Last modified Sep. 16, 2000
FAMILY TRIPLOPORELLACEAE
TRIBE THYRSOPORELLEAE
GENUS Placklesia BILGÜTAY 1968
SPECIES Placklesia multipora BILGÜTAY 1968
(by Anonymous)
1. Synonymy list
1968 Placklesia multipora n. gen. n. sp.- Bilgütay, Fig. 4.a-b ; Pl. III, fig. 1-9
1968 (?) Physoporella minutula.- Bilgütay, Pl. III, fig. 10
1976 Placklesia multipora.- Tollmann, Fig. 171
1980 Placklesia multipora.- Senowbari-Daryan, Pl. 12, fig. 5-6
1993 Placklesia multipora.- Senowbari-Daryan & E. Flügel, Pl. 11, fig. 3-4
2. Types
Holotype :
Pl. III, fig. 8, thin section N° 0321, Geologische Bundesantalt, Wien (Austria)
paratypes : thin
sections N° 0322-0329 (figured paratypes) & 330 (not figures paratypes), Geologische Bundesantalt, Wien (Austria)
Type locality: A/6 locality (Küpper, 1963, Exkursion zur Hohen Wand in den Kalkalpen südlich von Wien. Verh. Geol. B.-A., Sonderh F, Wien, p.9-19), Plackles, Hohe Wand, NNE Grünbach am Schneeberg, W Wiener Neustadt, Niederösterreich (Austria)
Stratum typicum: brown marly limestone and dark shales of Rhaetian age.
Original diagnosis: (none).
Longitudinal (a) and transverse (b-c) sections (Bilgütay, 1968, Fig. 4)
4. Description
Original description
(Bilgütay, 1968): « Thallus composed of segments which measure 1-2.2 mm. in length and 0.8 to 1.6 mm. in thickness.
Text fig. 3 shows all measurements which were made from selected segments. Each segment contains a cylindrical central stem
(about 1/2-1/3 diameter of thallus), from which 6 primary branches emerge. Primary branches are perpendicular to the central
stem at the center and proximal side, but oblique at the distal sides of the segments, and arranged in regular whorls which are
alternating at different levels. Each segment contains 3-5 whorls which are spaced (from one
1st order pore to the next)
0.144-0.176 mm. The distance from the center of one primary pore to the center of the superimposed next one measures
0.304-0.176 mm. Primary branches are short and start with large pores at the central cavity. The diameter of these pores
are 0.144 to 0.160 mm. and each whorl consists of 6 primary pores which are spaced 0.096 to 0.112 mm.
The bifurcations of the branches take place in the above mentioned manner and with 5 times branching they build a canal
system through the rather strong calcareous wall and open with 128 small, fifth pores, which are about 0.016 to 0.029 mm.
in diameter. Text fig. 44 (sic) shows the branching system in longitudinal and transversal sections. The measurements of
Plancklesia (sic) multipora are seen in text fig. 5. »
Measurements:
Original measurements from the segments in mm (Bilgütay, 1968, Fig. 3):
|
L |
2,20 |
2,12 |
1,80 |
1,80 |
1,80 |
1,76 |
1,76 |
1,68 |
1,68 |
1,68 |
1,60 |
|
D |
1,32 |
1,44 |
1,16 |
0,92 |
1,00 |
1,20 |
1,00 |
1,16 |
1,52 |
1,28 |
1,32 |
|
1,08 |
1,16 |
|
|
|
|
|
|
|
|
|
|
|
L |
1,60 |
1,52 |
1,52 |
1,48 |
1,44 |
1,32 |
1,28 |
1,24 |
1,20 |
1,00 |
1,00 |
|
D |
1,20 |
1,20 |
1,60 |
0,80 |
0,96 |
0,96 |
1,28 |
1,36 |
1,20 |
1,16 |
1,16 |
|
|
|
1,04 |
1,00 |
0,80 |
|
|
|
|
|
1,00 |
|
Original measurements in mm (Bilgütay, 1968, Fig. 5)
|
|
Longitudinal sections |
Transversal sections |
Tangential section |
|||||||
|
L |
1,509 |
1,435 |
0,705 |
0,902 |
1,332 |
1,480 |
counted 6 pores |
|
|
|
|
D |
1,036 |
1,184 |
1,036 |
1,036 |
1,332 |
1,110 |
1,050 |
1,036 |
|
|
|
d |
0,444 |
0,325 |
0,370 |
|
0,444 |
0,399 |
0,444 |
0,444 |
|
|
|
St |
0,222 |
0,370 |
0,325 |
|
0,444 |
0,355 |
0,296 |
0,296 |
|
|
|
pi |
0,236 |
0,133 |
0,148 |
0,118 |
0,152 |
0,133 |
0,148-0,222 |
0,133 |
0,251-0,281 |
|
|
pii |
|
|
|
|
|
|
0,103-0,088 |
0,074-0,088 |
0,133-0,148 |
|
|
piii |
0,088 |
0,088 |
0,088 |
0,059 |
0,103 |
0,074 |
0,059-0,074 |
0,059 |
0,103 |
|
|
piv |
0,059 |
0,059 |
0,059 |
0,044 |
0,074 |
0,059 |
0,044-0,059 |
0,044 |
0,059-0,074 |
|
|
pv |
0,029 |
0,029 |
0,029 |
0,029 |
0,029 |
0,029 |
0,029 |
0,014 |
0,029-0,044 |
|
5. Remarks
(none).
6. Stratigraphic range
Rhaetian (Bilgütay, 1968; Tollmann, 1976; Senowbari-Daryan, 1980; Senowbari-Daryan & E. Flügel, 1993)
7. Real distribution
Austria (Bilgütay, 1968; Tollmann, 1976; Senowbari-Daryan, 1980; Senowbari-Daryan & E. Flügel, 1993)
8. Paleoecology
(.).
