TY - JOUR
T1 - A revision of brain composition in Onychophora (velvet worms) suggests that the tritocerebrum evolved in arthropods
AU - Mayer, Georg
AU - Whitington, Paul Mcdonald
AU - Sunnucks, Paul
AU - Pflueger, Hans-Joachim
PY - 2010
Y1 - 2010
N2 - Background: The composition of the arthropod head is one of the most contentious issues in animal evolution. In particular, controversy surrounds the homology and innervation of segmental cephalic appendages by the brain. Onychophora (velvet worms) play a crucial role in understanding the evolution of the arthropod brain, because they are close relatives of arthropods and have apparently changed little since the Early Cambrian. However, the segmental origins of their brain neuropils and the number of cephalic appendages innervated by the brain-key issues in clarifying brain composition in the last common ancestor of Onychophora and Arthropoda-remain unclear.
AB - Background: The composition of the arthropod head is one of the most contentious issues in animal evolution. In particular, controversy surrounds the homology and innervation of segmental cephalic appendages by the brain. Onychophora (velvet worms) play a crucial role in understanding the evolution of the arthropod brain, because they are close relatives of arthropods and have apparently changed little since the Early Cambrian. However, the segmental origins of their brain neuropils and the number of cephalic appendages innervated by the brain-key issues in clarifying brain composition in the last common ancestor of Onychophora and Arthropoda-remain unclear.
UR - http://www.biomedcentral.com/1471-2148/10/255/abstract
U2 - 10.1186/1471-2148-10-255
DO - 10.1186/1471-2148-10-255
M3 - Article
SN - 1471-2148
VL - 10
SP - 1
EP - 28
JO - BMC Evolutionary Biology
JF - BMC Evolutionary Biology
ER -