. Bulletin of the Natural Histort Museum. Geology series. LOWER CARBONIFEROUS BRYOZOA 127. Fig. 15 Pseudonematopora planatiis sp. nov. Line drawing of external features of BMNH PD9450: scale bar = 1 mm. idge developed between adjacent autozooecial rows. On the reverse >urface the interapertural areas are slightly wider than those on the l)bverse surface. A strong ridge may be developed there. Autozooecial apertures are small and circular. The apertures of |he autozooecia adjacent to the reverse surface are divergent from it Fig. 11) and are marginally larger than those in other rows on the
. Bulletin of the Natural Histort Museum. Geology series. LOWER CARBONIFEROUS BRYOZOA 127. Fig. 15 Pseudonematopora planatiis sp. nov. Line drawing of external features of BMNH PD9450: scale bar = 1 mm. idge developed between adjacent autozooecial rows. On the reverse >urface the interapertural areas are slightly wider than those on the l)bverse surface. A strong ridge may be developed there. Autozooecial apertures are small and circular. The apertures of |he autozooecia adjacent to the reverse surface are divergent from it Fig. 11) and are marginally larger than those in other rows on the )bverse surface. Peristomes, situated proximally, are commonly ieveloped around apertures. Thin terminal diaphragms close off ome autozooecial apertures, behind which small circular brown )odies are found in chambers (Fig. 13b).These brown bodies, which \re similar in morphology to those reported by Morrison & Anstey '1979) in some Ordovician trepostomes, represent the degenerated emains of the polypide soft tissues. 'able 5 Measurements of Pseudonematopora planatus (in mm). N=13. NM Mn Mx CVw CVb !W iS2 2 kR 130 130 130 130 130 130 13 3 6 5 8 Discussion. Pseudonematopora is reported from outside the CIS former Soviet Union) for the first time. In the County Fermanagh iuna P. planatus is quite common. Only three other species have reviously been recorded, all from Lower Carboniferous strata: P. \etchorensis Gorjunova, 1985, the type species P. turkestanica (Nikiforova, 1948) [Balakin, 1974], and P. halakini Gorjunova, 1988. P. planatus differs from these three species in a number of respects. Zoarial width is narrower in P. turkestanica and the number of autozooecial rows is less. More importantly the autozooecial apertures in P. planatus are at least half the size as those of the other three species. Skeletal cysts are a
Size: 799px × 3127px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookc, bookcentury1900, bookcollectionbiodiversity
