FIGURE 8 Dendronotus elegans. External and internal morphology. a in A synoptic review of the family Dendronotidae (Mollusca: Nudibranchia): a multilevel organismal diversity approach

FIGURE 8 Dendronotus elegans. External and internal morphology. a: living specimen ZMMU Op-713 from Greenland, near East Atlantic North American coast; b: jaw, same specimen; c; posterior part of radula, general overview, same specimen; d: close up of smooth central teeth, same; e: close up of lateral teeth, same; f: living specimen ZMMU Op-714 (as "D. niveus") from the White Sea (subarctic); g: jaw, same specimen; h: masticatory edge of the jaws, same; i: posterior part of radula, general overview, same specimen; j: close up of smooth central teeth, same; k: living specimen ZMMU Op-715 from the Laptev Sea (Arctic); l: jaw, same specimen; m: posterior part of radula, close up of smooth central teeth, same; n: lateral teeth, same. o: discoid prostate with numerous alveols (which considerably exceed the considerably underestimated number presented in the first description of D. niveus), same specimen; Scale bars: b, l, 1mm; c: 300 µm; d, h–j, m: 100 µm; g: 1000 µm; e, n: 30 µm. PHOTOGRAPHS BY O. ZIMINA (A, K) AND T. KORSHUNOVA (F). SEM MICROGRAPHS BY A. MARTYNOV