Pseudobiceros bedfordi (Laidlaw, 1903) Faubel 1984
Pseudoceros bedfordi Laidlaw, 1903; Pseudoceros micronesianus Hyman, 1955
Type material location
The location of the type material is unknown but there is a whole mount and a set of serial histological sections of this species deposited at the Queensland Museum in Brisbane, Australia.
The diagnostic characters for this species are the color and color patter. A brown to black background with yellow dots over the entire dorsal surface, and several transverse pink streaks outlined by black.
External anatomy: The background color varies from brown to black with numerous compacted yellow dots over the entire dorsal surface. Numerous transverse pink streaks outlined by black variable in shape. The margin is black with white dots. The ventral side is pink with a black marginal band. The pseudotentacles are formed by the folds of the anterior margin and are pointed ear-like with few pseudotentacular eyes. Two elongated clusters of cerebral eyes close to each other as one single cluster of about 100 eyespots. A small and narrow pharynx with simple folds. Two male pores closed together and the sucker is well separated from gonopores.
Internal anatomy: The male complex consists of two male gonopores, each one leading to an independent male system. Each male systems consists of unbranched vas deferens, a round seminal vesicle connected to a long and coiled ejaculatory duct, a large spherical prostatic vesicle and an extremely long and narrow stylet housed in a shallow and wide antrum. There is a single female system with a shallow antrum and the vagina is surrounded by the cement glands.
Ecology and Distribution
This species has been reported for Heron Island in the Great Barrier Reef, Australia, Madang and Laing Island in Papua New Guinea, and has been also reported for Singapore, Philippines, and Micronesia.
Evolution and Systematics
This species was originally described by Laidlaw (1903) as Pseudoceros bedfordi but after a revision of the cotyleans, Faubel (1984) made the new combination Pseudobiceros bedfordi based on the presence of two male gonopores. Newman & Cannon (1994) included the species into the group 6, characterized by transverse streaks and stripes, according to the categorization, established by the same authors, based on the color and color pattern. Within this group, P. dendrictus and P. flavolineatus are similar to P. bedfordi. However, P. dendrictus has a yellow and brown background, and P. flavolineatus has narrow lines. Pseudoceros micronesianus was described by Hyman (1955) from a damage preserved specimen, but her description completely agrees with the color and color pattern of the alive specimen seen by Newman & Cannon (1994). The authors, based
Hyman, L.H. (1955) Some polyclad flatworms from Polynesia and Micronesia. Proceedings of the United States National Museum, 105: 65-82.
Newman, L.J. & Cannon, L.R.G. (1994) Pseudoceros and Pseudobiceros (Platyhelminthes, Polycladida, Pseudocerotidae) from Eastern Australia and Papua New Guinea. Memoirs of the Queensland Museum, 37: 205–266.
Faubel, A. (1984) The Polycladida, Turbellaria. Proposal and establishment of a new system. Part II. The Cotylea. Mitteilungen des hamburgischen zoologischen Museums und Instituts, 81: 189–259.
- Pseudoceros bedfordi Laidlaw, 1903 (synonym)