Nodular ultrasculpture was discovered in Cyclopterus lumpus, surrounding the denticles on dermal tubercles and forming a ring around the base of the presumed acrodin cap of jaw teeth.
The genus Cyclopterus is represented by just one species, the lumpsucker Cyclopterus lumpus Linnaeus, 1758, while the genus Liparis contains 71 species considered valid by Chemova (2008), including the one studied here, the sea snail Liparis liparis (Linnaeus, 1766).
Both male and female specimens of Cyclopterus lumpus were examined, along with one specimen of unidentified sex of C.
Representative types of ossicles of Cyclopterus lumpus and Liparis liparis are shown in Fig.
The morphology, variability, ultrasculpture and inferred growth of small dermal and other ossicles of Cyclopterus lumpus (lumpsucker) and Liparis liparis (sea snail) from the Baltic Sea can be compared with those seen in three genera and species (Triglopsis quadricornis--fourhorn sculpin, Myoxocephalus scorpius--shorthorn sculpin, Taurulus bubalis--longspined bullhead) of the related cottoid family Cottidae (sculpins) as described by Marss et al.
2010) and Cyclopterus lumpus have a few rows of dermal ossicles along with scattered ones.