• Body length 2.1-3.6 mm

• Outer labial  and cephalic setae in separate circles; four subcephalic setae and adjacent to, amphids.

• Lip region with two almost equal lobes flanking transverse mouth opening; dorsal lobe formed by enlarged dorsal lip pair and ventral lobe formed by fusion of two ventrosublateral lip pairs.

• Amphideal fovea 0.43–0.60 cbd.

• Buccal cavity with two small ventrosublateral teeth and large dorsal tooth with two lateral pointed projections (dorsosublateral teeth). Smaller ventral tooth present.

Paramicrolaimus hohonucola. A, female anterior body. B, male anterior body. C, female cephalic region. D, male cephalic region. E, male copulatory system. F, male posterior body. G, female posterior body. Scale bar: A, B = 44 um; C, D = 20 um; E = 14 um; F, G = 31 um Drawings from Leduc et al. (2017)

Male:

•  Brownish cylindrical body, strongly pigmented between amphids and nerve ring, and in caudal region,
• Cuticle striated from level of anterior edge of amphids to spinneret.
• Sparse and irregular somatic setae mainly in pharyngeal and tail region,
• Amphideal fovea spiral with 1.25 turns; amphideal aperture oval-shaped and smaller than amphideal fovea.
• Buccal cavity asymmetrical, with cuticularized walls; single large dorsal tooth present, heavily cuticularized and with two lateral pointed projections (dorsosublateral teeth), set within pharyngeal tissue and protruding only slightly into buccal cavity.
• Dorsal gland opening into pharyngeal lumen through distal extremity of tooth.
• Pharynx cylindrical and muscular, with slightly swollen anterior end surrounding buccal cavity and weak, elongated posterior bulb. Nerve ring at approximately mid-length of pharynx. Conoid and muscular cardia present,  surrounded by intestine.
• Secretory-excretory system present; excretory ampulla and pore situated ventrally, slightly posterior to nerve ring, renette cell located ventrally, at level or immediately posterior to cardia,
• Reproductive system diorchic, testes outstretched.
•  Spicules paired, equal, arcuate, 1.8–2.1 cbd long, with a central cuticularized projection (lamella) at proximal end. Velum and capitulum present.
•  Gland-like brown granules present beneath each supplement.
• Tail short, conical, bent ventrally, with irregularly spaced setae, row of seven ventral setae, and circle of four longer subterminal setae.
• Three caudal glands and spinneret present

Female:

• Body wider than males.
•  Short somatic setae sparser than in males, apparently absent in some specimens.
• Tail with only one subterminal dorsal seta.
• Didelphic, ovaries reflexed.
• Spermatheca not observed.
• Vulva located at 42-48% of body length
•  Short, conical tail with terminal spinneret,
• Tail 3.9-5.3 abd long with only one subterminal, dorsal seta

Ref  Leduc et al., 2017