Table 1.

The two basic subtypes of non-subplate pioneer neurons in mice and rats.

Cell type	Rodent species	Markers	Localization
			Preplate stage	After preplate partition
Non-SP pioneer neurons: L1 subtype	Rat	CB and CR	Preplate	MZ
		L11
		Tbr1
		No Reelin
	Mouse	No CB, no CR	Preplate	MZ
		L11
		Tbr1
		No Reelin
Non-SP pioneer neurons: TAG-1/cntn2 subtype	Rat, mouse	TAG-1/cntn2	Preplate	Upper CP2
		Tbr1
		No Reelin

This Table summarizes the markers that were useful for defining two different types of non-subplate pioneer cells in rodents, based on the results shown in this study. CP, cortical plate; MZ, marginal zone; SP, subplate.

¹L1 protein accumulated transiently in neuron perikarya, and then it translocated into the projecting axons.

²This is one important exception: pioneer TAG-1⁺ cells were located first in the preplate and thereafter in the upper tier of the cortical plate and in the subplate (Wolfer et al., 1994; Morante-Oria et al., 2003; our present results).