Conus
(Conasprella) hertwecki (Petuch, 1988)
Description (1).
Shell dextral, small. Last whorl
conical; outline slightly convex. Aperture slightly wider at base than near
shoulder. Shoulder angulate; undulations on final quarter of last shoulder whorl
might be tubercles. Spire height moderate; outline slightly concave. Teleoconch
sutural ramps sigmoidal. Subsutural flexure asymmetrically curved; depth
approximately equal to width. Last whorl with strong spiral chords on anterior
half, becoming weaker toward shoulder (1).
Type observed.–Holotype (USNM 427968; Pl. 18, Figs 9-10). Shell length 14.9 mm;
maximum diameter 7.5 mm; apertural height 12.9 mm; height of maximum diameter
12.3 mm; spire angle 111º. Shell is in very good condition. No other specimens
known (Hendriciks, 2008) (1).
Occurrence.–Holotype was “collected with reef corals, dredged in Mule Pen Quarry,
East of Naples, Collier County, Florida, from approximately 20 m depth”
(Petuch, 1988: 56) and is from the Tamiami Formation (Pinecrest Beds).
Remarks.–This is a distinctive looking specimen that cannot be readily placed
with any other co-occurring species. Because it is represented by a single
specimen, however, this taxon cannot be further evaluated at this time. Petuch
(1988) compared Conus hertwecki to the extant western Pacifi c taxon C.
proximus G. B. Sowerby II, 1859, which does have a very similar overall
shell form (e.g., see Röckel et al., 1995) (1).
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Conus
hertwecki (Petuch, 1988) (1) Holotype
(USNM 427968) Mule Pen Quarry, Collier County, Florida. Tamiami
Formation, Pinecrest Beds. SL 14,9 mm; MD 7,5 mm. |
Bibliografia Consultata