N83

Lamprocyrtis (?) hannai (Campbell and Clark)

Calocyclas hannai Campbell and Clark, 1944, p. 48, pl. 6, figs. 21, 22

Lamprocyrtis (?) hannai (Campbell and Clark), Kling, 1973, p. 638, pl. 5, figs. 12-14, pl. 12, figs. 10-14

DESCRIPTION "Cephalis elongate, trilocular, the two secondary lobes lateral to the larger primary lobe, with subcircular pores and strong, eccentric, three-bladed apical horn, 1-4 times its length, sometimes with one or a few pores at the base. Cephalis usually open apically. In some specimens a delicate axial rod extends distally from the median bar into the thoracic cavity. Small secondary lateral bars may be seen in many specimens. Collar stricture indistinct. Thorax rather thick-walled, campanulate, with slightly rough surface and circular to subcircular pores increasing somewhat in size distally. Lumbar stricture not pronounced. Abdomen variable in form (truncate-conical, inflated or subcylindribal) with subcircular pores, variable in size, larger than those of the thorax and sometimes in distinct longitudinal rows. Thickness of the abdomen wall variable. Peristome undifferentiated with approximately 5-12 short conical teeth, sometimes bifurcate, at irregular intervals. Short conical teeth also developed subterminally on many specimens, sometimes scattered irregularly over the distal half of the abdomen." (from Nigrini, unpublished data).

DIMENSIONS "(based on twenty specimens): Length of cephalis 20-45 microns, of thorax 30-70 microns, of abdomen 25-162 microns (generally 55-120 microns). Maximum breadth of thorax 75-100 microns, of abdomen 90-152 microns (generally 90-132 microns). Number of pores on the half equator of abdomen usually 9 (varies from 8-11)." (from Nigrini, unpublished data).

REMARKS

1. This form has been described elsewhere as Lamprocyclas junonis (=Theoconus junonis Haeckel, 1887, p. 1401, pl. 69, fig. 7), i.e.,

a. Kruglikova, 1969, fig. 4-37

b. Moore, 1974, p. 22, pl. 12, figs. 8-10

c. Molina-Cruz, 1975, p. 131

However, Haeckel's illustration of Theoconus junonis shows a distinct peristome and smooth termination. Moore's and Kruglikova's illustrations show some terminal teeth or projections and no peristome. Sachs (1973) mistakenly called the same form Lamprocyclas maritalis maritalis. L. maritalis maritalis has a well-developed peristome, two rows of terminal teeth and smaller abdominal pores. Sachs' counts may include both species. The authors are indebted to Dr. Stanley Kling for some useful communication concerning this species.

Plate 25, figure 8

N84

2. Renz's (1976) illustration (pl. 6, fig. 17) of T. junonis looks more like Pterocorys zancleus. Petrushevskaya and Kozlova's (1972) illustration (pl. 36, fig. 8) of Lamprocyclas junonis is more like Haeckel's (1887) illustration.

3. The generic definitions for Lamprocyclas (in Nigrini, 1967) and for Pterocorys and Theoconus (in Petrushevskaya and Kozlova, 1972) do not provide for the specimen illustrated by Haeckel as Theoconus junonis. However, Petrushevskaya and Kozlova (1972, p. 544) in their definition of the genus Lamprocyclas permit the inclusion of forms without terminal teeth and the genus could, therefore, accomodate Haeckel's species.

RECENT DISTRIBUTION

1. Molina-Cruz, 1975, Code N15 (Lamprocyclas junonis); used in factor analysis of southeast Pacific assemblages; cf. Appendix 10 for percent N15 at each station.