Named By: Graham E. Budd - 1997.
Classification: Arthropoda, Dinocaridida, Radiodonta, Anomalocarididae.
Species: P. whittingtoni (type).
Diet: Filter feeder.
Size: Approximately 45 millimetres long, possibly slightly larger.
Known locations: Greenland - Sirius Passet.
Time period: Botomian of the Cambrian.
Fossil representation: Several specimens.
is thought to have been very similar to the arthropod Kerygmachela,
and as such is probably related to Anomalocaris.
however, Pambdelurion does not possess large
spines for spearing prey
on its two forward limbs. Instead Pambdelurion
had rows of much
smaller probably flexible spines which were arranged like combs. It
is thought that these combs filtered plankton out of the water which
were then passed to the mouth. Aside from this, Pambdelurion
differs from Kerygmachela in having a larger mouth
and lack of rearward
facing spines. However deposits from the same age and fossil location
indicate that both Pambdelurion and Kerygmachela
were active in the
same waters together.
Pambdelurion had eleven lobes like some other arthropods suggesting that it was capable of swimming in open water. However Pambdelurion also has eleven pairs of legs that are like those of lobopods. Not only does this indicate that Pambdelurion was not always swimming in open water, but it also suggests a potential alternative feeding strategy. Instead of Pambdelurion feeding by swimming through planktonic layers, it may have anchored itself to rocks and allowed tidal currents to flow through the comb filters, depositing plankton and possibly other bits of organic matter in the process.
- Stem group arthropods from the Lower Cambrian Sirius Passet fauna of North Greenland. - G. E. Budd - 1998.