1990b; Megri 1993) with subzonal
divisions, the authors applied zonal model processes to the COMIS computer program to produce COMIS with subzones (CWSZ) (Stewart and Ren 2006).
insemination for the alleviation of infertility.
The lower boundary of that formation coincides well with the level of the last occurrence of the subzonal
chitinozoan Acanthochitina barbata Eisenack (see Hints et al.
Upwards in the section the subzonal
species Baltoplacognathus robustus was found in the Stirnas Formation at 387.
Partial zona dissection or subzonal
sperm insertion: microsurgical fertilization alternatives based on evaluation of sperm and embryo morphology.
At least 11 biostratigraphical horizons, including the subzonal
boundaries of the Laufeldochitina striata Zone, can be distinguished within the studied interval.
42) in the limits of the Fungochitina spinifera Zone (in the middle part of the Vormsi Stage) and (2) the appearance of the subzonal
Acanthochitina barbata (found, however, only in sample No.