Do annelids have trochophore larvae 4. Open Author. Apr 26, 2024 ยท No, platyhelminthes do not have a trochophore larval stage. Thus, both annelids and mollusks have an immature larval stage. Bristle worm larvae in the earliest stage, the trochophore, look like a ball around 0. The spiralian cleavage pattern has been lost in the cephalopods, which have a discoidal cleavage. 2. We wanted to sample larvae at the trochophore stage as this has been homologized to the trochophore larva of annelids . The annelid larval form is called the trochophore larva. The body plan includes a foot, visceral mass, and mantle. pbfhfnkdmxswktumqpjqpwlhvhfsxgclvsktaqukgptnuysfoybwgoqprxuecqvryjectphtfxxdgx