b.s agri nematode classification

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PHYLUM NEMATODA SECERNENTEA (PHASMIDIA) ADENOPHOREA (APHASMIDIA) CLASS

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Page 1: B.s agri  nematode classification

PHYLUM NEMATODA

SECERNENTEA(PHASMIDIA)

ADENOPHOREA(APHASMIDIA)

CLASS

Page 2: B.s agri  nematode classification

CLASS SECERNENTEA Excretory system with lateral canal Amphid aperture usually small pore like Phasmid present Caudal gland absent Somatic sensory organ usually absent

CLASS ADENOPHOREA Excretory system without lateral canal Amphid aperture usually well-developed Phasmid absent Caudal gland present Somatic sensory organ present

Page 3: B.s agri  nematode classification

• The entire classification of Phylum Nematoda is too extensive.

• It includes animal and insect parasites as well as marine, fresh-water and soil-inhabiting groups.

•All of them are included in eleven orders.

• But important are those groups which are related with plants and soil.

• The only order Tylenchida is a very large and diverse group of nematodes.

Page 4: B.s agri  nematode classification

CLASS SECERNENTEA TYLENCHIDA RHABDITIDA

STRONGYLIDA

ASCARIDIDA

SPIRURIDA

CAMALLANIDA

Page 5: B.s agri  nematode classification

CLASS ADENOPHOREA

DORYLAIMIDA

CHROMADORIDA

MONHYSTERIDA

ENOPLIDA

DICTOPHYMATIDA

Page 6: B.s agri  nematode classification

ORDER TYLENCHIDA

SUBORDERS

Tylenchina (Orley, 1880) Geraert, 1966Dorsal esophageal gland outlet located in

procorpus of oesophagus often near base of stylet.

Aphelenchina (Fuchs, 1937) Geraert, 1966Dorsal oesophageal gland outlet situated in

median bulb (metacorpus) of oesophagus.

Page 7: B.s agri  nematode classification

SUBORDER TYLENCHINA

SUPERFAMILIES

Atylenchoidea: Head with setae. Neotylenchoidea: Head without setae. Valvular median oesophageal bulb

absent. Criconematoidea: Valvular median oesophageal bulb present. Oesophagus

basically Criconematoid. Tylenchoidea: Oesophagus tylenchoid. Both sexes active, vermiform

nematodes, ectoparasites or migratory parasites, bursa present, often large. Heterodiroidea: Oesophagus tylenchoid. Females inactive, swollen,

sessile, attached to or within plant roots, with pronounced sexual dimorphism; eggs may be retained in body or often deposited in gelatinous matrix, males vermiform with small bursa or more often without.

Page 8: B.s agri  nematode classification

ATYLENCHOIDEA

Atetylenchus spp.

Head with setae

Page 9: B.s agri  nematode classification

NEOTYLENCHOIDEA

Neotylenchus spp. and other genera

Head without setae.

Valvular median oesophageal bulb absent

Page 10: B.s agri  nematode classification

CRICONEMATOIDEA

Hemicriconemoides spp. Criconema spp.

Valvular median Oesophageal bulb present

Oesophagus basically criconematoid

Page 11: B.s agri  nematode classification

CRICONEMATOIDEA

Criconemella spp.

Valvular median oesophageal bulb present

Oesophagus basically criconematoid

Page 12: B.s agri  nematode classification

TYLENCHOIDEA

Hoplolaimus spp.

Oesophagus tylenchoid Both sexes active, vermiform

Ectoparasites or migratory parasitesBursa present, often large

Page 13: B.s agri  nematode classification

HETERODIROIDEA

Root-knot nematode (Meloidogyne spp.)

Oesophagus tylenchoidFemales inactive, swollen,

sessile, attached to or within plant roots, with pronounced sexual dimorphism

Eggs may be retained in body or often deposited in gelatinous matrix

Males vermiform with small bursa or more often without

Page 14: B.s agri  nematode classification

HETERODIROIDEA

Cyst Nematode (Heterodera spp.)

Page 15: B.s agri  nematode classification

SUPERFAMILY TYLENCHOIDEA

FAMILIES

Tylenchidae Dolichodoridae Tylenchorhynchidae Pratylenchidae Hoplolaimidae Belonolaimidae

Page 16: B.s agri  nematode classification

Tylenchidae

Oesophageal glands enclosed in a basal bulb.

Head without or with light-to-moderate sclerotization

Stylet weakly to moderately developed

Ovaries 1 or 2 Valva in posterior part of

body Bursa adanal Females tails filiform,

clavate, or elongate conoid.

Tylenchus spp.

Page 17: B.s agri  nematode classification

Dolichodoridae

Oesophageal glands enclosed in a basal bulb

Head with massive sclerotization

Stylet long and well developed

Ovaries 2, bursa large, terminal trilobed

Dolichodorus spp.

Page 18: B.s agri  nematode classification

Tylenchorhynchidae

Oesophageal glands enclosed in a basal bulb. Head without or with light-to- moderate sclerotization Stylet weakly to moderately developed Ovaries 1 or 2, Vulva always median Bursa adanal or enveloping tail but

not trilobed Female tail cylindrical, conoid, with

rounded swollen, or acute terminus

Tylenchorhynchus spp.

Page 19: B.s agri  nematode classification

Pratylenchidae Oesophgeal glands over

lapping anterior end of intestime

Female head low, broad at its base rounded or flattened anteriorly

Pratylenchus spp.

Page 20: B.s agri  nematode classification

Hoplolaimidae

Oesophgeal glands lobbed over lapping anterior end of intestine.

Female head high or elevated.

Female tail not more than 2 anal body width in length

Phasmids small, pore like or large (scutellae) and variable in position.

Hoplolaimus spp.

Page 21: B.s agri  nematode classification

Belonolaimidae

Oesophgeal glands lobbed over lapping anterior end of intestine.

Female head high or elevated.

Female tail at least 2 anal body width in length

Plasmids always small pore like and located on tail.

Page 22: B.s agri  nematode classification

FAMILY TYLENCHIDAE

SUB-FAMILY

• Dactylotylenchinae: Dactylotylenchus• Tylodorinae: Tylodorus• Psilenchinae: Psilenchus• Schynotylenchinae: Schynotylenchus• Anguininae: Anguina• Tylenchinae: Tylenchus• Ditylenchinae: Ditylenchus

GENUS

Page 23: B.s agri  nematode classification

FAMILY TYLENCHORHYNCHIDAE

SUB-FAMILY GENUS

TYLENCHORHYNCHINAE: TYLENCHORHYNCHUS

TROPHURINAE: TROPHURUS

Page 24: B.s agri  nematode classification

FA MILY DOLICHODORIDAE

SUB-FAMILY GENUS

DOLICHODORINAE: DOLICHODORUS

Page 25: B.s agri  nematode classification

FAMILY BELONOLAIMIDAE

SUB-FAMILY GENUS

BELONOLAIMINAE: BELONOLAIMUSTELOTYLENCHINAE: TELOTYLENCHUS

Page 26: B.s agri  nematode classification

FAMILY PRATYLENCHIDAE

• SUB-FAMILY GENUS

• PRATYLENCHINAE: PRATYLENCHUS• RADOPHOLINAE: RADOPHOLUS

Page 27: B.s agri  nematode classification

FAMILY HOPLOLAIMIDAE

• SUB-FAMILY GENUS

• HOPLOLAIMINAE: HOPLOLAIMUS

ROTYLENCHINAE: : ROTYLENCHUS HELICOTYLENCHUS

• ROTYLENCHOIDINAE: ROTYLENCHOIDES• APHASMATYLENCHINAE: APHASMATYLENCHUS