechanisms driving flatworm and marine …

Many animals undergo indirect development, where their embryogenesis produces an
intermediate life stage, or larva, that is often free‐living and later metamorphoses into an …

The tiger flatworm Prostheceraeus crozieri (Polycladida) develops via an eight‐lobed, and
three‐eyed planktonic Müller's larva. This larva has an apical organ, ultrastructural details of …

Using 28S ribosomal DNA sequences, we inferred the internal relationships of the order
Polycladida. We identified morphological characters for clade support when possible …

Animals detect light using opsin photopigments. Xenopsin, a recently classified subtype of
opsin, challenges our views on opsin and photoreceptor evolution. Originally thought to …

Background Selective plane illumination microscopy (SPIM a type of light-sheet microscopy)
involves focusing a thin sheet of laser light through a specimen at right angles to the …

Porphyrias are disorders of heme metabolism frequently characterized by extreme
photosensitivity. This symptom results from accumulation of porphyrins, tetrapyrrole …

Flatworms exhibit huge diversity in their reproductive biology, making this group an excellent
model system for exploring how differences among species in reproductive ecology are …

The intersection of development and evolution has always harbored conceptual issues, but
many of these are on display in contemporary evolutionary developmental biology (evo …