Gravid segments of common tapeworms found parasitizing the intestinal tracts of dogs and cats; From top to bottom: Spirometra mansonoides (top), Taenia sp., Mesocestoides sp., and Dipylidium caninum (bottom); Stack of 12 exposures (© Lance Wheeler, 2018 | Photographer: Lance Wheeler | Owner of Specimens: Texas A&M College of Veterinary Medicine, Department of Veterinary Pathobiology)

Mesocestoides sp. (tetrathyridium)

Mesocestoides sp. (adult tapeworm)

Spirometra mansonoides, Taenia sp., Mesocestoides sp., and Dipylidium caninum tapeworms

Spirometra mansonoides, Taenia sp., Mesocestoides sp., and Dipylidium caninum tapeworms

Mesocestoides sp. tapeworm segment

Mesocestoides sp. tapeworm segment

Mesocestoides sp. proglottids

Mesocestoides sp. immature proglottids

Mesocestoides sp. immature proglottids

Mesocestoides sp. mature proglottids

Mesocestoides sp. gravid proglottid

Eggs within the central parauterine organ of a Mesocestoides sp. gravid proglottid

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments

Mesocestoides sp. tapeworm segments