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Glaphyrocysta indica
Glaphyrocysta indica Jain and Garg, 1991, p.74,76; pl.4, figs.1-3,7-8,13-16.
Holotype: Jain and Garg, 1991, pl.4, figs.14-16; Fauconnier and Masure, 2004, pl.32, figs.8-9.
Age: Miocene.
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Original description (Jain & Garg, 1991)
Glaphyrocysta indica sp. nov. Pl. 4, figs 1, 2, 3, 7, 8, 13, 14, 15, 16
1985 Cordosphaeridium cracenospinosum Davey & Williams 1966, in Kar, p. 203-204; pl. 48, figs 5, 6.
1985 Cordosphaeridium cantharellum (Brosius) Gocht 1969, in Kar, p. 203; pl. 48, fig. 3.
1985 Cordosphaeridium sp., in Kar, p. 204 ; pl. 49, fig. 7.
Holotype-PI. 4, figs 14-16; Slide no. BSIP 6632; coordinates: 133.5 x 4.6.
Type locality-Aida, Laiyari, Khari Nadi Formation, Kutch (after Kar, 1985, p. 204); Miocene.
Diagnosis-Cyst skolochorate, dorso-ventrally compressed, ambitus circular to oval; autophragm thin, differentially ornamented, smooth to pitted. Process complexes confined along peripheral zone ; mid-dorsal and mid-ventral areas free of processes; individual processes thin, slender, solid, distally commonly branched and joined by petulate to recurved, thin, net-like perforate membrane and thin trabecular strands. Some adjacent process complexes joined by discontinuous perforate membraneous ectophragm. Archaeopyle apical ; paratabulation gonyaulacacean expressed by 4', 6", ?0-3C, 5-6'", lp, ? lps, l"".
Description-Cyst skolochorate, body lenticular, dorsoventrally compressed, circular to oval in out line, autophragm thin, differentially ornamented, smooth along periphery, gradually become dense and unequally pitted to spongy in mid-dorsal and mid-ventral areas. Autophragm gives rise to process complexes which are confined primarily along the marginal areas of the cyst; mid-dorsal and midventral areas are free of processes; processes commonly occur in annulate to arcuate or often linear, intratabular to penitabular complexes with simple or complexly branched stem but a few may occur isolated. Processes typically thin, slender and solid but a few may be broad, flattened, solid and fibrous with fenestrate stem; proximally the processes may be joined by a low ridge in some groups but are generally isolated. Processes characteristically have slightly expanded proximal bases and more expanded distal ends terminating into a few to several branched stems which are joined distally by patulate to recurved, thin, net-like perforate membrane and also through slender, smooth, arched, ribbon-like trabecular strands; some of the adjacent process complexes joined with thin, perforate, membranous or slender trabecular discontinuous ectophragm. Development of ectophragm is more commonly found along marginal zone in precingular and postcingular regions.
Parasutural features absent. Archaeopyle apical, type (tA), principal archaeopyle sutures angular, zigzag with a prominent offset parasulcal notch and corresponding parasulcal tab, faint accessory archaeopyle sutures extending into apical paraplates often visible; operculum free but commonly remains in place. Paracingulum not clearly indicated, probably expressed by few slender processes. Parasulcus generally indicated by process free area posterior to parasulcal notch; its antapical end is often marked by a slender process in extreme posterior sulcal region.
Paratabulation indicated by archaeopyle and intratabular to penitabular process complexes. Clarity of paratabulation is somewhat obliterated by more complexly branched and distally joined process complexes along the marginal zone in precingular and postcingular regions ; paratabulation gonyaulacacean, expressed by 4', 6", ? 0-3C, 5-6"', 1 p, ? 1 ps, l '"'. Apical process complexes annulate to arcuate, those reflecting paraplates l' and 4' are always smaller having shorter processes than process complexes reflecting 2' and 3'. Process complexes in pre-and post-cingular paraplates often less clearly demarcated due to extensive branching and distal trabecular network but are discernible in some specimens; those reflecting paraplates 3" and 6" are typically reduced . Processes representing paracingular, ? 1 '" and lp paraplate are typically slender, isolated and least branched.
Dimensions: Holotype - Range
Cyst size with process complex: 118 X 104 µm - 84-118 X 90-104 µm
Body size: 74 X 66 µm - 60-74 X 55-66 µm
Length of process complexes: 15 to 30 µm - 10 to 30 µm
Comparison-Glaphyrocysta indica sp. nov. differs from all the known species of the genus in its well defined process complexes each of which is typically joined by perforate membrane but with reduced trabecular ectophragm between adjacent process complexes and differentially ornamented autophragm.
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Holotype: Jain and Garg, 1991, pl.4, figs.14-16; Fauconnier and Masure, 2004, pl.32, figs.8-9.
Age: Miocene.
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Original description (Jain & Garg, 1991)
Glaphyrocysta indica sp. nov. Pl. 4, figs 1, 2, 3, 7, 8, 13, 14, 15, 16
1985 Cordosphaeridium cracenospinosum Davey & Williams 1966, in Kar, p. 203-204; pl. 48, figs 5, 6.
1985 Cordosphaeridium cantharellum (Brosius) Gocht 1969, in Kar, p. 203; pl. 48, fig. 3.
1985 Cordosphaeridium sp., in Kar, p. 204 ; pl. 49, fig. 7.
Holotype-PI. 4, figs 14-16; Slide no. BSIP 6632; coordinates: 133.5 x 4.6.
Type locality-Aida, Laiyari, Khari Nadi Formation, Kutch (after Kar, 1985, p. 204); Miocene.
Diagnosis-Cyst skolochorate, dorso-ventrally compressed, ambitus circular to oval; autophragm thin, differentially ornamented, smooth to pitted. Process complexes confined along peripheral zone ; mid-dorsal and mid-ventral areas free of processes; individual processes thin, slender, solid, distally commonly branched and joined by petulate to recurved, thin, net-like perforate membrane and thin trabecular strands. Some adjacent process complexes joined by discontinuous perforate membraneous ectophragm. Archaeopyle apical ; paratabulation gonyaulacacean expressed by 4', 6", ?0-3C, 5-6'", lp, ? lps, l"".
Description-Cyst skolochorate, body lenticular, dorsoventrally compressed, circular to oval in out line, autophragm thin, differentially ornamented, smooth along periphery, gradually become dense and unequally pitted to spongy in mid-dorsal and mid-ventral areas. Autophragm gives rise to process complexes which are confined primarily along the marginal areas of the cyst; mid-dorsal and midventral areas are free of processes; processes commonly occur in annulate to arcuate or often linear, intratabular to penitabular complexes with simple or complexly branched stem but a few may occur isolated. Processes typically thin, slender and solid but a few may be broad, flattened, solid and fibrous with fenestrate stem; proximally the processes may be joined by a low ridge in some groups but are generally isolated. Processes characteristically have slightly expanded proximal bases and more expanded distal ends terminating into a few to several branched stems which are joined distally by patulate to recurved, thin, net-like perforate membrane and also through slender, smooth, arched, ribbon-like trabecular strands; some of the adjacent process complexes joined with thin, perforate, membranous or slender trabecular discontinuous ectophragm. Development of ectophragm is more commonly found along marginal zone in precingular and postcingular regions.
Parasutural features absent. Archaeopyle apical, type (tA), principal archaeopyle sutures angular, zigzag with a prominent offset parasulcal notch and corresponding parasulcal tab, faint accessory archaeopyle sutures extending into apical paraplates often visible; operculum free but commonly remains in place. Paracingulum not clearly indicated, probably expressed by few slender processes. Parasulcus generally indicated by process free area posterior to parasulcal notch; its antapical end is often marked by a slender process in extreme posterior sulcal region.
Paratabulation indicated by archaeopyle and intratabular to penitabular process complexes. Clarity of paratabulation is somewhat obliterated by more complexly branched and distally joined process complexes along the marginal zone in precingular and postcingular regions ; paratabulation gonyaulacacean, expressed by 4', 6", ? 0-3C, 5-6"', 1 p, ? 1 ps, l '"'. Apical process complexes annulate to arcuate, those reflecting paraplates l' and 4' are always smaller having shorter processes than process complexes reflecting 2' and 3'. Process complexes in pre-and post-cingular paraplates often less clearly demarcated due to extensive branching and distal trabecular network but are discernible in some specimens; those reflecting paraplates 3" and 6" are typically reduced . Processes representing paracingular, ? 1 '" and lp paraplate are typically slender, isolated and least branched.
Dimensions: Holotype - Range
Cyst size with process complex: 118 X 104 µm - 84-118 X 90-104 µm
Body size: 74 X 66 µm - 60-74 X 55-66 µm
Length of process complexes: 15 to 30 µm - 10 to 30 µm
Comparison-Glaphyrocysta indica sp. nov. differs from all the known species of the genus in its well defined process complexes each of which is typically joined by perforate membrane but with reduced trabecular ectophragm between adjacent process complexes and differentially ornamented autophragm.
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