ABSTRACT
The present paper deals with some mono saccate pollen grains isolated from core samples obtained from "Borehole" near Jhang, Pakistan. Most of the grains have been recorded by Balme (1970) Twenty Two mono saccate pollen were isolated and described. Most Probably these grains belong to permian era.
PDF Abstract XML References Citation
How to cite this article
DOI: 10.3923/pjbs.2000.191.192
URL: https://scialert.net/abstract/?doi=pjbs.2000.191.192
Palaeozoic micro flora from Pakistan is very fragmentary. The 1st record of bisaccate pollen from Khathwai, central salt range Punjab was made by Chinna-Virkki (1937) and Masood (1983) described a no of monosaccate pollen grains from Gondwana of Salt Range, Pakistan, Monosaccate Pollen grains are not avaibable in any published form except Jain and Sah (1969) who desribed a few monosaccate grains Pram Jurassic of Nammal Gorge, Salt Range, Pakistan. Thus the information regarding the microflora of palaeozic, in particular concerning Pakistan, is very meagre. Geological Survey of Pakistan provided the material which tempted the writer to investigate its Palynologically.
The geological formation of Pakistan have wholly or partially been formulated Palaeontologically. Some have authentic reports and some deposits are still to be explored in the right direction. Khan (1996) and Khurshid (1995) has described mono-Saccate pollen grains from permian era obtained from Borehole near Jhang, Punjab, Pakistan. Geological survey of Pakistan make a Borehole at Jhang upto the Depth of 2368 ft. The core samples were provided to the writer for investigation. The Samples were treated with 40 percent hydroflouric acid at room temp. upto 3 weeks, a small quantity of HCI was also added. The residue was Oxidized in fuming nitric acid for 24 hours. It was washed and heavy liquid separation was given to float off the orgainic material as recommended by Riley (1974) Terminolgy was borrfowed from Hart (1964).
Systematic DescriptionAnteturma: | Pollenites H. (Potonic and Sah, 1960) |
Turma: | Saccites (Erdtmann, 1947) |
Subturma: | Mono Saccites (Cbitaley) (Potonic and Kremp, 1954) |
Infraturma: | Tribtisuccites (Leschik, 1956) |
Genus: | StrimonoSaccites (Bharadwaj, 1962) emended (Hart, 1964) |
Strimonosaccites punjabensis sp. Nov.
Diagnosis: Miospore, monosaccate, diapolesaccites oval in appearance, central body oval to subtraingular, Dearing number of spherical bodies of unknown nature. Each of the body is granulated. They are packed to form a network on the body as well as on the saccus. Germinal aperture absent. Saccus overlapping clearly define saccus uniformly spread (Fig. 1).
Description: Miospore, monosaccate, oval, central body will distinct bearing a number of spherical bodies which are granulated. They form network both on body as well as on the saccus.
Dimension:
Specimen counted: 22, Equatorial diameter 108.9 (135.5) 167.3 um.
Striomonosaccites ovatus Bharadwaj (1962) in Hart (1964) Fig. 226, p.96 except the peculiar spherical network present on the proximal surface of the species. This feature is not given in the diagnosis for the genus. However, 22 species of this kind was isolated and has been assigned to Striomonosaccites punjabensis sp. nov.
These specimen are found at the depth of 2318 ft.
Genus:Cannanorapollis (Potonic and Sah, 1960)
Type species:Cannoropolis janalcil (Potonic and Sah, 1960)
Cannoropollis obscrus (Lele) (Bose and Maheshwari, 1968)
1964: | Parasaccities sp. of (Bharadwaj and Tiwari, 1964) P1. 1, Fig. 2 |
1964: | Virikkipollenites obscrus, Lele, p. 160-161, P1.2, Fig. 17-18 |
1964: | Parasaccites distinctus (Tiwari, 1964) p.163, P1.4, Fig. 76-77 |
1968: | Cannaropollis obscrus (Lele) (Bose and Maheshwari, 1968) p. 32, P 1.5, Fig. 2 |
Holotype: | Cannoropollis obscrus (Lele) (Bose and Maheshwari, 1968) P1.5, Fig. 2 |
Description: Pollen grain, monosaccate, trilete marking ill defined, amb circular to broadly oval, central body circular to oval Laesurae simple, covers 1/2 of the central body, exoexine of the C.B. Infrareticulate. Thin with number of exinal folds. Saccus attachment equatorial on proximal surface, subequatorial on distal surface. Saccus 1-2 um thick, exoexine of saccus. Infrareticulate brochi 0.5-1.0 um in diameter, margin of the saccus undulating.
Dimension: Specimen counted: 3, Equatorial diameter: 112.2 (112.1) 115.5 um.
Comparison: This palynomorph resembles closely with Cannoropollis obscrus (Lele) Bose and Maheshwari (1968), P1.5, Fig. 2 in morphological details and size range.These specimen are fund at the depth of 2327 ft. and belong to permian era.
Fig. 1: | Stlionionosaccate ovatus |
Fig. 2: | Cannanoropollis obscurus |
Many monosaccate pollen grains have been described. Most of these grains have easily been assignable to well established genera like Cannanoropollis, Striomonosaccites, Plicatipollenites. It is interesting to note that Bose and Maheshwari (1968) have regarded Virkipollenites as a junior synonym of Cannanoropollis. Hart (1969) has regarded Virkipollenites and Cannoropolfis as thejunlo synonyms of Cordaitina.
REFERENCES
- Chinna-Virkki, 1937. On the occurrence of winged spores in the Lower Gondwana rocks of India and Australia. Proc. Indian Acad. Sci. Sect. B, 6: 428-431.
Direct Link