Dear Phyllis,
You have asked some very basic questions; why?
The fundamental character of Longchaeus Mørch, 1875 (type Pyramidella punctata
Schubert and Wagner, 1829) is the channeled suture (also called a "peripheral
sulcus," the same thing. It is otherwise similar to the type genus of its
family (Pyramidellidae Gray, 1840), Pyramidella Lamarck, 1799 (type Trochus
dolabratus Linnaeus, 1758). The following passage (from a manuscript of mine)
will demonstrate some of the difficulties with species referable to Longchaeus:
683. Longchaeus crenulatus (Holmes, 1859) Crinkled Pyram [4] 12 mm.
Drift, 16th Avenue S., Jacksonville Beach. NB! 11/81. (NB).
Drift, 1.0 mi. N. Crescent Beach. HM! 1974. (HM).
Spoil, beach renourishment, Atlantic Beach. BH! 5/78. (BH).
Ex seastar (Astropecten articulatus), trawled, 30-60 ft., off Big Talbot
Is. WS!
1965-75. (HL).
Tuomey and Holmes (1848) indicated that the Miocene Pyramidella arenosa Conrad,
1843 occurs in the Recent. It is certainly close to L. crenulatus, as are
several other named fossil taxa. The similar L. candidus (Mørch, 1875) has a
thicker, shiny white shell and more-developed columellar lirae (when adult).
Abbott (1974) records it from NC to FL (probably based on Dall, 1889a), but his
figure (3461) is not of a Longchaeus species, and may be Pyramidella
subdolabrata Mørch, 1854 (no. 3460). L. candidus occurs in the Bahamas,
Honduras, Venezuela, and Brasil (HL) and is accurately illustrated in Warmke
and Abbott (1961; pl. 26, fig. d).
I can recommend the following for more info:
Abbott, R. T., 1974. American seashells. Second edition. Van Nostrand Reinhold
Co., New York, pp. 1-663 incl. numerous text figs. + 24 pls.
Campbell, L. D., 1993. Pliocene Molluscs from the Yorktown and Chowan River
Formations in
Virginia. Virg. Div. Mineral Resources publ. 127: 1-259 incl. 14 pls.
Bartsch, P., 1955. The Pyramidellid mollusks of the Pliocene deposits of north
St. Petersburg, Florida. Smithsonian. Misc. Coll. 125(2): 1-102 + iii + pl.
1-28. May 5.
Dall, W. H., 1889a. Reports on the results of dredging, under the supervision
of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea
(1879-80), by the by the U. S. Coast Survey Steamer “Blake,” Lieut.-Commander
C. D. Sigsbee, U. S. N., and Commander J. R. Bartlett, U. S. N., commanding.
XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bull. Mus.
Comp. Zool. 18: 1-492 + pls. 10-40. June.
Thiele, J., 1931. Handbuch der sytematishen weichtierkunde. Zweiter Teil.
Verlag
von Gustav Fischer, Jena, pp. 377-778.
Warmke G. L. and R. T. Abbott, 1961. Caribbean Seashells. Livingstone
Publishing Co., Narberth, PA, xx + pp. 1-348, incl. 44 pls.
Thanks for the offer of literature,
Harry
At 05:40 PM 6/5/00 -0400, you wrote:
>Dear Harry,
>If you do not get someone to bring you beach drift I am making plans to go
>next March and will bring you some.
>I am sending out a package tomorrow with a couple old papers you may be
>interested in and if not just throw them out.
>Will be giving the slide program to Broward on the 14th and then will send
>them back to you.
>Could you please tell me where I can find information on the following.
>Pyramidella subgenus longchaeus Morch.1875
>Pyramedella crenulata (Holmes, 1859)
>Pyramidella suturalis (H. Lea, 1843)
>Thanks, Phyllis
>[log in to unmask]
Harry G. Lee
Suite 500
1801 Barrs St.
Jacksonville, FL 32204
USA 904-384-6419
<[log in to unmask]>
Visit the Jacksonville Shell Club Home Page at:
http://home.sprynet.com/~wfrank/jacksonv.htm
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