Paraseraphs placitus Jung, 1974
publication ID |
https://doi.org/ 10.5252/g2010n3a4 |
persistent identifier |
https://treatment.plazi.org/id/03A69848-FFB0-1E78-FF29-FC4DFCFFFA12 |
treatment provided by |
Marcus |
scientific name |
Paraseraphs placitus Jung, 1974 |
status |
|
Paraseraphs placitus Jung, 1974 View in CoL ( Figs 24 View FIG G-M; 28)
Paraseraphs placitus Jung, 1974: 38 View in CoL , pl. 10, figs 13-18, text-fig. 28.
Terebellum fusiforme – Sowerby 1821: 157, pl. 287. — De Blainville 1828: 276. — Deshayes 1835: 738, pl. 95, figs 30, 31. Non Lamarck, 1802.
Terebellum View in CoL (s.s.) fusiforme – Glibert 1938: 65, 66, pl. 2, fig.7. — Cossmann 1889: 96 partim. Non Lamarck, 1802.
Terebellum View in CoL (s.s.) fusiforme postconicum Cossmann, 1904: 44. Non de Gregorio, 1880.
Paraseraphs placitus View in CoL – Dolin et al. 1980: 28. — Le Renard 1992: 6. — Le Renard & Pacaud 1995: 112. — Pacaud & Le Renard 1995: 162.
TYPE LOCALITY. — Les Garennes, Chaussy (Val d’Oise, France), Lutetian (Middle Eocene).
TYPE MATERIAL. — Holotype ( NMB H14491); paratype ( NMB H10539), Les Garennes, Chaussy ( Val d’Oise , France); paratypes ( UCBL coll. Deshayes), Mouchy-le- Châtel (Oise) and Parnes (Oise), not found.
OTHER MATERIAL EXAMINED. — See Appendix 1.
DESCRIPTION
Shell
Shell up to 30 mm in height and 7 mm in diameter, moderately slender and evolute with distinct suture. Aperture long and narrow. Callus of the inner lip well developed, well delineated, extending to the apex and forming a narrow band parallel to the outer lip ( Fig. 24I View FIG ). Basal part of the columella bent backwards. Outer lip, almost straight and slightly opisthocline ( Fig. 24H, M View FIG ), not thickened on the basal part of the shell. Adapical part of the outer lip thickened and extending from the adapical end of the aperture, towards the apex ( Fig. 24H View FIG ), or bent towards the dorsal side ( Fig. 24M View FIG ). Siphonal notch moderately deep. Sculpture with a few oblique grooves near the base of the shell ( Fig. 24K View FIG ).
Colour pattern
Paraseraphs placitus has numerous and irregular dots with 2 levels of residual coloration on a lighter background ( Fig. 28 View FIG ). The first level consists of triangular spots, darker than the background.Th ese spots, more or less distorted, are orientated towards the growing edge ( Fig. 28C, F, L View FIG ). The second level consists of fluorescent spots with fuzzy borders, lighter than the background. These light spots, adjacent to the base of dark spots, are narrow and directed towards the inner lip in ventral view ( Fig. 28C, F, L View FIG ). They are variable in size. Th ese two components form the dots. The density of dots is generally low. Also, a peculiar pattern can be distinguished on the adapical part of the outer lip: an oblique succession of darker and lighter “patches” ( Fig. 28B, D, E, M, N View FIG ). These “patches” are probably the result of the coalescence of the dark axial segments ( Fig. 28D View FIG ).
VARIABILITY
Sometimes the darker spots of the dots are larger near the edge of the outer lip ( Fig. 28B, C, P View FIG ) and are coalescent.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |
|
Genus |
Paraseraphs placitus Jung, 1974
Caze, Bruno, Merle, Didier, Pacaud, Jean-Michel & Saint Martin, Jean-Paul 2010 |
Paraseraphs placitus
LE RENARD J. & PACAUD J. - M. 1995: 112 |
LE RENARD J. & PACAUD J. - M. 1995: 162 |
LE RENARD J. 1992: 6 |
DOLIN L. & DOLIN C. & LE RENARD J. 1980: 28 |
Paraseraphs placitus
JUNG P. 1974: 38 |
Terebellum
GLIBERT M. 1938: 65 |
COSSMANN M. 1889: 96 |
Terebellum
COSSMANN M. 1904: 44 |
Terebellum fusiforme
DESHAYES G. - P. 1835: 738 |
DUCROTAY DE BLAINVILLE H. M. 1828: 276 |
SOWERBY J. 1821: 157 |