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Fig. 6 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 6. Hectocotylus (left arm I) of Sepiola boletzkyi sp. nov., holotype, ♂, ESFM-CEP/1994-1. Abbreviations: a–d = suckerless stalks forming the copulatory apparatus proper (a = ventral-most, d = dorsal-most one, i.e. tubercle); * = lobe in the dorsal row of suckers, 1–11 = sequence of heteromorphous suckers in the dorsal row of distal part. A. Oral view; the arm is slightly tilted, with the tip towards the observer, in order to show details (lobe and small suckers 1–2), otherwise hidden by the four suckerless stalks of the copulatory apparatus. Basal part: only the two ventral suckers are visible, the dorsal one is missing as a result of damage. Copulatory apparatus: the tubercle (d) partially hides the lobe in the dorsal row (*). Distal part: the heteromorphous suckers in the dorsal row are 1–2 small, 3–8 enlarged, 9 small, 10–11 enlarged; the remaining suckers are regular; note that some suckers (2, 3 and 7) are displaced towards the centre of the arm, i.e., not aligned with the others of their same row; it is not known whether this is natural or caused by preservation. B. Inner-lateral view of copulatory apparatus; the lobe (*) forms a groove with the tubercle (d). C. Oblique inner-lateral view of copulatory apparatus; two barely visible longitudinal lines on the lobe (*) are likely fusion lines between adjacent stalks forming it. Scale bars = 1 mm.

Fig. 3 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 3. Right tentacle club of Sepiola boletzkyi sp. nov., holotype, ♂, ESFM-CEP/1994-1. A. Oral view (drawing). B. Oral view. C. Dorsal view. Scale bar = 1 mm.

Fig. 7 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 7. Bursa copulatrix of Sepiola boletzkyi sp. nov., paratype, ♀, ESFM-CEP/1994-2. A. Ventral view; the dashed line encloses the distal surface of the large fungiform process. B. Oblique ventral view; the fungiform process sticks out of the bursa, laterally to the folds convergence; an arrow points to the longitudinally folded stalk of the process. Scale bar for both figures = 1 mm.

Fig. 5 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 5. Beaks of Sepiola boletzkyi sp. nov., paratype, ♀, ESFM-CEP/1994-2. A. Upper beak, lateral view. B. Lower beak, lateral-oblique view. C. Lower beak, upper (= ventral) view. Scale bar = 1 mm.

Fig. 2 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 2. Sepiola boletzkyi sp. nov., holotype, ♂, ESFM-CEP/1994-1. The hectocotylus was removed for closer examination. A. Dorsal view. B. Ventral view. Scale bar = 1 cm.

Fig. 1 in Description of a new sepioline species, Sepiola boletzkyi sp. nov. (Cephalopoda: Sepiolidae), from the Aegean Sea

Fig. 1. Schematic rendering of the general hectocotylus (left arm I) in the Sepiola atlantica group sensu Naef (1923) (after Bello 1995 , modified).

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Fig. 1 in Mastigotragus, a new generic name for Mastigoteuthis pyrodes Young, 1972 (Cephalopoda: Mastigoteuthidae)

Fig. 1. Longitudinal section through an integumental photophore of Mastigoteuthis agassizii Verrill, 1881 (modified from Chun 1910).

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Fig. 2 in Mastigotragus, a new generic name for Mastigoteuthis pyrodes Young, 1972 (Cephalopoda: Mastigoteuthidae)

Fig. 2. Photomicrographs of the slightly damaged integument of the head (modified from Vecchione et al. 2004–2014). A. Mastigoteuthis agassizii. B. "Mastigoteuthis" pyrodes [= Mastigotragus pyrodes]. – Large, white arrows indicate photophores; only two photophores are visible in A but seven are visible in B. Small, white arrows indicate two of the many "white spherical structures." Black arrows indicate ringed chromatophores in A and typical chromatophores in B.

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Fig. 12 in Evolution of the hectocotylus in Sepiolinae (Cephalopoda: Sepiolidae) and description of four new genera

Fig. 12. Hectocotylus of Inioteuthis japonica Verrill, 1881. A. Oral view. B. Lateral view. The brackets P and D comprise the proximal and distal structures of the copulatory apparatus ventral side, respectively; an X marks the longitudinal crest between the two structures. The curved line embraces the swollen dorsal margin of the copulatory apparatus, whose modified pedicels (indicated by arrows) look like trabeculae holding the joining web. Scale bars: 2 mm.

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Fig. 15 in Evolution of the hectocotylus in Sepiolinae (Cephalopoda: Sepiolidae) and description of four new genera

Fig. 15. Pair of dorsal arms of Sepiola pfefferi Grimpe, 1921; the hectocotylus is on the right-hand side. The letters V indicate the ventral modified pedicels of the copulatory apparatus merging with the muscular ridge (square bracket) arising from the lateral side of basal part (after Goud & de Heij 2012, modified).

Figure 10 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 10. Development of fin shape between juvenile and sub-adult stages (stages E and F) of Teuthowenia pellucida. Specimen maturation from left to right.

Figure 8 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 8. Arm modifications in adult Teuthowenia pellucida. Brachial end organ (A) on the tips of all arms in mature females; (B) four series of small suckers on the distal tip of arms I and II in adult males. Scale bar = 1 cm.

Figure 6 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 6. Simplified diagram of eye photophores and lens from (A) anterior view and (B) ventral side of the eye in adult Teuthowenia pellucida.

Figure 4 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 4. Schematic diagram of Teuthowenia pellucida tentacle showing paired zig-zag sucker pattern on stalk, visible from Stage D onwards.

Figure 2 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 2. Development of Teuthowenia pellucida eyes through ontogeny showing both anterior (right) and lateral (left) perspective. Eye presented from (A) stage A; (B) stage B; (C) stage C; (D) stage D; (E) stage E and F; (F) adult (anterior); (G) adult (ventral). Scale bar = 1 mm.

Figure 12 in Ontogeny of the deep-sea cranchiid squid Teuthowenia pellucida (Cephalopoda: Cranchiidae) from New Zealand waters

Figure 12. Difference in visible rachis shape at anterior dorsal midline of (A) Teuthowenia; (B) Megalocranchia; (C) Liguriella (ML range: 17–29 mm).

Figure 6 in Morphology and morphometry of Doryteuthis plei (Cephalopoda: Loliginidae) statoliths from the northern shelf off São Paulo, southeastern Brazil

Figure 6. Comparison between squid statoliths at the same stage of maturity. (A) Doryteuthis plei; (B) Doryteuthis sanpaulensis. The bluish appearance of the D. sanpaulensis statolith is probably due to refractive properties, because it is more transparent than the D. plei statolith.

Figure 3 in Observations on age and reproduction of the oceanic squid Ancistrocheirus lesueurii (d'Orbigny, 1842) (Cephalopoda: Ancistrocheiridae)

Figure 3. Ancistrocheirus lesueurii. (A) Statolith section of a mature intersexual male (ML 275 mm) in which 761 increments could be counted. The areas in boxes are enlarged in B, C and D, where B is the nucleus, C shows regular increments past the mid part of the rostrum and D shows the increments in the periphery of the rostrum.

Figure 4 in Morphology and morphometry of Doryteuthis plei (Cephalopoda: Loliginidae) statoliths from the northern shelf off São Paulo, southeastern Brazil

Figure 4. Morphometric values of the Doryteuthis plei statoliths into categories (M) males, (F) females, (I) immature, (II) maturing, (III) mature and (IV) spent by statolith measures (SL) statolith length, (DL) dome length, (ÂR) angle of the rostrum and (ÂD) angle of the dome.