Name:
Kerygmachela
Phonetic: Keh-rig-ma-kel-a.
Named By: Graham E. Budd - 1993.
Classification: Arthropoda, Dinocaridida,
Radiodonta, Anomalocarididae.
Species: K. kierkegaardi
(type).
Diet: Carnivore.
Size: Approximately 60-65 millimetres long.
Known locations: Greenland - Sirius Passet.
Time period: Botomian of the Cambrian.
Fossil representation: Several specimens.
Kerygmachela
was an aquatic arthropod of the Cambrian that is thought to be related
to the larger Anomalocaris,
hence the placement of Kerygmachela
within the Anomalocarididae.
The type species name, K.
kierkegaardi, is in honour of Soren Kierkegaard, a
Danish
philosopher.
Kerygmachela
had eleven pairs of lateral lobes, out growths that extended from the
sides of the main body that appear to have been used for swimming.
Although not an especially fast swimmer, Kerygmachela
was probably
still fast enough to catch its preferred prey items. Like the
aforementioned Anomalocaris, Kerygmachela
had two frontal limbs,
although they appear to have curved to the sides to form a large
pincer rather than downwards. These limbs also seem to have large
spines that would have been capable of skewering soft bodied prey
animals. The mouth of Kerygmachela was between
these two limbs so it
probably ate as it held its prey in its limbs. Kerygmachela
was
originally reconstructed with two rearward pointing cerci, however,
later studies have shown that there was actually only one. This
single cerci was easily as long as the body.
Another
similar arthropod that has also been found in the same area as
Kerygmachela is Pambdelurion,
although it appears to have had quite a
different lifestyle.
Further reading
- A Cambrian gilled lobopod from Greenland - Nature 364 (6439): 709 -
Graham E. Budd - 1993.
- The morphology and phylogenetic significance of Kerygmachela
kierkegaardi Budd (Buen Formation, Lower Cambrian, N
Greenland) -
Transactions-Royal Society of Edinburgh 89: 249–290 - Graham E. Budd -
1999.
- Brain and eyes of Kerygmachela reveal
protocerebral ancestry of the
panarthropod head. - Nature Communications. 9 (1): 1019. - Tae-Yoon S.
Park, Ji-Hoon Kihm, Jusun Woo, Changkun Park, Won Young Lee, M. Paul
Smith, David A. T. Harper, Fletcher Young, Arne T. Nielsen &
Jakob Vinther - 2018.