Laimaphelenchus spiflatus

Contents

Rev 13-07-2021

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• Body slender, slightly ventrally arcuate
• Cuticle with fine annulations. Lateral field with four incisures.
• Lip region with five or six annuli and six similar labial sectors offset, more than twice as broad as high.
• Oral aperture surrounded by six inner labial papillae and four cephalic papillae. Outer labial papillae vestigial.
• Amphidial apertures oval, on edges of labial plate.
•  Stylet fine, conus occupying ca 40% of its total length, knobs small.
• Procorpus cylindrical, metacorpus well developed, oval to spherical, with slightly anteriorly situated valves.
• Dorsal pharyngeal gland orifice (DPGO) opening into lumen of metacorpus
• Pharyngo-intestinal junction located half a metacorpal valve length posterior to base of metacorpus.
•  Nerve ring ca one body diam. posterior to metacorpus.
• Pharyngeal gland lobe a slender dorsl overlap of intestine.
•  Excretory pore slightly posterior to nerve ring.

Female:

• Monodelphic, prodelphic with ovary, oviduct, spermatheca, crustaformeria, uterus, vagina + vulva and long post-vulval uterine sac (PUS).
• Ovary single, outstretched, developing oocytes arranged in 1-2 rows, several well-developed oocytes arranged in a single row.
• Oviduct short and connected to an ovoid to oblonged spermatheca, filled with sperm cells.
• Vagina slightly inclined anteriorly, with massive sclerotisation.
• Vulva a traverse slit, anterior vulval lip modified into a long vulval flap covering the posterior vulval lip.
•  Anus distinct, its lips slightly elevated.
• Tail conoid, slightly ventrally curved with a stalk ending in 8-12 finger-like projections.(seen clearly under SEM).eneral morphology similar to male.

Male:

• Body slender, J-shaped when heat-killed.
• Cuticle and anterior body region similar to those of female.
• Monorchis, testis located on left side of intestine, outstretched, developing spermatocytes in a single column.
• Anterior partof testis containing developing spermatocytes in a single row, gradually developing into two rows.
• Posterior part of gonad forming vas deferens, containing several well developed sperm,
• Cloacal lips not protruding.
• Spicules paired, condylus small, triangular to rounded, rostrum very short with a bluntly rounded tip, capitulum straight, lamina/calomus complex smoothly ventrally curved to distal end. Distal end of spicules truncate, cucullus absent.
• Two pairs of subventral papillae present, first precloacal papillae subventral, located slightly anterior to cloacal opening, second postcloacal subventral papillae at middle of tail.
• Tail conoid, ventrally curved, terminus similar to that of female.
• Bursa absent

Ref: Gu et al., 2020

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