|  |  |  | Neoophora | ||||||
---|---|---|---|---|---|---|---|---|---|---|
 |  |  |  |  |  |  |  | Adiaphanida | ||
 | Catenulida | Macrostomorpha | Polycladida | Lecithoepitheliata | Proseriata | Bothrioplanida | Rhabdocoela | Fecampiida | Prolecithophora | Tricladida |
Egg | Entolecithal | Entolecithal | Entolecithal | Ectolecithal | Ectolecithal | Ectolecithal | Ectolecithal | Ectolecithal | Ectolecithal | Ectolecithal |
Cleavage | Spiral (early) | Spiral (early) | Spiral | Spiral | Spiral (early) | Disperse | Irregular | Irregular | Disperse | Disperse |
Specificationa | ? | Emb. blast. | Mosaic | Emb. blast. | Emb. blast. | Emb. blast. | Emb. blast. | Emb. blast. | Emb. blast. | Emb. blast. |
Mesentoblast | ? | - | 4d2 | 4d | - | ? | - | ? | - | - |
Gastrulation | ? | Inverse epiboly (kind of) | Epiboly | Epiboly | Modified epiboly | - | Epiboly (kind of) | "Invagination" | Inverse epiboly (some) | - |
Hull membraneb | ? | Yes | - | Yes | Yes | Yes | Variable | - | Variable | Yes |
Blastopore | ? | ? | Yes | Yes | Yes | - | - | - | - | - |
Emb. Pharynxc | ? | - | - | - | - | - | - | - | - | Yes |
AP axisd | ? | An-Veg | modified An-Veg | ? | ? | ? | ? | ? | ? | ? |
DV axise | ? | ? | AB quad. ventral, CD quad. dorsal | An-Veg | An-Veg | ? | ? | ? | ? | ? |
LR axisf | ? | ? | BC quad. right, AD quad. left | ? | ? | ? | ? | ? | ? | ? |
Larva | Juvenile described as "larva" | - | Yes | - | - | - | - | Juvenile described as "larva" | - | Embryo described as "larva" |