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Aprobolocysta neista
Aprobolocysta neista, Duxbury, 1980
Originally (and now) Aprobolocysta, subsequently Necrobroomea. Below, 1990, transferred this species to Necrobroomea Wiggins, 1975. Lentin and Williams, 1993, retained this species in Aprobolocysta.
Duxbury (1980) cited the epithet as "neistosa" but indicated that it was based on the Greek adjective "neistos". According to the I.C.N., taxon names are to be treated as Latin; thus under Article 60.12, this epithet should be rendered as "neista", in agreement with the feminine gender of the generic name. The neuter form would be "neistum" and the masculine form "neistus".
Holotype: Duxbury, 1980, pl. 2, figs. 8,9; Pourtoy, 1988, pl.4, figs.4-5,7-9.
Locus typicus: Speeton Clay, Speeton, England
Stratum typicum: Barremian
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Original description: [Duxbury, 1980, p. 112]:
Diagnosis:
An elongate ovoidal, proximate to proximochorate dinoflagellate cyst. It has distinctive, delicate crests which may attain a height equal to half the main body width. The crests are clearly lobate and sometimes outline an indistinct paratabulation pattern. Usually, secondary crests are present and these break up the paraplate areas into a crude reticulum.
The archeopyle is apical with the operculum sometimes remaining attached.
Dimensions:
Holotype (operculum detached): 67 x 49 µm. Complete Specimens: 75 (72) 67 x 64 (53) 46 µm. Operculum Detached: 73 (63) 57 x 55 (47) 39 µm.
Affinities:
This species differs from others of the genus in having very distinctive, delicate crests which sometimes reflect an indistinct paratabulation pattern or form a crude reticulum. Aprobolocysta eilema Duxbury, 1977 has folds which run sinuously around the paracingulum and from the paracingulum to the antapex, but displays no parasutural and secondary crests, as in A. neistosa. Aprobolocysta varigranosa Duxbury, 1977 has neither folds nor crests.
Originally (and now) Aprobolocysta, subsequently Necrobroomea. Below, 1990, transferred this species to Necrobroomea Wiggins, 1975. Lentin and Williams, 1993, retained this species in Aprobolocysta.
Duxbury (1980) cited the epithet as "neistosa" but indicated that it was based on the Greek adjective "neistos". According to the I.C.N., taxon names are to be treated as Latin; thus under Article 60.12, this epithet should be rendered as "neista", in agreement with the feminine gender of the generic name. The neuter form would be "neistum" and the masculine form "neistus".
Holotype: Duxbury, 1980, pl. 2, figs. 8,9; Pourtoy, 1988, pl.4, figs.4-5,7-9.
Locus typicus: Speeton Clay, Speeton, England
Stratum typicum: Barremian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Duxbury, 1980, p. 112]:
Diagnosis:
An elongate ovoidal, proximate to proximochorate dinoflagellate cyst. It has distinctive, delicate crests which may attain a height equal to half the main body width. The crests are clearly lobate and sometimes outline an indistinct paratabulation pattern. Usually, secondary crests are present and these break up the paraplate areas into a crude reticulum.
The archeopyle is apical with the operculum sometimes remaining attached.
Dimensions:
Holotype (operculum detached): 67 x 49 µm. Complete Specimens: 75 (72) 67 x 64 (53) 46 µm. Operculum Detached: 73 (63) 57 x 55 (47) 39 µm.
Affinities:
This species differs from others of the genus in having very distinctive, delicate crests which sometimes reflect an indistinct paratabulation pattern or form a crude reticulum. Aprobolocysta eilema Duxbury, 1977 has folds which run sinuously around the paracingulum and from the paracingulum to the antapex, but displays no parasutural and secondary crests, as in A. neistosa. Aprobolocysta varigranosa Duxbury, 1977 has neither folds nor crests.