What is the star system?
The star system calculates the number of pieces that were handled by Conchology, Inc. in the last 21 years:
| 0 – 5 pieces | 6 stars |
|
| 6 – 10 pieces | 5 stars |
|
| 11 - 25 pieces | 4 stars | |
| 26 - 75 pieces | 3 stars | |
| 76 - 150 pieces | 2 stars | |
| > 150 pieces | 1 star | |
We want to point out that the star system is only very reliable for PHILIPPINE shells only, as we handle very few foreign shells in general. As time goes, the system will become more and more performant.
WMSDB - Worldwide Mollusc Species DataBase
TRACHYCERATIDAE
Genus
: Paratrachyceras Bychkov, 1973 †
Paratrachyceras sutherlandi
McLearn, 1947 †
Paratrachyceras ulynense
Bychkov, 1973 †
Genus
: Protrachyceras Mansuy, 1912 †
Protrachyceras archelaus
(Laube †)
Protrachyceras beckeri
Smith, 1927 †
Protrachyceras californicum
Smith, 1927 †
Protrachyceras costulatum
Mansuy, 1912 †
Protrachyceras deprati
Mansuy, 1912 †
Protrachyceras lecontei
A. Hyatt & Smith, 1905 †
Protrachyceras lindgreni
Smith, 1927 †
Protrachyceras madisonense
Smith, 1927 †
Protrachyceras reitzi
(Boeckh, 1875 †)
Protrachyceras seimkanensis
Mojsisovics 1893 †
Protrachyceras sikanianum
McLearn, 1930 †
Protrachyceras springeri
Smith, 1914 †
Protrachyceras storrsi
Smith, 1927 †
Protrachyceras zauwae
McLearn, 1930 †
Genus
: Pseudosirenites Tozer, 1994 †
Pseudosirenites bullatus
Tozer, 1994 †
Pseudosirenites falcatus
Tozer, 1994 †
Pseudosirenites pardoneti
McLearn, 1940 †
Pseudosirenites pressus
McLearn, 1947 †
Genus
: Pterosirenites Tozer, 1980 †
Pterosirenites auritus
Tozer, 1980 †
Pterosirenites nelgehensis
(Arkhipov, 1974 †)
Pterosirenites obrucevi
(Bajarunas, 1932 †)
Pterosirenites seimkanensis
(Bychkov, 1974 †)
Genus
: Seimkanites (Bychkov, 1976 †)
Seimkanites aculeatus
(Bychkov, 1976 †)