Micropalaeosoma

Micropalaeosoma; Temporal range: Eocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Rhabditophora
Order:	Rhabdocoela
Suborder:	Typhloplanoida
Genus:	Micropalaeosoma ; Poinar, 2004
Type species
	Micropalaeosoma balticus; (Poinar, 2003)

Micropalaeosoma balticus (formerly Palaeosoma balticus[lower-alpha 1]) is an extinct, fossil turbellarian flatworm known from Baltic amber of Kaliningrad, Russia, that lived approximately 40 million years ago. It measured approximately 1.5 mm in length and is the oldest and most complete flatworm fossil yet discovered.[1][2]

References

The name Palaeosoma was preoccupied by a genus of fossil millipedes.

Poinar, George (2003). "A rhabdocoel turbellarian (Platyhelminthes, Typhloplanoida) in Baltic amber with a review of fossil and sub-fossil platyhelminths" (PDF). Invertebrate Biology. 122 (4): 308–312. doi:10.1111/j.1744-7410.2003.tb00095.x.
Poinar, George O. (2011). "Eggs, Oviposition, and Maternal Care in Amber". In Arthur J. Boucot; George O. Poinar, Jr. (eds.). Fossil Behavior Compendium. CRC Press. ISBN 9781439859230.

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[1] The name Palaeosoma was preoccupied by a genus of fossil millipedes.

[Poinar2003-2] Poinar, George (2003). "A rhabdocoel turbellarian (Platyhelminthes, Typhloplanoida) in Baltic amber with a review of fossil and sub-fossil platyhelminths" (PDF). Invertebrate Biology. 122 (4): 308–312. doi:10.1111/j.1744-7410.2003.tb00095.x.

[3] Poinar, George O. (2011). "Eggs, Oviposition, and Maternal Care in Amber". In Arthur J. Boucot; George O. Poinar, Jr. (eds.). Fossil Behavior Compendium. CRC Press. ISBN 9781439859230.