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Taxon profile

species

Trabecula kronenbergi (van Aartsen, Gittenberger & Goud, 2000)

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Allogastropoda »  family Pyramidellidae »  genus Trabecula

Scientific synonyms

Chrysallida kronenbergi van Aartsen, Gittenberger & Goud, 2000

Images

Trabecula kronenbergi

Author: Aartsen, van, Gittenberger & Goud

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Description

Shell transparent whitish, small, conical and somewhat turreted. Embryonic whorls intorted, smooth and somewhat carinated at the top. Teleoconch consisting of about three moderately convex whorls, which are more or less turreted. Suture clearly marked but not very deep. Growthlines prosocline. Teleoconch with ten to twelve prosocline axial ribs per whorl; axials nearly as broad as their interstices. There is an abapical, prominent spiral rib. Shell base with some vague spirals. Umbilicus absent. Columella smooth.
Dimensions: H. 1.5-1.6 mm, W. 0.7-0.8 mm; holotype 1.6 x 0.8 mm.
Aartsen, J.J. , Gittenberger, E. & Goud, J., 2000. Pyramidellidae (Mollusca, Gastropoda, Heterobranchia) collected during the Dutch CANCAP and MAURITANIA expeditions in the south-eastern part of the North Atlantic Ocean (part 2)

Interchangeable taxa

Chrysallida (Trabecula) kronenbergi does not have any spiral sculpture. As such it is similar to C. (T) jeffreysiana (Monterosato, 1884), which is larger, however, and sculptured with many more axial ribs. Apart from that, the embryonic whorls of C. (T) jeffreysiana are evenly rounded, instead of carinated as in C. (T) kronenbergi. The arctic species C. bjoernsoni Waren (1991: 99,100, fig. 31B) is somewhat similar to our species too, but clearly has two spiral ribs on the teleoconch whorls. The rare, arctic C. sublustris (Friele, 1886) differs by being larger, viz. 2.0 mm instead of 1.6 mm high at three teleoconch whorls, by the more numerous and more prosocline axial ribs and by its small but conspicuous umbilicus (see Micali et al., 1993:149, fig. 8).
Aartsen, J.J. , Gittenberger, E. & Goud, J., 2000. Pyramidellidae (Mollusca, Gastropoda, Heterobranchia) collected during the Dutch CANCAP and MAURITANIA expeditions in the south-eastern part of the North Atlantic Ocean (part 2)
Author: Jan Delsing

Links and literature

EN Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [as Chrysallida kronenbergi Aartsen, Gittenberger & Goud, 1998]
Data retrieved on: 23 November 2013

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