Achromadora Cobb, 1913
(from Goodey, 1963)
Definition: Cyatholaiminae. Very close to Cyatholaimus. Cuticle
with transverse striae bearing rows of punctations. Amphids
spiral, situated just behind level of base of stoma. Head not offset, rather
rounded in front, with 6 indistinct lips each with a small apical papilla.
At base of lips a circlet of 10 cephalic setae,2 lateral, 4 subdorsal and
4 subventral. Stoma rather funnel-shaped, with a prominent dorsal
tooth medially placed and 1 or 2 smaller subventral teeth situated
futher back. Oesophagus
cylindrical for the most part but slightly swollen and rounded terminally
forming a pseudo-bulb.
to end, caudal glands and terminal duct present. Vulva
equatorial; gonads paired, opposed, reflexed. The male of A. granulata
(Cobb) with paired spicules and a large gubernaculum about 2/3 as long
as spicules and bearing large lateral expansions.
Ecology: Micoletzky (1925) mentions that A. ruricola feeds
on blue-green algae, green algae, and diatoms; the other species occur
either in moist soil or freshwater, A. pseudomicoletzky was found
in soil amongst geranium roots.
Type species: Achromadora ruricola (de Man, 1880) Micoletzky,
Species found: at:
TOP Notes: Cobb (1913) mentions the species A. minima = A.
ruricola, is probably found in all parts of the world. He says he knows
of species from Australia, Fiji, and various parts of the United States.
granulatus = A. granulata was found about the roots of aquatic plants
by the Potomac River, Arlington, Virginia. He mentions another species
found in Long Key, Florida.
We have recovered Achromadora spp. in low numbers from soils
of Nine-mile Prairie and Konza Prairie.