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Fig. 11 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 11. Terenochiton nomurai, holotype (NSMT-Mo79027), Japan, Okinawa, Iriomote Island. 6.0 mm. A – arrangements of granules and aesthete pores (schematic drawing); B – dorsal girdle scale; C – intersegmental needle; D – marginal scale; E – ventral scale; F, G – ventral scale near girdle margin; H – central and first lateral teeth (semi-schematic drawing); I, J – head of major lateral tooth. Scale bars: 10 µm for H–J, 20 µm for B, D–G, 100 µm for C.

Fig. 9 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 9. Terenochiton nomurai, holotype (NSMT-Mo79027), Japan, Okinawa, Iriomote Id. BL 6.0 mm. A – valve I, ventral view; B – close up of square portion in A, showing rudiment of insertion plate; C – valve II, ventral view; D – close up of square portion in C, showing rudiment of insertion plate; E – same rudiment in D, slightly anterior view; F, G – valve VIII, rudiment of insertion plate, ventral and ventro-lateral views. r – rudiment of insertion plate.

Fig. 7. Terenochiton nomurai, A in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 7. Terenochiton nomurai, A – holotype (NSMT-Mo79027), Japan, Okinawa, Iriomote Island. BL 6.0 mm; B – paratype (NSMT-Mo 79028), Japan, Okinawa, Kuroshima Island. BL 3.4 mm. A, B – whole animals, arrow head indicating intersegmental needle.

Fig. 10. Terenochiton nomurai, A, B, D, E in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 10. Terenochiton nomurai, A, B, D, E – holotype (NSMT-Mo79027), Japan, Okinawa, Iriomote Island. BL 6.0 mm; C, F – paratype (NSMT-Mo 79028), Japan, Okinawa, Kuroshima Id. BL 3.4 mm. A – dorsal girdle scales; B, E – head of major lateral teeth; C – radula, dorsal view; D – central part of radula; F – marginal part of radula.

Fig. 5 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 5. Leptochiton pumilus, paratype (MNHM-IM-2013-850), Papua New Guinea, Madang, east of the airport, Expédition PAPUA NIUGINI, stn PD4, BL 2.0 mm. A – scales around girdle margin; B – dorsal scales and intersegmental needle.

Fig. 3 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 3. Leptochiton pumilus, holotype (MNHM IM-2013-2051), Papua New Guinea, Kranket Island, Expédition PAPUA NIUGINI, stn PB12. BL 2.5 mm. A – dorsal girdle scales; B – central portion of radula, dorsal view; C – ditto, posterior view; D – central portion of radula, close up.

Fig. 10 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 10. Onithochiton maklayi, holotype (ZISP 2305), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 36.0 mm. A – valve IV, surface of tegmentum in central and lateral areas; B – dorsal spicules and needles; C – dorsal spicules and needles, marginal needles and ventral scales; D – dorsal spicules.

Fig. 8 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 8. Lucilina nemirkoae, holotype (ZISP 2304), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m. BL 7.0 mm. A – dorsal spicules and needles; B, D – ventral scales; C – dorsal spicules, needles and marginal needles.

Fig. 9 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 9. Onithochiton maklayi, holotype (ZISP 2305), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 36.0 mm. A – head valve, dorsal view; B – valve II, dorsal view; C – valve V, dorsal view; D – tail valve, dorsal view; E – tail valve, lateral view; F – valve IV, surface of tegmentum in central and lateral areas; G – valve VII, ventral view; H – valve VIII, ventral view; I – valve IV, rostral view.

Fig. 5 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 5. Lucilina insueta, holotype (ZISP 2303), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 20 mm. A, C – ventral scales; B – radula; D – head of major lateral tooth of radula.

Fig. 2 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 2. Rhyssoplax venusta (ZISP 2302), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m, BL 14 mm. A – dorsal scales; B – ventral spicules near margin; C – ventral spicules, in middle; D – heads of major lateral teeth.

Fig. 1 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 1. Rhyssoplax venusta (ZISP 2302), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m, BL 14 mm. A – head valve, dorsal view; B – valve V, dorsal view; C – tail valve, dorsal view; D – valve IV, ventral view; E – surface of tegmentum in central and lateral areas; F – tail valve, lateral view; G – valve V, rostral view.

Fig. 4 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 4. Leptochiton pumilus, paratype (MNHM-IM-2013-850), Papua New Guinea, Madang, east of the airport, Expédition PAPUA NIUGINI, stn PD4, BL 2.0 mm (A–D); paratype (MNHM-IM-2013- 49553), the Philippines, Bohol Island, Maribohoc Bay, PANGLAO 2004, stn P1, BL 2.0 mm (E). A – valve III, dorsal view; B – valve III, rostral view; C – portion of radula, dorsal view; D – valve III, detail of tegmentum surface of central area; E – central portion of radula, dorsal view.

Fig. 4 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 4. Lucilina insueta, holotype (ZISP 2303), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 20 mm. A – valve IV, lateral view; B – tail valve, ventral view. Arrows show slits of insertion plates; C – dorsal and ventral scales; D – dorsal scals.

Fig. 7 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 7. Lucilina nemirkoae, holotype (ZISP 2304), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m. BL 7.0 mm. A – valve IV, ventral view, insertion plate without pectination; B – tail valve, ventral view; C – valve IV, lateral view, insertion plate and apophyses without pectination; D – head of major lateral tooth of radula.

Fig. 12 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 12. Color images of species of genera Onithochiton, Rhyssoplax and Lucilina. A – Onithochiton maklayi, holotype (ZISP 2305), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 36.0 mm; B – Rhyssoplax venusta (ZISP 2302), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m, BL 14 mm; C – Lucilina insueta, holotype (ZISP 2303), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 20 mm.

Fig. 3 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 3. Lucilina insueta, holotype (ZISP 2303), Papua New Guinea, Astrolabe Bay, Bilibili Island, intertidal, rocks, BL 20 mm. A – head valve, dorsal view; B – valve V, dorsal view; C – tail valve, dorsal view; D – valve IV, ventral view; E – surface of tegmentum in central and lateral areas; F – tail valve, lateral view; G – valve V, rostral view.

Fig. 6 in New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea

Fig. 6. Lucilina nemirkoae, holotype (ZISP 2304), Papua New Guinea, Bismarck Archipelago, Manus Island, 1 m. BL 7.0 mm. A – head valve, dorsal view; B – valve II, dorsal view; C – valve V, dorsal view; D – tail valve, dorsal view; E – valve IV, ventral view; F – surface of tegmentum in central and lateral areas; G – tail valve, lateral view; H – valve V, rostral view.

Fig. 8 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 8. Terenochiton nomurai, holotype (NSMT-Mo79027), Japan, Okinawa, Iriomote Island. BL 6.0 mm. A – valve I, dorsal vies; B – valve IV, dorsal view; C – valve IV, rostral view; D – valve VIII, dorsal view; E – valve VIII, lateral view; F – valve I, detail of tegmentum surface; G – valve IV, detail of tegmentum surface of central area, arrow head showing tubular extension for aesthete pore.

Fig. 2 in Two new species of the family Leptochitonidae (Mollusca: Polyplacophora) from the tropical and subtropical shallow waters of the West Pacific

Fig. 2. Leptochiton pumilus, paratype (MNHM IM-2013-49553), the Philippines, Bohol Island, Maribohoc Bay, PANGLAO 2004, stn P1, BL 2.5 mm (B, D); holotype (MNHM IM-2013-2051). Papua New Guinea, Kranket Island, Expédition PAPUA NIUGINI, stn PB12, BL 2.5 mm (A, C). A – whole animal, lateral view; B – dorsal girdle scales; C – dorsal scales and intersegmental spicule; D – scales around girdle margin.