Exercise 3: Superfamily Paramphistomoidea (Amphistomes)

thick

fleshy

the amphistomes, in general, are _____ and _____ flukes

sucker at each extremity

small oral

large ventral (acetabulum) suckers

large pharynx

the amphistomes are characterized by the presence of _______, ______ and _____, and a _____

Family Gastrothylacidae

Family Paramphistomidae

Family Gastrodiscidae

most amphistomes of terrestrial vertebrates belong to the following families (3)

with a ventral pouch

body not divided into 2 parts

Family Gastrothylacidae characteristics (2)

Fischoederius

Carmyerius

Gastrothylax

Velasquezotrema

genus under Family Gastrothylacidae (4)

rumen

cattle

posterior part of the body

midline of the body

Fischoederius

• members of this genus occur in the _____ of _____ and other bovines

• testes - lie tandem in the _____

• uterus - runs forward in the _____

Fischoederius elongatus

Fischoederius cobboldi

species under the genus Fischoederius (2)

cattle

water buffaloes

Fishchoederius elongatus

• most common species of amphistomes affecting ______ and _____ in the Philippines

simple

middle of the body

Fischoederius elongatus

• ceca - _____ and end about the _____

Gyraulus convexiusculus

freshwater snail

intermediate host of Fischoederius elongatus in the Philippines

pulmonate gastropod under the Family Planorbidae

rumen

cattle

Fishchoederius cobboldi

• occurs in the _____ of ______

• second most common amphistome species affecting bovines in this country

wavy

posterior end of the body

Fishchoederius cobboldi

• ceca - _____ and terminate near the _____

Fischoederius philippinensis

Fischoederius upiensis

Fischoederius emiljavieri

other species of Fischoederius in the Philippines occurring in domestic ruminants (3)

posterior part of the body

horizontally

middle

Carmyerius

• testes - located in the ______ lying _____

• uterus - runs forward in the _____

Carmyerius synethes

in rumen of ruminants

only species under the genus Carmyerius

horizontally

posterior part of the body

crosses

anterior end

Gasthrothylax

• testes - _____ arranged in the _____

• uterus - _____ the middle from one side to another as it runs forward to the _____

Gastrothylax crumenifer

occurs in the rumen of ruminants

only species under the genus Gastrothylax

Velasquezotrema

smaller in size than the preceding genera

middle half of the body

Velasquezotrema

• ventral pouch - extends only to the _____

Velasquezotrema brevisaccus

occurs in the rumen of water buffaloes

only species under the genus Velasquezotrema

without a ventral pouch

body not divided into two parts

Family Paramphistomidae characteristics (2)

Calicophoron calicophorum

Gigantocotyle formosanum

Explanatum

Orthocoelium (=Ceylonocotyle)

Cotylophoron

genus and species under the Family Paramphistomidae (5)

Calicophoron calicophorum

occurs in the rumen and reticulum of ruminants

Gigantocotyle formosanum

occurs in the abomasum and rumen

very large acetabulum

Gigantocotyle bathycotyle

occurs in the liver of cattle and water buffaloes

enormous acetabulum

bile ducts

liver

ruminants

Explanatum

• has an _____

• occur in the _____ and ______ of ______

Explanatum explanatum

Explanatum bathycotyle

Explanatum anisocotylea

species under the genus Explanatum (3)

Orthocoelium (=Ceylonocotyle)

Laurel’s canal

smaller in size than species of the preceding genera

_____ does not cross the excretory bladder

Orthocoelium orthocoelium

Orthocoelium dicranocoelium

Orthocoelium scoliocoelium

Orthocoelium gigantopharynx

Orthocoelium dinniki

Orthocoelium serpenticaecum

species under the genus Orthocoelium that occurs in the Philippines (6)

Cotylophoron

characterized by the presence of a genital sucker

Cotylophoron bareilliense

has been reported to occur in the Philippines

no ventral pouch

body is divided into two parts

Family Gastrodiscidae characteristics (2)

Gastrodiscus aegyptiacus

Homalogaster paloniae

species under the Family Gastrodiscidae (2)

Gastrodiscus aegyptiacus

occurs in the large and small intestines of horses and occasionally pigs

conical anterior region

saucer-shaped appearance

lateral margins

Gastrodiscus aegyptiacus

• note the ______ and the _____ of the rest of the body, in which the _____ curve inwards

Homalogaster paloniae

occurs in the large intestine of cattle