Back
Odontochitina kashiense
Odontochitina kashiensis He Chengquan, 1991
Holotype: He Chengquan, 1991, pl.6, fig.14
Age: Turonian
Description by He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: cyst cornucavate, outline angular-algae (I DON’T UNDERSTAND THIS CHINESE), body nearly round. Due to the archeopyle developed well, we did not find a complete specimen. There are three long horns, froming by the extending from the outer wall and tapering, the base of the horn is not connected to the body cavity; the horn located on the operculum is the apical horn, straight, length 90-92.5μm, top cut shape (may be related to the fracture); two antapical horns nearly have the same length, more or less curved, slightly different shape, length 100μm or so, one of these curves into an ivory, inclines to the posterior lateral side, may also be the back waist angle; In the middle of each horn, the outer wall possesses two rows of vertical regular small piercing, about more than 20 in each row, the size and shape of the holes are variable, oval or round square-circular, the larger ones about 3μm × 2μm. In addition to the holes, the cyst wall surface is smooth. The outline of the inner body is consistent with the body, and only at the base of the horns is clearly separated from the outer wall, the inner body surface is usually slightly rough or nearly smooth. The archeopyle quite developed, apical type, its edge is rounded-angular. Operculum with the apical horn always fall off.
Holotype length (not including the operculum) 145μm, body width 70μm; operculum with horn length 113-120μm.
Comparison: The new species is distinguished from Odontochitina operculata for each corner is pierced; It is distinguished from O. costata and O. striatoperforata for lacking of true longitudinal stripes on the horn surface, holes only develop in the middle of the horns, and its coarse grainy surface of the inner body. It is distinguished from O. porifera for the shape of the horns (such as the posterior horn ivory) and the horns with only two rows of holes, the latter’s horns are more or less swollen and with rows of piercing, in particular, theapical horn is almost completely perforated.
Location and stratigraphy: UlugqatCounty Basebulak, upper Kukebai fm.
Holotype: He Chengquan, 1991, pl.6, fig.14
Age: Turonian
Description by He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: cyst cornucavate, outline angular-algae (I DON’T UNDERSTAND THIS CHINESE), body nearly round. Due to the archeopyle developed well, we did not find a complete specimen. There are three long horns, froming by the extending from the outer wall and tapering, the base of the horn is not connected to the body cavity; the horn located on the operculum is the apical horn, straight, length 90-92.5μm, top cut shape (may be related to the fracture); two antapical horns nearly have the same length, more or less curved, slightly different shape, length 100μm or so, one of these curves into an ivory, inclines to the posterior lateral side, may also be the back waist angle; In the middle of each horn, the outer wall possesses two rows of vertical regular small piercing, about more than 20 in each row, the size and shape of the holes are variable, oval or round square-circular, the larger ones about 3μm × 2μm. In addition to the holes, the cyst wall surface is smooth. The outline of the inner body is consistent with the body, and only at the base of the horns is clearly separated from the outer wall, the inner body surface is usually slightly rough or nearly smooth. The archeopyle quite developed, apical type, its edge is rounded-angular. Operculum with the apical horn always fall off.
Holotype length (not including the operculum) 145μm, body width 70μm; operculum with horn length 113-120μm.
Comparison: The new species is distinguished from Odontochitina operculata for each corner is pierced; It is distinguished from O. costata and O. striatoperforata for lacking of true longitudinal stripes on the horn surface, holes only develop in the middle of the horns, and its coarse grainy surface of the inner body. It is distinguished from O. porifera for the shape of the horns (such as the posterior horn ivory) and the horns with only two rows of holes, the latter’s horns are more or less swollen and with rows of piercing, in particular, theapical horn is almost completely perforated.
Location and stratigraphy: UlugqatCounty Basebulak, upper Kukebai fm.