R

r-strategy, 2:27

Radial cleavage, 2:3, 2:19-20

See also Reproduction Radial symmetry, 2:35

See also Physical characteristics Ragworms, 2:49, 2:51, 2:53-54 Raillietiella spp., 2:317

Ramshorn snails, 2:412

Ranina ranina. See Spanner crabs

Rathousiidae, 2:411, 2:413

Recruitment, 2:27

Red abalone, 2:432, 2:433

Red algae, 2:9

Red crayfish. See Red swamp crayfish

Red frog crabs. See Spanner crabs

Red rock crabs, 2:34

Red swamp crayfish, 2:203, 2:204-205

Red tide, 2:12

Red volutes, 2:445, 2:446

Reef bugs. See Flathead locust lobsters

Rehbachiella spp., 2:135

Rehbachiella kinnekullensis, 2:135

Reighardia spp., 2:317, 2:319

Reighardia sternae, 2:319

Reighardiidae. See Reighardia spp.

Religion, protostomes in, 2:42

See also Humans Rembrandt, 2:447 Remipedes, 2:125-129 Reproduction, 2:14-24, 2:27 amphionids, 2:196 amphipods, 2:261-262, 2:265-271 anaspidaceans, 2:182, 2:183 aplacophorans, 2:380, 2:382-385 Arachnida, 2:20, 2:23, 2:335, 2:339-352 articulate lampshells, 2:523, 2:525-527 bathynellaceans, 2:178, 2:179 beard worms, 2:86, 2:88 bivalves, 2:24, 2:453-454, 2:457-466 caenogastropods, 2:447, 2:449 centipedes, 2:355-356, 2:358-362 cephalocarids, 2:132, 2:133 Cephalopoda, 2:17, 2:478-479, 2:483-489 chitons, 2:395, 2:398-401 clam shrimps, 2:148, 2:150-151 copepods, 2:300, 2:304-310

cumaceans, 2:230, 2:232 Decapoda, 2:16, 2:17, 2:18, 2:201,

2:204-214 deep-sea limpets, 2:436, 2:437 earthworms, 2:22, 2:67, 2:70-73 echiurans, 2:16, 2:104, 2:106-107 fairy shrimps, 2:137, 2:139-140 fish lice, 2:290, 2:292-293 freshwater bryozoans, 2:497-498, 2:500-502 horseshoe crabs, 2:328, 2:331-332 Isopoda, 2:252, 2:254-260 krill, 2:187, 2:189-192 leeches, 2:16, 2:17, 2:77, 2:80-83 leptostracans, 2:162, 2:164-165 lophogastrids, 2:226, 2:227 mantis shrimps, 2:170-171, 2:173-175 marine bryozoans, 2:504, 2:506-508,

2:510-511, 2:513-514 mictaceans, 2:241, 2:242 millipedes, 2:23, 2:365, 2:367-370 monoplacophorans, 2:388, 2:390-391 mussel shrimps, 2:312, 2:314-315 mysids, 2:217, 2:219-222 mystacocarids, 2:295-296, 2:297 myzostomids, 2:60, 2:62 Neritopsina, 2:441, 2:442-443 nonarticulate lampshells, 2:516, 2:518-519 Onychophora, 2:17, 2:23, 2:110, 2:113-114 pauropods, 2:376, 2:377 peanut worms, 2:98, 2:100-101 phoronids, 2:492, 2:494 Polychaeta, 2:21-23, 2:47, 2:50-56 Pulmonata, 2:16, 2:414, 2:417-421 remipedes, 2:126, 2:128 sea slugs, 2:405, 2:407-410 sea spiders, 2:322, 2:324-325 spelaeogriphaceans, 2:243, 2:244 symphylans, 2:372, 2:373 tadpole shrimps, 2:142, 2:145-146 tanaids, 2:236, 2:238-239 tantulocaridans, 2:284, 2:286 Thecostraca, 2:275-276, 2:278-281 thermosbaenaceans, 2:246, 2:247 tongue worms, 2:320 true limpets, 2:424, 2:426-427 tusk shells, 2:470, 2:473-474 Vestimentifera, 2:92, 2:94-95 Vetigastropoda, 2:430, 2:433-434 water bears, 2:23, 2:117-118, 2:121-123 water fleas, 2:154, 2:157-158 Rhabdosoma brevicaudatum, 2:264, 2:265, 2:271 Rhabdouraea bentzi, 2:161 Rhabdus rectius, 2:470 Rhagoletis zephyria. See Tephritid flies Rhizocephala, 2:273, 2:274, 2:276 Rhizopoda, 2:12 Rhynchobdellida, 2:75 Rhytiodentalium kentuckyensis, 2:469 Rice tadpole shrimps. See Longtail tadpole shrimps

Richtersius coronifer. See Giant yellow water bears

Ricinoides afzelii, 2:337, 2:344, 2:348 Ricinulei, 2:333 Ridgeia spp., 2:91 Ridgeia piscesae, 2:85, 2:91 Riftia spp., 2:91

Riftia pachyptila. See Hydrothermal vent worms

Rileyiella spp., 2:317, 2:318

River nerites, 2:442, 2:443 River pearl mussels. See European pearly mussels

River worms, 2:68, 2:69, 2:70, 2:71-72 Rock barnacles, 2:277, 2:280-281 Rock slaters, 2:250

Rocky Mountain spotted fever ticks. See

Rocky Mountain wood ticks Rocky Mountain wood ticks, 2:337,

2:340-341 Roman snails, 2:416, 2:419, 2:420 Root-like barnacles, 2:33, 2:277, 2:278,

2:279-280 Ropalidia spp. See Wasps Rostroconchia, 2:469 Rosy wolfsnails, 2:416, 2:418, 2:420-421

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