Turbellarian taxonomic database

Oxyposthia praedator Notes

Ivanov AV 1952 (citation)- p 43, figure 4- anterior end from the dorsal side.  Also, long
	description with histology, p 1-82.  Diagnosis:
		1.  Presence of separate tubular organ- tactile sensilla.
		2.  Many celled.
		
	Also, variety- Oxyposthia praedator rubra, p 52.	
		
Ax P 1961 (citation)- illustration of histology of.
Ax P 1963 (citation)- notes excellent histological studies by Ivanov.  2 different types of phagocytes
	here.  gives illustration of muscle cells, phagocytes etc. p 195.
	
Dorjes J 1968 (citation)- lists.
Beklemischev VN 1969 (citation)-  on parenchyma in p 5-8 II, etc.  uses this for example all
	thru discussion.
	
Apelt G 1969 (citation)- p 268, notes work on reproduction by Ivanov AV 1952 (citation).
Antonius A 1970 (citation)- sense organs on ventral side of.
Mamkaev YuV, Markosova TG 1979 (citation)- Electron microscopy study on parenchyma- all types in.
	plate fig 1-12 and fig 24 p 10.

Smith JPS 1981 (citation)- mentions electron microscopy by Ivanov and Mamkaev.
Markosova TG 1986 (citation)- Electron microscopy of gut.
[from Ivanov 1952 (citation), p. 41; transl. by A. Petrov] &emdash; O. pr. occurs along the coasts of the southwestern Sachalin, commonly in the shallow coastal zone (1-2 m) on sandy or silty substrate, overgrown with Zostera (and with an infusion of Sargassum and other seaweeds). Ablution of Sargassum samples yielded especially abundant specimens---the seaweed abounded in different turbellarians. However, Oxyposthia was also found at the very water's edge by abluting gravel from among the rhizoids in the Laminaria zone. 
Gureeva MA, Mamkaev YuV 1989 (citation)- p 13, "The certain primitive characters have been observed in embryonal
development of O. praedator: 1) the germ-layers formation is a continuing in time cellular delamination; 2)
the internal germ-layer is a uniform parenchyma individed in entoderm and mesoderm; 3) the archenteron is
absent.  these primitive characters are combined with the specialized features, such as the size distinctions
between blastomeres in egg-cleavage and the early determination of dopso-ventral polarity."
Mamkaev YuV, Markosova TG 1979 (citation)- "Electron microscopic studies of the parenchyma in some
representatives
of the Acoela."  Species studied include:
     Oxyposthia praedator
     Convoluta convoluta
     Anaperus biaculeatus
     
 [translated summary "...differentiation of the secretory cells of the epidermal glands in the parenchyma,
and the presence of muscular and nervous elements in the epidermal layer, leads to the conclusion that in
the
Acoela there is a close interrelation between the parenchyma and the epidermis, and that phagocytoblast and
kinoblast are still poorly separated."]

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