Dinobryon Ehrenberg

[ref. ID; 1618]
Solitary or colonial; individuals with vase-like, hyaline, but sometimes, yellowish cellulose test, drawn out at its base; elongated and attached to the base of test with its attenuated posterior tip; 1-2 lateral chromatophores; usually with a stigma; asexual reproduction by binary fission; one of the daughter individuals leaving test as a swarmer, to form a new one; in colonial forms daughter individuals remain attached to the inner margin of aperture of parent test and there secrete new tests; encystment common; the spherical cysts possess a short process; fresh water. (ref. ID; 1618)

[ref. ID; 3490]
The cells having a companulate lorica are free or epiphytic and solitary or forming a branching colony. There are usually two elongate chromatophores, one contractile vacuole and a single eye-spot in the fusiform cell tapering to a cytoplasmic stalk in the distal portion with which the cell attaches to the posterior region of the hyaline lorica. (ref. ID; 3490)


Dinobryon cylindricum Imhof (ref. ID; 3490)
Description; The species having an elongate cylindrical lorica. (ref. ID; 3490)
Measurements; 60-100 um in length and 10 um in oral diameter. (ref. ID; 3490)
Dinobryon divergens Imhof (ref. ID; 1618, 3490, 3703)
Description; Great variation in different localities. (ref. ID; 1618)
Being 37-40 um in length of the lorica having two characteristic expansions in the median part. (ref. ID; 3490)
Measurements; 26-65 um long. (ref. ID; 1618)
Dinobryon sertularia Ehrenberg (ref. ID; 1618, 3490, 3703)
Measurements; 23-43 by 10-14 um. (ref. ID; 1618)
Dinobryon stipitatum Stein (ref. ID; 3490)
Description; The lorica is long and straight with a slender tapering portion. (ref. ID; 3490)
Measurements; The size is 55-60 um in length and 8-10 um in oral diameter. (ref. ID; 3490)