Figure 4. A, B in A new species of the genus Lightiella: the first record of Cephalocarida (Crustacea) in Europe

Figure 4. A, B, light micrographs of second maxilla (A) and thoracopod 5 (B) of Lightiella magdalenina sp. nov. showing the same morphological organization. Protopod (Pr) characterized by 6 enditic processes (Pe) and 1-segmented epipod (Ep) with 4 long plumose setae. 5-segmented endopod (En) and 2-segmented exopod (Ex) with a spine (S) that distinguishes the distal group of 4 long setae (arrow). Scale bars: A, 56 µm; B, 60 µm. C, high magnification of protopodal endites (Pe) armed with spines and setae. Scale bar = 25 µm. D, detail of the last two segments of endopod. Segment 4 characterized by the small seta on the inner corner (arrow) and 3 long setae on the outer corner. The last segment bears 4 claws, three of which are large and indented; the last one is small, smooth and located on the medial side of the base of the outermost claw (arrowhead). Scale bar = 15 µm.