Habitat.—Surface of the nematodes Hammerschmidtiella diesingi and Leidynema appendiculata in Periplaneta americana, U.S.A. (Hoffman, 1952, 1953): Eighteen percent of 192 nematodes found in 52 adult cockroaches were infected with the bacterium.
Order CARYOPHANALES
Family ARTHROMITACEAE
Arthromitus intestinalis (Valentin) Peshkoff
Synonymy.—Hygrocrocis intestinalis.
Habitat.—Blatta orientalis, Europe (Valentin, 1836; Robin, 1847, 1853; Peshkoff, 1940): Isolated from intestinal tract. The organism appears as fragments in fecal masses or as fibers adhering to the mucous membrane of the large intestine (Robin, 1853).
Cockroach, France? (Chatton and Pérard, 1913).
Order SPIROCHAETALES
Family SPIROCHAETACEAE