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These flatworms are benthic and diurnal. Because of their aposematic colors, they have no fear to crawl around to feed. Pseudoceros ferrugineus feeds on various colonial ascidians .
Catenulida is an order of flatworms in the classical classification, or a class of flatworms in a phylogenetic approach. [2] They are relatively small free-living flatworms, inhabiting freshwater and marine environments. There are about 100 species described worldwide, but the simple anatomy makes species distinction problematic. [2]
Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial environments, such as leaf litter. Cestodes (tapeworms) and trematodes (flukes) have complex life-cycles, with mature stages that live as parasites in the digestive systems of fish or land vertebrates , and intermediate stages that infest secondary hosts.
Pseudoceros are simultaneous hermaphrodites [9] and reproduce sexually via random hypodermic insemination through the body tissue. [10] These organisms participate in penis fencing, [9] which is a behavior where the flatworms use their extended penises to stab and inseminate the other, while avoiding becoming inseminated themselves.
The female antrum is deep and wide with a narrow and short vagina surrounded by the cement glands." [1] ... "Marine Flatworms",CSIRO publishing,2003,ISBN ...
Each worm also has proglottids, which are wider segments of the tapeworm that contains both male and female reproductive organs. [1] Each mature segment has unilateral genital pores and 3 testes. When the eggs have been fertilized the segments are referred to as gravid.
The divided flatworm can reproduce both asexually, by dividing itself, and sexually. The species is a hermaphrodite, meaning that they have both male and female reproductive organs. When two flatworms reproduce they battle to decide who gets to fertilize and who is fertilized. The winner gets to act as the male, fertilizing the other. [1]
Cratera hina is a flatworm that can reach up to 60 mm in length. The dorsal side of the body consists of a lateral black band on each side of the body and a median orange band. The dorsal side of the body consists of a lateral black band on each side of the body and a median orange band.