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Class - Secernentea
(Parasitic Roundworms)
![2.jpg](https://static.wixstatic.com/media/e6f22d_62bc6a036c86429fbf05e36a76e8a4c3~mv2.jpg/v1/fill/w_317,h_309,al_c,lg_1,q_80,enc_auto/2.jpg)
Characteristics of Secernentea are:
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Excretory system is tubular
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Cuticle is striated in two to four layers; lateral field is present
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Three esophageal glands; esophageal structure varies
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Males generally have one testis
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Caudal alae are common
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Sensory papillae are cephalic only; may be caudal papillae in males
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Mostly terrestrial
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