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Figure 4. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 4. Maja squinado Herbst, 1788, mandibular palp. (A) megalopa, maxillule. (B) first zoea; (C) second zoea; (D) megalopa. Scale bar of A550 Mm; B–D5100 Mm.

Figure 3. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 3. Maja squinado Herbst, 1788, antennule. (A) first zoea; (B) second zoea; (C) megalopa. Antenna. (D) first zoea; (E) second zoea; (F) megalopa. Scale bars5100 Mm.

Figure 10. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 10. Maja squinado Herbst, 1788, megalopa. (A) sternum and pereiopods; (B) detail of the dactyl of the pereiopod 3; (C) detail of the dactyl of the pereiopod 5. Scale bar5500 Mm.

Figure 2. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 2. Maja squinado Herbst, 1788, megalopa. (A) megalopa, dorsal view; (B) megalopa, lateral view. Scale bar51000 Mm.

Figure 8. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 8. Maja squinado Herbst, 1788, third maxilliped. (A) second zoea; (B) megalopa. Scale bar5250 Mm.

Figure 1. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 1. Maja squinado Herbst, 1788, carapace. (A) first zoea, lateral view; (B) first zoea, frontal view; (C) second zoea, lateral view. Scale bar5500 Mm.

Figure 6. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 6. Maja squinado Herbst, 1788, first maxilliped. (A) first zoea; (B) second zoea; (C) megalopa. Scale bars5250 Mm.

Figure 7. Maja squinado Herbst, 1788 in The larval development of Maja squinado and M. brachydactyla (Decapoda, Brachyura, Majidae) described from plankton collected and laboratory-reared material

Figure 7. Maja squinado Herbst, 1788, second maxilliped. (A) first zoea; (B) second zoea; (C) megalopa. Scale bars5250 Mm.

FIGURE 14 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 14. Comparisions of the copulatory appendages in a selection of Euconchoecia and Bathyconchoecia species: A. Euconchoecia aff. pacifica, original drawing, East China Sea. B. Euconchoecia aff. elongata, original drawing, Celebes Sea. C. Euconchoecia aff. aculeate, original drawing, Japan Sea. D. Scottoecia darcythompsoni, from Angel 2012, Fig. 5J. E. Bathyconchoecia sagittarius, from Deevey 1968 Fig.10c. F. Bathyconchoecia n. sp. original drawing, Southern Ocean sp.'L'. G. Bathyconchoecia n. sp. original drawing, Southern Ocean sp.'B'. Scales are in millimetres. The main differences are: 1. Euconchoecia have several oblique muscles in the main body of the appendage, Bathyconchoecia have few if any oblique muscles in the body of the appendage; 2. The appendages are characteristically paddle-shaped in Euconchoecia, but the shapes vary extensively between the different Bathyconchoecia species.

FIGURE 13 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 13. Comparisons of the caudal furcae in a selection of Euconchoecia and Bathyconchoecia species: A. Euconchoecia chierchiae female, original drawing Discovery station 8281, 50-0m; B. Euconchoecia elongata sensu Tseng 1969, from Tseng 1969 fig. 3j. C. Euconchoecia maimai male, from Tseng 1969 fig. 2n. D. Bathyconchoecia aff. paulula female, from Kornicker 1991 fig. 19g. E. Bathyconchoecia longispinata female, from Ellis 1987 (fig.3e); F. Bathyconchoecia galerita female, from Deevey 1968 (fig. 9e); G. Bathyconchoecia sagittarius male, from Deevey 1968 (fig. 10d). Scales are in millimetres. The main differences indicated by the arrows on 10A are: 1. Euconchoecia have seven pairs of spines compare with eight pairs in most Bathyconchoecia; 2. Bathyconchoecia generally have four septa in the first pair of caudal furca spines; Euconchoecia species have none; 3. The unpaired seta in most Bathyconchoecia species is relatively long. Note Chavtur (personal communication) considers that B. aff. paulula Kornicker (1991) is a novel species).

FIGURE 9 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 9. Comparisons of the toothed edges and lists of the mandibles in a selection of Euconchoecia and Bathyconchoecia species: A. Euconchoecia chierchiae (Discovery station 8281#17); B. Euconchoecia pacifica, Chavtur pers com; C. Euconchoecia aff. pacifica Japan Sea; D. Scottoecia foveolata Discovery station 7709#72; E. Bathyconchoecia n. sp. Southern Ocean 'E' AnDeep lll; F. Bathyconchoecia septemspinosa male Discovery station 8012; G. Bathyconchoecia kornickeri Discovery station 9541#21; Scales are in millimetres.

FIGURE 8 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 8. Comparisons of the mandibular coxale toothed edges and lists of a selection of Euconchoecia and Bathyconchoecia species: A. Euconchoecia chierchiae Discovery station 8281 #17; B. Euconchoecia aff. pacifica Japan Sea; C. Euconchoecia omanensis from Graves, 2011 fig. 12B; D. Bathyconchoecia foveolata Discovery station 7709#72; 60° 06.54'N; E. Bathyconchoecia latirostris female (original drawing of type specimen); F. Bathyconchoecia n. sp. Southern Ocean 'B' AnDeep1; G. Bathyconchoecia n. sp. Southern Ocean 'C' AnDeep1; Scales are in millimetres. The main differences indicated are the marked contrasts in the structures of the cutting teeth; note too the diversity in their structure in the various Bathyconchoecia species.

FIGURE 7 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 7. Comparisons of the mandibles in a selection of Euconchoecia and Bathyconchoecia species: A. Euconchoecia chierchiae Discovery station 8281#17; B. Euconchoecia hormuzensis from Graves, 2011, fig 19C; C. Euconchoecia omanensis from Graves, 2011, fig 12A; D. Bathyconchoecia n sp 'G' AnDeep lll; E Bathyconchoecia n. sp. 'B' AnDeep l; F. Bathyconchoecia latirostris, original drawing of type specimen). Scales are in millimetres. The main differences indicated by the arrows are: 1. Exopodite represented by a single plumose seta in Euconchoecia and by two or three in Bathyconchoecia; 2. Terminal disto-dorsal seta on first endopodite segment short in Euconchoecia and long in Bathyconchoecia; 3. Two terminal disto-dorsal setae in Euconchoecia but three in Bathyconchoecia; 4. Longest terminal seta much longer in Bathyconchoecia (see Table 2).

FIGURE 6 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 6. Comparisons of the hook appendages on the left and right male second antennae in a some Euconchoecia, and Bathyconchoecia and Scottoecia species: A. Euconchoecia chierchiae (Discovery station 8281#17). B. Euconchoecia aff. elongata (Celebes Sea). C. Euconchoecia hormuzensis from Graves, 2011, fig.19A,B. D. Scottoecia darcythompsoni from Angel 2012, fig. 5F,G. E. Bathyconchoecia paulula from Deevey 1968 figure 1i. (left not shown). F. Bathyconchoecia n. sp. Southern Ocean 'B' AnDeep l; (left not shown). G. Bathyconchoecia n. sp. Southern Ocean 'G' AnDeep lll. Scales are in millimetres. The main differences indicated by the arrows on 5A are: 1. Euconchoecia right hook appendages are characteristically sharply angled; 2. The left hook appendages of the Euconchoecia species are reduced and lack the hook sector.

FIGURE 4 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 4. Comparisons of the first antennae in a selection of Euconchoecia and Bathyconchoecia and Scottoecia species (and frontal organs in Euconchoecia species): A. Euconchoecia chierchiae ♀.B. Euconchoecia aff. elongata ♂ (Celebes Sea). C. Euconchoecia pacifica ♀ (Japan Sea). D. Bathyconchoecia paulula ♂ from Deevey 1986, fig. 1a. E. Bathyconchoecia sagittarius ♀ from Angel 1973, fig. 1A. F. Scottoecia darcythompsoni ♂ from Angel 2012, fig. 5D. Scales are in millimetres. The main differences (as indicated by the arrows in 1A) are: 1. The absence of a frontal organ in Bathyconchoecia; 2. The length of the dorsal seta; 3. The lengths of the pad setae.

FIGURE 3 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 3. Female carapaces of a selection of Bathyconchoecia and Scottoecia species: A. Bathyconchoecia paulula from Deevey 1968, fig. 1a. B. Bathyconchoecia septemspinosa from Angel 1970, fig. 7A.C. Scottoecia darcythompsoni Scott 1909, from Angel 2012, fig. 7A. D. Bathyconchoecia sagittarius Deevey 1968, from Angel 1973, fig. 1A. E. Bathyconchoecia n. sp. B; redrawn from Angel 2010, fig.1. F. Bathyconchoecia foveolata; redrawn from Deevey 1968, fig. 12a. Scales are in millimetres.

FIGURE 2 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 2. Photograph of a freshly caught female Euconchoecia chierchiae Müller, 1890 from the upper 100 m at 33.045°N 75.033°W near Bermuda, Carapace length 1.2 mm. Photograph by Professor Rus Hopcroft.

FIGURE 1 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 1. Female carapaces of a selection of Euconchoecia species. A. Euconchoecia aff. elongata Great Barrier Reef; B. Euconchoecia chierchiae, Atlantic near Bermuda; C. Euconchoecia aff. pacifica, Japan Sea; D. Euconchoecia shengwai, East China Sea; E. Euconchoecia maimai, East China Sea; F. Euconchoecia aff. elongata. Celebes Sea. Scales in millimetres.

FIGURE 12 in Bathyconchoeciinae, a new subfamily of deep oceanic planktonic halocyprid Ostracod (Myodocopa, Ostracoda)

FIGURE 12. Comparisons of the male sixth limbs in a selection of Euconchoecia and Bathyconchoecia species: A. Euconchocia chierchiae Discovery Station 8281#17. B. Euconchoecia aff. pacifica Japan Sea Sea. C. Euconchoecia aff. aculeata Peru Current. D. Euconchoecia aff elongata East China Sea. E. Bathyconchoecia n. sp. Southern Ocean 'J'. F. Bathyconchoecia n.sp Atlantic'B'. G. Bathyconchoecia foveolata from Deevey 1968 fig. 12c. H. Bathyconchoecia nodosa from Poulsen 1972, fig. 1i. I. Bathyconchoecia longispinata from Ellis 1987, fig. 2E). Scales are in millimetres. The main differences indicated are: 1. The long subequal terminal setae in Euconchoecia, and compared with the unequal terminal setae in Bathyconchoecia, note in G and I the unusually long dorsal setae; 2. The dorsal seta in the protopodite that is a relict of the exopodite is short in Euconchoecia, but long in Bathyconchoecia; 3. There are one or two ventral setae on the first endopodite segment of Euconchoecia, contrasting with the three or more in Bathyconchoecia. Note the multiple dorsal setae on the penultimate segment in Fig. 10 F.