Trichodorus marylandi

Trichodorus marylandi	Contents	Rev 08/31/2023
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Trichodorus Menu	Economic Importance	Damage
	Distribution	Management
Return to Trichodoridae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

      Enoplea
       Triplonchida
        Diphtherophorina
         Diphtherophoidea
          Trichodoridae
           Trichodorinae

Trichodorus marylandi Decraemer, Kantor, Handoo & Subbotin, 2022

Morphology and Anatomy:

Female:

Body largely straight or slightly ventrally curved, about 1 mm long.
Cuticle thin, not swollen when properly fixed.
Lip region rounded, with four slightly raised sets of double papillae composed of a cephalic papilla and a subdorsal or subventral papilla of the outer crown of labial papillae.
Amphidial fovea cup-shaped with amphidial aperture a large transverse slit located just posterior to lip region.
Stoma small, ventrally curved onchiostyle, with onchium about half the length.
Slender mid-part of pharynx usually slightly curved, gradually widening to a glandular bulb. P
haryngeal bulb with five gland nuclei; bulb offset from intestine or flanked by anterior dorsal intestinal overlap
Cardia weakly developed.
Nerve ring around isthmus.
Secretorty-excretory pore at level of pharyngeal isthmus.
Didelphic-amphidelphic with both genital branches about equally developed.
Spermatheca 12-45 um long and filled with small round to oval sperm.
Vagina barrel-shaped , about one third of corresponding body diam., with small, triangular sclerotised pieces.
Vulva pore-like
One postadvulvar body pore present on each side of body at 21 um from vulva and one body pore on each side of body about 4.5 vbd anterior to vulva.
Tail minute with anus subterminal and a pair of (sub)terminal caudal pores.

Male

A single ventromedian cervical papilla located anterior to secretory-excretory pore (S-E pore).
Lateral cervical pore (LP) on both sides located posterior to nerve ring
Monorchic; Sperm cells small, round, 5.0- 6.5 um in diam.,
Spicules curved ventrally, manubrium slightlywidened but hardly marked, spicule blade non-striated, slightly tapering to a minor indentation near level of posterior border of capsule of protractor muscles
Gubernaculum with keel-like posterior thickening.
Three protruding ventromedian precloacal supplements, protruberant in young males.
One pair of small postcloacal papillae close to cloacal opening and just posteriorly flanked by a pair of caudal pores.
Tail short, less than anal body diam. long, terminal cuticle not thickened.

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Ref: Decraemer et al., 2022

Distribution:

Reported from recorded from the rhizosphere of grasses in Maryland, USA.

Feeding:

Ectoparasitic; feeds on epidermal cells just behind root tips.

Hosts:

For an extensive host range list for this species, click

Life Cycle:

Based on presence of spwerm and abundant males, probabl;y sexually reproducing.

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Note that besides direct damage to plant roots by feeding at root tips, some species of trichodorids are important vectors of plant-pathogenic viruses. The virus-vecor capabil;ities of T. marylandi are currently unknown.

Back to Top

Management:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click

Back to Top

References:

Decraemer, W., Kantor, M.R., Handoo, Z.A., Subbotin, S.A. 2022. Description of Trichodorus marylandi n. sp. (Nematoda: Trichodoridae) from Maryland, USA. Nematology 24: 307-319.

Subbotin, S.A., Cid del Prado Vera, I., Inserra, R.N., Chizhov, V.N. & Decraemer, W. (2020). Molecular characterisation of some stubby root nematodes (Nematoda: Trichodoridae) from the USA and other countries. Nematology 22, 39-57. DOI: 10. 1163/15685411-00003279