Nododelphinulidae? gen. et sp. indet.

Plate 4: figs 8–11

Material.

1 specimen, SNSB – BSPG 2016 XXI 1737.

Description.

Shell broadly turbiniform, with gradate spire; specimen 17 mm wide; earliest visible ornament consists of two edges, one at about mid-whorl, the other suprasutural; whorl face above adapical edge forms oblique ramp, approximately vertical below edge; nodular spiral cord in subsutural position; between this cord and adapical edge, first one, then a second spiral cord appear on ramp and also on whorl face between edges; whorl face ornamented with widely spaced, bulging axial ribs that continue onto center of base; axial ribs approximately orthocline on whorl face and distinctly opisthocline on base; adapical edge with numerous small nodes in early whorls but fewer and larger nodes on last whorl; same trend on abapical edge, but not as distinct; nodes spirally elongated, tapering in abapertural direction with narrow beginning and trumpet-like widening in apertural direction; spoon-like pits at apertural end of nodes, which terminate abruptly, immediately followed by narrow beginning of next node; widened spoon-like ending of elongate nodes lies at intersection of axial ribs and spiral cords; base flatly convex with angular transition to whorl face; base covered with nodular spiral cords; aperture not preserved.

Remarks.

The morphology of the spirally elongated nodes is to our knowledge unique; we know of no other example from the literature.