. Bulletins of American paleontology. North American Mitrate Stylophorans: Parsley 39 Anatiferocystis papillata (Bassler, 1943) Plate 7, figures 5-9, 11-13, Plate 8, figures 1-11; Text-figures 19, 20 Enopteural [sic] papillata Bassler, 1943, p. 695, pi. 1, figs. 3-5. Kirkocystis papillata (Bass\er). Bassler, 1950, p. 277, figs. 15, 16. Anatiferocystis papillata (Bassler). Ubaghs, 1968a, p. S555; Parsley, 1982, p. 323. Anatiferocystis spinosa Ubaghs, 1979, pp. 107-111, fig. 4. Diagnosis.^^—Anatiferocystis with theca covered with numerous posteriorly-inclined small triangular spines. Occurrence.
. Bulletins of American paleontology. North American Mitrate Stylophorans: Parsley 39 Anatiferocystis papillata (Bassler, 1943) Plate 7, figures 5-9, 11-13, Plate 8, figures 1-11; Text-figures 19, 20 Enopteural [sic] papillata Bassler, 1943, p. 695, pi. 1, figs. 3-5. Kirkocystis papillata (Bass\er). Bassler, 1950, p. 277, figs. 15, 16. Anatiferocystis papillata (Bassler). Ubaghs, 1968a, p. S555; Parsley, 1982, p. 323. Anatiferocystis spinosa Ubaghs, 1979, pp. 107-111, fig. 4. Diagnosis.^^—Anatiferocystis with theca covered with numerous posteriorly-inclined small triangular spines. Occurrence. —Letna Formation (Early Caradocian), Haj near Zahofany, Bohemia, Czechoslovakia; Poole- ville Member, Bromide Formation (Blackriveran), Criner Hills, Oklahoma (see Parsley, 1982, p. 323) [Locality N], Benbolt Formation (Blackriveran), east- em Tennessee (Broadhead, written commun., 1986). ^.-Hypotypes: UCM 46036-46043, USNM 401450-401451, Locality N. Description.—The superior surface (carapace) of the theca is convex, and the inferior surface (plastron) is slightly concave to planar (PI. 7, figs. 5, 6, 9, 11, 12; PI. 8, figs. 1-8, 11). The sides and carapace gently taper distally to the asymmetrically-blunted end (PI. 7, figs. 7, 8; Text-fig. 19C). The theca is almost entirely made up of the paired adaulacophoral plates. Both adaula- cophorals are reflexed into an inferolateral ridge at the proximal end of theca, which becomes diagonally lat- eral distally (PI. 7, figs. 6, 12, PI. 8, figs. 3, 7, 11). The suture between the adaulacophorals is considerably ' translated from Ubaghs, 1979, p. 108. overlapped on the carapace; commonly the right adau- lacophoral overlaps the left at a ratio of about 2:1. There is little thinning of the plates along this suture. Hence, the suture is marked by a step on the carapace surface (PI. 7, figs. 9, 11; PI. 8, figs. 1, 2, 4, 6). On the plastron, marginals Ml, M'l form the in- ferior proximal margin. Ml is small, rectangular, and is d
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