N73

Notes on the Genera Lamprocyclas, Lamprocyrtis and Pterocorys

Genus Lamprocyclas Haeckel emend. Nigrini

Lamprocyclas Haeckel, 1881, p. 434; 1887, p. 1390; Nigrini, 1967, p. 74

Theocorythidae with double corona of solid terminal teeth around the mouth. Thoracic ribs present. The definition of this genus is emended to include forms having thoracic ribs. The distal projections of members of this genus are regarded as teeth rather than radial apophyses.

Type species: Lamprocyclas nuptialis Haeckel, 1887, p. 1390, pl. 74, fig. 15.

For further generic synonymy and description see Petrushevskaya and Kozlova, 1972, p. 544.

Species included herein:

Lamprocyclas maritalis maritalis Haeckel

Lamprocyclas maritalis Haeckel polypora Nigrini

Lamprocyclas maritalis Haeckel ventricosa Nigrini

Genus Lamprocyrtis Kling

Lamprocyrtis Kling, 1973, p. 638

"This genus is erected to accommodate the lineage from Lamprocyrtis heteroporos through L. haysi (1) and possibly L. (?) hannai, a possible ancestor of the lineage. It is difficult to characterize because of rather marked differences between the initial and latest members of the lineage. Included are two- (later) and three (earlier) segmented forms with a usually open, indistinctly three-lobed cephalis which tends to be cylindrical. The cephalis bears one stout, three-bladed apical horn and commonly one or more accessory spines. Pores of the post-cephalic segment(s) usually increase in size distally, earlier species displaying a distinctive discontinuity in pore size. The shells terminate in a single, irregular row of axially to inwardly directed teeth which sometimes occupy a weakly developed peristome. Teeth occasionally occur outside the terminal row, but do not constitute a distinct second row as in Lamprocyclas Haeckel, 1882.

Type species: Lamprocyclas heteroporos Hays, 1965, p. 179, pl. 3, fig. 1."

Species included herein:

Lamprocyrtis nigriniae (Caulet)

Lamprocyrtis (?) hannai (Campbell and Clark)

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(1) correct name is L. nigriniae

N74

Genus Pterocorys Haeckel

Pterocorys Haeckel, 1881, p. 435

Theoconus Haeckel, 1887, p. 1399

Lithopilium Popofsky, 1913, p. 377

"Cephalis cylindrical or conical. Abdomen longer and broader than thorax (if fully developed). The margin of the abdomen without any teeth, or horns. No peristome. The mouth of the shell may be closed as a sack.

"Tertiary-Recent." (from Petrushevskaya and Kozlova, 1972).

Type species: Pterocorys campanula Haeckel, 1887, p. 1316, pl. 71, fig. 3.

Species included herein:

Pterocorys hertwigii (Haeckel)

Pterocorys minythorax (Nigrini)

Pterocorys zancleus (Muller)