context: Sandless turbellaria [1] is a class of animals from the Acoelomorpha subtype of the Xenacoelomorpha type [2] (some taxonomists lower the rank of the Acoela taxon to order [3]), includes about 400 species [4]. Previously considered as a detachment of ciliary worms (Turbellaria) [5]. These are small (up to 9 mm in length) animals that do not have a coelom or intestine. The structure of the intestinal turbellarium includes the epidermis covered with cilia and rich in glands, ring and longitudinal muscles, the nervous system with a primitive brain and the parenchyma, in which the internal organs of the animal are enclosed. The role of the digestive system in these animals is played by central syncytium, in which food is absorbed through phagocytosis. Undigested food debris is discharged through the mouth opening. Intestinal turbellaria have sensory organs, such as statocysts and photoreceptors. These animals have a very complex (usually hermaphroditic) reproductive system. Acoela can reproduce both asexually and sexually, and in the latter case, fertilization is always internal, and offspring development is direct (in rare cases, live birth occurs). In addition, animals from this group have the ability to regenerate, creating two full-fledged individuals from one cut.
question: What is the length of the Pesky Turbellaria?
answers.text: up to 9 mm