On unreported historical specimens of marine arthropods from the Solnhofen and Nusplingen Lithographic Limestones (Late Jurassic, Germany) housed at the Muséum national d’Histoire naturelle, Paris
Author
Odin, Giliane P.
Author
Charbonnier, Sylvain
Author
Devillez, Julien
Author
Schweigert, Günter
text
Geodiversitas
2019
2019-09-23
41
17
643
662
journal article
10.5252/geodiversitas2019v41a17
857eb594-755e-493e-a705-602b5d46e686
1638-9395
3695414
urn:lsid:zoobank.org:pub:541CF827-F02E-4086-8FB0-2C0033DD429A
Family
ERYMIDAE
Van Straelen, 1925
PRELIMINARY REMARKS
Eryma modestiforme
(
Schlotheim, 1822
)
(
Fig. 6
),
Palaeastacus fuciformis
(
Schlotheim, 1822
)
(
Fig. 7
) and
Pustulina minuta
(
Schlotheim, 1822
)
(
Fig. 7
) are the three most common erymids found in the Solnhofen Lithographic Limestones. Numerous specimens are almost complete, but the compression often impedes the identification of the carapace grooves, which are important for the systematic of the
Erymidae
. Instead, we use the general ornamentation and the features of the P1 chelae (shape and ornamentation) to distinguish the erymid lobsters. Indeed,
P. fuciformis
and
P. minuta
have P1 chelae with a subrectangular propodus bearing short and wide fingers, while the fingers of
E. modestiforme
are longer than the propodus and are progressively narrowing to their distal extremity. Moreover,
E. modestiforme
is ornamented by small tubercles and depressions, while
P. minuta
is covered by coarse rounded tubercles and
P. fuciformis
bears strong spines on its carapace and its P1 propodus.