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Chlamydophorella ejuncida
Holotype. Plate 1, figure 7; GSCA slide no. P51249-02 (¼GSCC slide no P5205–142G), 15.0-90.7; EF Q40/1; Nunavut Palaeontology Collection no. NUPB 960; Q section, Twosnout creek, Bylot Island. Bylot Island formation.
Etymology. The epithet is from the Latin ejuncidus, meaning rush-like, lean, slender, in reference to the nature of the processes.
Diagnosis. A species of Chlamydophorella lacking an apical horn, with numerous, very slender, long, nontabular processes that are commonly connected distally by a membrane or trabecula.
Comments. Chlamydophorella nyei differs from Chlamydophorella ejuncida in having a well-developed apical horn and in having a less dense covering of processes that are generally wider and shorter. According to Cookson and Eisenack (1970, 151), Chlamydophorella lagena has a ‘relatively wide, squarish apical projection. The whole surface [is] covered with numerous short, rod-like appendages which support a continuous covering membrane. No indication of either a girdle or archeopyle is evident’ (Cookson and Eisenack 1970, 151). Based on this description and the photograph of Chlamydophorella lagena in Cookson and Eisenack (1970, pl. 13, fig. 4), Chlamydophorella ejuncida is not conspecific with that species. However, according to Morgan (1980, 18–19), Chlamydophorella lagena is a taxonomic junior synonym of Chlamydophorella nyei. Based on its protologue (Clarke and Verdier 1967, 24 and pl. 2, figs. 9 and 10), Chlamydophorella discreta has processes or ‘pillars’ that are 1–2lm high, and thus shorter than the processes in Chlamydophorella ejuncida. Chlamydophorella largissima has an ‘enveloping membrane covering the apical projection and prolonged into a short neck’ (Singh 1971, 378). According to Singh (1971), the processes of Chlamydophorella largissima are 6–12um in length. Chlamydophorella ejuncida differs in lacking an apical projection and a short neck, and the processes are shorter.
Size. Holotype: central body apical view so we could not determine length, central body width 33um, process length up to 4um. Range of six specimens: central body length 26–34um, central body width 19–33um, process length up to 4um.
Age. Late Coniacian to late Campanian.
Etymology. The epithet is from the Latin ejuncidus, meaning rush-like, lean, slender, in reference to the nature of the processes.
Diagnosis. A species of Chlamydophorella lacking an apical horn, with numerous, very slender, long, nontabular processes that are commonly connected distally by a membrane or trabecula.
Comments. Chlamydophorella nyei differs from Chlamydophorella ejuncida in having a well-developed apical horn and in having a less dense covering of processes that are generally wider and shorter. According to Cookson and Eisenack (1970, 151), Chlamydophorella lagena has a ‘relatively wide, squarish apical projection. The whole surface [is] covered with numerous short, rod-like appendages which support a continuous covering membrane. No indication of either a girdle or archeopyle is evident’ (Cookson and Eisenack 1970, 151). Based on this description and the photograph of Chlamydophorella lagena in Cookson and Eisenack (1970, pl. 13, fig. 4), Chlamydophorella ejuncida is not conspecific with that species. However, according to Morgan (1980, 18–19), Chlamydophorella lagena is a taxonomic junior synonym of Chlamydophorella nyei. Based on its protologue (Clarke and Verdier 1967, 24 and pl. 2, figs. 9 and 10), Chlamydophorella discreta has processes or ‘pillars’ that are 1–2lm high, and thus shorter than the processes in Chlamydophorella ejuncida. Chlamydophorella largissima has an ‘enveloping membrane covering the apical projection and prolonged into a short neck’ (Singh 1971, 378). According to Singh (1971), the processes of Chlamydophorella largissima are 6–12um in length. Chlamydophorella ejuncida differs in lacking an apical projection and a short neck, and the processes are shorter.
Size. Holotype: central body apical view so we could not determine length, central body width 33um, process length up to 4um. Range of six specimens: central body length 26–34um, central body width 19–33um, process length up to 4um.
Age. Late Coniacian to late Campanian.