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This closeup view of left uropod 3 seen from the dorsal aspect of the left side shows the two apical teeth on the lateral ramus, and also shows the paddlelike inner (medial) ramus.
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Caprella andreae head and gnathopodsCaprella andreae head and gnathopodsSpecimen: National Museum of Natural History, Washington DC: (NMNH) 113051
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Figure 6.Parelasmopus setiger Chevreux, 1901, male, (UKMMZ-1527), 10.3 mm. Pulau Hantu, Singapore. Scale for UL, LL, MX1, MX2, MD(R), MD(L), = 0.25 mm; MP = 0.5 mm.
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This ventral view of the right uropod #2 shows the spine which extends from the base (peduncle) out between the two rami.
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Caprella carina pereopods 6 + 7Caprella carina pereopods 6 & 7Specimen: National Museum of Natural History, Washington DC: (NMNH) 134426-7
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Figure 7.Parelasmopus setiger Chevreux, 1901, female, (UKMMZ-1528), 9.8 mm. Pulau Hantu, Singapore. Scale for A1 = 1 mm; A2, G1, G2 = 0.5 mm.
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In this dorsal view of the tail all three uropods plus the telson can be seen. The telson is short and evenly rounded.
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Caprella carina maleCaprella carina maleSpecimen: National Museum of Natural History, Washington DC: (NMNH) 134426-7
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Figure 8.Parelasmopus setiger Chevreux, 1901, female, (UKMMZ-1528), 9.8 mm. Pulau Hantu, Singapore. Scale for P3, P4 = 0.5 mm; P5, P6, P7 = 1 mm.
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Neither antenna has an accessory flagellum, which would be a short branch based beside the main flagellum (the flagellum is the flexible, whiplike distal portion of the antennae, with many short articles which allow it to bend easily). The articles at the base of the flagellum of the second antenna are not fused together. In this photo the first antennae are to the left and the second antennae are to their right, curled around the first two pereopod legs (called gnathopods)
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Caprella carina gnathopodsCaprella carina gnathopodsSpecimen: National Museum of Natural History, Washington DC: (NMNH) 134426-7
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Figure 9.Parelasmopus setiger Chevreux, 1901, female, (UKMMZ-1528), 9.8 mm. Pulau Hantu, Singapore. Scale for UL, LL, MX1, MX2, MD(R), MD(L), MP, T = 0.25 mm; UI, U2, U3 = 0.5 mm.
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This is a view of the left gnathopods (#1 is to the left, #2 next to it to the right). Gnathopods have 7 segments, the last two of which form a (usually subchelate) claw. In this view the 7th segment (the movable tip of the claw) is folding away from the view plane. Segment 5 of gnathopod 1 is longer than segment 6.
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Caprella carina femaleCaprella carina femaleSpecimen: National Museum of Natural History, Washington DC: (NMNH) 134426-7
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In this view it can be seen that the last two pereopods (walking legs), # 6 and 7, are of similar length, but #7 is slightly longer. A live video of this individual can be viewed here.
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Caprella danilevskii male showing gnathopod 2Caprella danilevskii male showing gnathopod 2Specimens: National Museum of Natural History, Washington DC: (NMNH) 305410-305411
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This female was carrying at least 11 larvae in her oostegite brood bpouch, Two of the larvae are shown above. They are about 3 mm long plus the antennae. The young appeared to be sticking their heads (cephalon) out and peering out from the pouch as the mother moved around, so I am guessing they are nearing the time when they can safely leave the mother.
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Aeginella spinosa GnathopodsGnathopods I and II of Aeginella spinosa specimens (National Museum of Natural History, Washington DC: (NMNH) 34786; Id J. McCain 1966; From Cable Banquereau; USFC 1878)
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Peramphithoe humeralis, a large adult female about 3 cm long + antennae. Found in late October under a stone at extreme low tide (-3) at Sares Head. This female is carrying babies between her oostegites. Two babies can be seen peeking out from below her body behind leg 5 (angled forward) and in front of leg 6 (angled backward). (Photo by: Dave Cowles, October 2007) Identified with the help of Craig Staude
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Aeginella spinosa Head and Gnathopods Head and Gnathopods of Aeginella spinosa specimens (National Museum of Natural History, Washington DC: (NMNH) 34786; Id J. McCain 1966; From Cable Banquereau; USFC 1878)
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Mayerella banksia (Laubitz, 1970) Common name: Skeleton Shrimp Mayerella banksia collected at Rosario Bay among drift algae. Photo by: Christina Smith, June2002
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Aeginella spinosaDorsal spination of Aeginella spinosa specimens (National Museum of Natural History, Washington DC: (NMNH) 34786; Id J. McCain 1966; From Cable Banquereau; USFC 1878)
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This closeup shows pereonites 5-7 with their appendages, pereopods 5-7. Pereopods 5-7 arise from the posterior end of their segment (pereonite) and are used for gripping the substrate such as this eelgrass blade. The left pereopod 7 is missing.
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Aeginella spinosa Pereopods VIIPereopods VII of Aeginella spinosa specimens (National Museum of Natural History, Washington DC: (NMNH) 34786; Id J. McCain 1966; From Cable Banquereau; USFC 1878)
