Phylum Fungilli [ 215 



Order 5. Schizogregarinida Calkins Biol. Prot. 433 (1926). 

 Amoebosporidies Schneider. 



Amoebosporidia Labbe in Thierreich 5: 120 (1899). 

 Suborder ^mo^feo^/^oncfm Doflein Protozoan 171 (1901). 

 ^iuhordev Schizocystinea Poche in Arch. Prot. 30: 233 (1913). 

 Suborder Schizogregarinaria Reichenow in Doflein Lehrb. Prot. ed. 5, 3 : 872 



(1929). 

 Orders Archegregarina and Neogregarina Grasse Traite Zool. 1, fasc. 2: 622, 

 665 (1953). 

 The Sporozoa previously considered, particularly those of the first two orders, are 

 called coccidians; those of the present order and the two which follow are called 

 gregarines. The latter are characterized (not without exceptions) by inter- instead 

 of intra-cellular active stages, and by the production of numerous gametes, alike or 

 not strongly differentiated, from paired scarcely differentiated gametocytes. The 

 present order includes the gregarines which exhibit asexual reproduction. They are 

 a rather miscellaneous assemblage. 



Family 1. Schizocystida [Schizocystidae] Leger and Duboscq in Arch. Prot. 12: 

 102 (1908). Family Monoschizae V^eiser in ]our. Protozool. 2: 10 (1955), including 

 the two following families. In marine worms and other invertebrates. The sporozoites 

 enlarge in the host and become multinucleate individuals which reproduce freely by 

 producing uninucleate buds. Some of these buds continue the infection directly; 

 others become attached in pairs, each pair secreting a common cyst wall. Each of the 

 individuals in the cyst become multinucleate and buds off numerous uninucleate 

 gametes. The zygotes become walled spores which are cast out with the feces of the 

 host, to infect others which ingest them. Each produces eight sporozoites. Schizo- 

 cystis, Siedleckia. 



Family 2. Seleniida [Seleniidae] Brasil in Arch. Prot. 8: 394 (1907). In marine 

 worms. Vegetative individuals notably long and slender; spores spiny, with four 

 sporozoites. Selenidiu7n, Meroselenidium. 



Family 3. Merogregarinida [Merogregarinidae] Fantham 1908. Family Caul- 

 leryellidae Keilin. Merogregarina, Caulleryella, Tipulocystis. 



Family 4. Spirocystida [Spirocystidae] Calkins Biol. Prot. 435 (1925). Family 

 Spirocystidees Leger and Duboscq in Arch. Prot. 35: 210 (1915). In earthworms. 

 Spores containing a solitary sporozoite which escapes through a pore. Spirocystis. 



Family 5. Ophryocystida [Ophryocystidae] Leger and Duboscq in Arch. Prot. 12: 

 102 (1908). Family Amoebosporidiidae Brasil (1907), not based on a generic name. 

 Family Dischizac Weiser in Jour. Protozool 2: 10 (1955). In Ophryocystis Schneider 

 (Leger, 1907), the vegetative individuals, attached to the walls of the Malpighian 

 tubules of beetles, grow and become multinucleate and send out branches whose ends 

 develop into additional individuals. Eventually, different individuals become at- 

 tached in pairs. Each of these individuals buds off a single uninucleate gamete. The 

 remaining protoplasm of the gametocytes forms a protective sheath around the zygote, 

 which becomes a single spore with eight sporozoites. 



Order 6. Monocystidea Biitschli in Bronn Kl. u. Ord. Thierreichs 1: 574 (1882). 



Order Haplocyta Lankester in Enc. Brit. ed. 9, 19: 853 (1885). 



Suborder Acephalina Labbe in Thierreich 5 : 37 ( 1899) . 

 Organisms of the character of gregarines, not multiplying asexually, the vegetative 

 individuals not elongate and divided into serial parts. 



