Kitchinites sp.

KENNEDY, W. J., LANDMAN, N. H., COBBAN, W. A. & JOHNSON, R. O., 2000, Additions to the Ammonite Fauna of the Upper Cretaceous Navesink Formation of New Jersey, American Museum Novitates 3306, pp. 1-31 : 7-9

Kitchinites sp.

Figure 4A, B

DESCRIPTION: MAPS A2010 a 1 is a planulate fragment 28 mm long with a maximum preserved whorl height of 16 mm and a ratio of whorl breadth to whorl height of 0.58. Coiling is moderately involute, with a very shallow umbilicus. The umbilical wall is flattened and the umbilical shoulder is narrowly rounded. The inner flanks are flattened and subparallel and the outer flanks are convergent. The ventrolateral shoulders are narrowly rounded and the venter is flattened to feebly concave. The surface of the mold is smooth. The suture is poorly preserved, but appears to have been moderately incised and of puzosiine type .

DISCUSSION: The coiling and suture suggest Puzosiinae , while the lack of ornament finds a match in certain Kitchinites , such as juvenile Kitchinites spathi Henderson and McNamara, 1985, p. 57 , pl. 4, figs. 5, 6, 9, 10, 14, 15, text­fig. 6b, c, which leads us to refer the fragment to Kitchinites sp.

OCCURRENCE: Lower phosphatic layer, basal Navesink Formation, Atlantic Highlands, New Jersey.

FAMILY PACHYDISCIDAE SPATH, 1922

Genus and Subgenus Pachydiscus Zittel, 1884

TYPE SPECIES: Ammonites neubergicus Hauer, 1858 (p. 12, pl. 2, figs. 1–3, pl. 3, figs. 1, 2) by the subsequent designation of de Grossouvre (1894: 177) .