| 单词 | ramshorn snail |
| 释义 | > as lemmasramshorn snail a. Now usually in form ramshorn. Any of various herbivorous aquatic snails with flat spiral shells that constitute the family Planorbidae. Also ramshorn snail. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > order Pulmonifera > Inoperculata > family Limnaeidae or Planorbidae > member of water snail1548 ramshorn snail1778 physa1834 mud snail1890 trumpet-snail1901 1778 E. M. da Costa Brit. Conchol. 60 Fluviatiles... Cornu Arietis. Ram's Horn... The shell is rather thin and brittle, glossy, and measures from three quarters of an inch to an inch and a quarter or a half in diameter. 1800 E. Donovan Nat. Hist. Brit. Shells II. Pl. XXXIX Helix cornea. Ram's horn. 1901 E. Step Shell Life xvii. 319 The next section of these Pond-snails comprises the Flat-coils (Planorbis), made familiar by the typical species—the Ram's-horn or Trumpet-snail. 1926 A. E. Ellis Brit. Snails ii. 118 The snails of this family are popularly called Ram's-horns, Flat-coils, or Trumpet Snails. 1960 Times 4 Aug. 1/3 (advt.) Pond Naturalist would gratefully acknowledge information where to collect Ramshorn Snails. 2002 Water Gardener July 9 The presence of empty giant pond and ramshorn snail shells usually indicate that leeches are present. < as lemmas |
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