Description
Feeding trophont may be large; tomite has < 2 2 right-spiralled kineties ; symbionts (parasites?) on marine crustacea , e.g ., hermit crabs, shrimp , copepods; oral structures as rosette and three polykinetids (i.e., x , y, and z kineties) ; 17 genera. b 9 <9 e? 1. Tomite has 16 kineties; ogival field, t r i- anguloid ; phoronts on copepod /dya furcata ; trophonts produce tomites when host eaten by coelenterate Cladonema radiatum ..Spirophrya 1'. Tomite has nine kineties ....... ...... ... ........... .. ....... 2 2. Ogival field absent. ...... ........ .. ... .... Phtorophrya 2' . Ogival field present. .. .... ..... ............... ........ ......... 3 3. Oral kineties x, y , z shorter than length of o g i- val field ; in/on Nebalia exuviaePhoretophrya 3' . Oral kineties x, y, z as long as ogival field .. .. ... .4 4. Scattered clumps of kinetosomes on anterior ventral field of trophont ... ..... ..... ... Hyalophysa 4' . Anterior ventral field lacks kinetosomes ...... .... .. . .... .. ...... ... ..... .. .................... ...... Gymnodinioides e trophotomont. B. Ventral surface of tomite . (from de Puytorac and Grain , 1975) tomite . B. Trophont. (from Chatton and Lwoff, 1935)
Type species
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Raw text
Feeding trophont may be large; tomite has < 2 2 right-spiralled kineties ; symbionts (parasites?) on marine crustacea , e.g ., hermit crabs, shrimp , copepods; oral structures as rosette and three polykinetids (i.e., x , y, and z kineties) ; 17 genera. b 9 <9 e? 1. Tomite has 16 kineties; ogival field, t r i- anguloid ; phoronts on copepod /dya furcata ; trophonts produce tomites when host eaten by coelenterate Cladonema radiatum ..Spirophrya 1'. Tomite has nine kineties ....... ...... ... ........... .. ....... 2 2. Ogival field absent. ...... ........ .. ... .... Phtorophrya 2' . Ogival field present. .. .... ..... ............... ........ ......... 3 3. Oral kineties x, y , z shorter than length of o g i- val field ; in/on Nebalia exuviaePhoretophrya 3' . Oral kineties x, y, z as long as ogival field .. .. ... .4 4. Scattered clumps of kinetosomes on anterior ventral field of trophont ... ..... ..... ... Hyalophysa 4' . Anterior ventral field lacks kinetosomes ...... .... .. . .... .. ...... ... ..... .. .................... ...... Gymnodinioides e trophotomont. B. Ventral surface of tomite . (from de Puytorac and Grain , 1975) tomite . B. Trophont. (from Chatton and Lwoff, 1935)