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Spiniferites delicatus
Spiniferites delicatus Reid, 1974
Holotype: Reid, 1974, pl.2, figs.20-22
Locus typicus: Dee Estuary.
Stratum typicum: Recent
Age: Recent
Synonym: cf. Hystrichosphaera cf. tertiaria sensu Morz.-Kero, 1966: 138, pl. 1 fig. 3. non Eisenack & Gocht.
Diagnosis: Reid 1974, p. 601
Circular to ovoidal cysts with a double layered microgranular to reticulate wall. High granular membranous sutural flanges connect the gonal processes which are supported by skeletal rods. In plan view process tips have a characteric petaloid shape.
Dimensions: Holotype: Test 47 x 49 µm, Process height 21 µm, Girdle width 71 µm; Range: Test 40 x 35 µm to 60 x 54 µm; Maximum height of processes 29 µm; Girdle 6-9 µm; Number of specimens measured 18
Description: Reid 1974, p. 601
The cyst wall is thick, with radial "columellae" or fibres in the endophragm and with a much thinner granular periphragm. The surface is microgranular to microreticulate. Processes are supported by thin skeletal rods which trifurcate and then bifurcate in the process tips. These processes are usually connected by high granular membranous flanges which vary greatly in their development in individual specimens. An apical node or low boss may be found at the head of 1" and 4". In most specimens the sutural flanges are of equal height over the whole test, but a few may have high antapical flanges surrounding 1"". The girdle is sinistral and is displaced by three times its width. The sulcus which is orientated posterior/anteriorly. It has the following sulcal plates: PS, IS, LS, RA and AS. The tabulation is typical for the genus with an apical series of four plates and a precingular archeopyle 3" which is reduced.
Remarks: Reid 1974, p. 601
Specimens were found which resembled the illustration of H. cf. tertiaria in Morzadec-Kerfourn (1966). Rossignol (1964) described a species with high septae from the Israeli Quaternary, H. cingulata. It differs from the present form in having baton shaped processes. H. cingulata var. reticulata Davey and Williams (1966) from the Middle and Upper Cenomanian of England is similar to S. delicatus but differs in the lower height of the membranes. Many specimens were found with the membrane missing and with crumpled and collapsed processes. A similar form was described by Williams (1965 unpublished Ph.D. thesis) from Atlantic bottom samples.
Stratigraphic Range: Holocene to Recent.
Thecal Afflnity: Unknown.
Holotype: Reid, 1974, pl.2, figs.20-22
Locus typicus: Dee Estuary.
Stratum typicum: Recent
Age: Recent
Synonym: cf. Hystrichosphaera cf. tertiaria sensu Morz.-Kero, 1966: 138, pl. 1 fig. 3. non Eisenack & Gocht.
Diagnosis: Reid 1974, p. 601
Circular to ovoidal cysts with a double layered microgranular to reticulate wall. High granular membranous sutural flanges connect the gonal processes which are supported by skeletal rods. In plan view process tips have a characteric petaloid shape.
Dimensions: Holotype: Test 47 x 49 µm, Process height 21 µm, Girdle width 71 µm; Range: Test 40 x 35 µm to 60 x 54 µm; Maximum height of processes 29 µm; Girdle 6-9 µm; Number of specimens measured 18
Description: Reid 1974, p. 601
The cyst wall is thick, with radial "columellae" or fibres in the endophragm and with a much thinner granular periphragm. The surface is microgranular to microreticulate. Processes are supported by thin skeletal rods which trifurcate and then bifurcate in the process tips. These processes are usually connected by high granular membranous flanges which vary greatly in their development in individual specimens. An apical node or low boss may be found at the head of 1" and 4". In most specimens the sutural flanges are of equal height over the whole test, but a few may have high antapical flanges surrounding 1"". The girdle is sinistral and is displaced by three times its width. The sulcus which is orientated posterior/anteriorly. It has the following sulcal plates: PS, IS, LS, RA and AS. The tabulation is typical for the genus with an apical series of four plates and a precingular archeopyle 3" which is reduced.
Remarks: Reid 1974, p. 601
Specimens were found which resembled the illustration of H. cf. tertiaria in Morzadec-Kerfourn (1966). Rossignol (1964) described a species with high septae from the Israeli Quaternary, H. cingulata. It differs from the present form in having baton shaped processes. H. cingulata var. reticulata Davey and Williams (1966) from the Middle and Upper Cenomanian of England is similar to S. delicatus but differs in the lower height of the membranes. Many specimens were found with the membrane missing and with crumpled and collapsed processes. A similar form was described by Williams (1965 unpublished Ph.D. thesis) from Atlantic bottom samples.
Stratigraphic Range: Holocene to Recent.
Thecal Afflnity: Unknown.