Twait shad destruction. Conservation of this species is covered by Appendix III of the Bern Convention and Appendix II and V of the European Community Habitats Directive. The twait shad is a typical herring-type fish and much resembles the allis shad. It has no lateral line and the belly is more rounded than that of the sprat and Baltic herring. The gill cover is ridged and the caudal peduncle has large, plate-like scales. This fish is more colourful than the Baltic herring. The back is a bluish green colour and the head brownish with a golden tinge on the operculum. The flanks
Operculum (brain) insula. This process is called opercularization. Opinions differ on whether Albert Einstein’s brain possessed parietal opercula. Falk, et al. claim that the brain actually did have parietal opercula, while Witelson et al. claim that it did not. Einstein's lower parietal lobe (which is involved in mathematical thought, visuospatial cognition and imagery of movement) was 15% larger than average. Figure 9 of Falk 2013 is a photograph of Einstein's right insula after removal of the operculum. (Falk 2013) Operculum (brain) In human brain anatomy, an operculum (Latin, meaning "little lid") (pl. opercula), may refer to the frontal, temporal, or parietal operculum,