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Rhombodella vesca
Rhombodella vesca Duxbury, 1980
Holotype: Duxburry 1980: Pl. 5, figs. 7, 10.
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Division MB, immediately below cementstone nodule band (Barremian)
Age: Barremian
Original diagnosis: Duxburry 1980, p. 135-136: Rhombodella vesca
A small, thin-walled species of Rhombodella. The body wall is smooth and the overall shape is more or less square in lateral view. The "corners" of the body are bluntly rounded and taper folds commonly connect opposite ones. Each "corner" bears long (approximately 1/4 main body diameter), slightly flexuous processes which number up to 10 per "corner" and which divide distally into numerous fine hairs which may be recurved towards the body.
Observed Dimensions: Holotype: 49x41 Ám; Overall: 59 (43) 35 x 41 (37) 35 Ám;
Specimens Measured: 5
Remarks: Duxburry 1980, p. 135-136:
This is a most distinctive, though small species. Rhombodella natans COOKSON & EISENACK 1962 is generally larger, more robust and bears processes which are much shorter with respect to the main body size than those of R. vesca. R. paucispina (ALBERTI, 1961) n. comb. herein is generally larger than R. vesca with simple spines rather than distally furcate processes as in the latter species. Also, R. paucispina appears somewhat more elongate and less obviously "four-cornered" than either R. natans or R. vesca.
Holotype: Duxburry 1980: Pl. 5, figs. 7, 10.
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Division MB, immediately below cementstone nodule band (Barremian)
Age: Barremian
Original diagnosis: Duxburry 1980, p. 135-136: Rhombodella vesca
A small, thin-walled species of Rhombodella. The body wall is smooth and the overall shape is more or less square in lateral view. The "corners" of the body are bluntly rounded and taper folds commonly connect opposite ones. Each "corner" bears long (approximately 1/4 main body diameter), slightly flexuous processes which number up to 10 per "corner" and which divide distally into numerous fine hairs which may be recurved towards the body.
Observed Dimensions: Holotype: 49x41 Ám; Overall: 59 (43) 35 x 41 (37) 35 Ám;
Specimens Measured: 5
Remarks: Duxburry 1980, p. 135-136:
This is a most distinctive, though small species. Rhombodella natans COOKSON & EISENACK 1962 is generally larger, more robust and bears processes which are much shorter with respect to the main body size than those of R. vesca. R. paucispina (ALBERTI, 1961) n. comb. herein is generally larger than R. vesca with simple spines rather than distally furcate processes as in the latter species. Also, R. paucispina appears somewhat more elongate and less obviously "four-cornered" than either R. natans or R. vesca.