Nematology 100

Lecture 2 Slides

Labial Configurations - Criconematidae

after Bert, 2012

cephalic framework

cone

shaft

knobs

procorpus

metacorpus

valvenerve ring

lateral field

esophago-intestinal junction

intestine

esophageal glands

dorsal esophageal gland orifice

esophageal lumen

isthmus

hemizonid

excretory poreexcretory

canal

head

Anterior Region - Tylenchoidea

After Brzeski, 1998 Bert, 2012

amphidial canal

nerveprocesses

esophageal gland opening

esophageal lumen

nerveprocesses

stylet protractormuscle

stylet

somatic muscles

cephalic framework

stoma

amphid aperture

after Endo, 1980

Anterior Region - Tylenchoidea

Anterior Region – Tylenchoidea Tylenchidae

Esophageal Configuration

Enoplea Chromadorea

cardia

medianbulb

isthmus

intestine

odontostylestoma

setae

teethstylet

procorpus

postcorpus

procorpus

Teeth – immovable and moveable

EnopleaChromadorea

cone

shaft

knobs

stylet

Enoplea

Enoplia Dorylaimia

Enoplida Triplonchida Dorylaimida Mononchida

Belbolla sp.

Mermithida

Trichinellida

Mermis sp.Trichuris sp.

Chromadorea

Chromadoria

ChromadoridaDesmodorida

Monhysterida Rhabditida

spermatheca uteruspostvulval uterine sac

columellaovary

germinal zone

oocytes

oviduct

Female Reproductive System-monovarial, prodelphic example

after Bert, 2012

Male Reproductive System-monorchic example

testis

seminal vesicle

ejaculatory duct

vas deferens

spicule

gubernaculumcloaca

hypotygma

bursa

phasmid

From Holovachov and Boström, 2010

Nematode Sensilla – basic structures

after Bert, 2012

a.d. = amphidial ductcu. = cuticleep. = epidermisfov. = foveag.c. = gland cellm.d. = multivillous dendrites.c. = socket cells.r. = sheath receptor

Amphids – anterior chemosensory sensillae

after Bert, 2012; Coomans, 1979

Phasmids – posterior chemosensory sensillae

lateral field (4 incisures)

anus

rectumintestine

phasmid

after Bert, 2012

scutellum

spicule

gubernaculumcloaca

hypotygma

bursa

phasmid

Male tail region

lateral field (4 incisures)

anus

rectumintestine

phasmid

Female tail region

Deirids – minute lateral sensillae

after Bert, 2012