. Cephalopoda. Cephalopoda. with the characteristics of the family, and the slight resemblance to the Onychoteuthidae is not important as it is restricted almost entirely to general characters of the Oegopsida. The gladius of Lycoteuthis (Figure 125) has a reduced flag, like that of Onychoteuthis, but this is not typical for the Lycoteuthinae [see p. 266) or for the Onychoteuthidae (q. v.). This is thus a distinctly atypical similarity (p. 25) or convergence. On the other hand, the buccal funnel, radula and ophthalmic luminous organs of all Lycoteuthinae show the specific characters of the Eno
. Cephalopoda. Cephalopoda. with the characteristics of the family, and the slight resemblance to the Onychoteuthidae is not important as it is restricted almost entirely to general characters of the Oegopsida. The gladius of Lycoteuthis (Figure 125) has a reduced flag, like that of Onychoteuthis, but this is not typical for the Lycoteuthinae [see p. 266) or for the Onychoteuthidae (q. v.). This is thus a distinctly atypical similarity (p. 25) or convergence. On the other hand, the buccal funnel, radula and ophthalmic luminous organs of all Lycoteuthinae show the specific characters of the Enoploteuthidae, which therefore appear to be a branch of the stem of Oegopsida. The following review completes the above remarks and proves that the Lycoteuthinae belong to the Enoploteuthidae and the monotypical difference of this family from the Onychoteuthidae:. FIGURE 125. Gladius and radula of Ly CO teu thi s diadema (Chun, 1910, Plate 3, Figures 6,7,8,15). a) Radula, transverse rovv of teeth (highly magnified).. As is characteristic for all Enoploteuthidae, the 3 median teeth are also unicuspid and simplified, as in the Sepioidea () and in contrast to other Teuthoidea (cf. Plates XIV and XV). b) Ventral view of gladius, 2x. The flag parts (lateral plates) are narrow and almost completely reduced,especially in the posterior part. The cone is small but distinct; it is shown in lateral view in c) (optical section) and at a higher magnification in d). 1. The buccal funnel is strongly colored and consists of 8 parts; the ventral supports are attached to the outer side of the ventral arms. 2. The 6 buccal pockets of the 3rd pair are particularly deep ("water pores"; cf. Pyroteuthinae, p. 266). 3. The ventral inner edges of the upper 3 pairs of arms have strong, wide protective margins with sharply projecting supports. 4. The suckers of the club have a uniformly toothed distal margin. The eye bulb bears a ventral row of 5 luminous organs which closely resemble those
Size: 1078px × 2318px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectcephalopoda
