Paracomesoma susannae

Contents

Rev: 03/07/2022

Females:

• General appearance similar to male.
•  Cuticle with irregular punctations and lateral differentiation.
• Buccal cavity small with three teeth atthe base.
• Multispiral amphideal fovea with two turns, close behind sub-cephalic setae (8 um from anterior body end).
• Inner and outer labial sensilla in form of setiform papillae.
• Cephalic sensilla very long (4 head diamd (hd)) located 0.5 hd from anterior body end.
•  Sub-cephalic setae (2 hd long) very close the cephalic setae, located 0.7 hd from anterior extremity.
• A ring of cervical setae 28 um long.
• Somatic setae numerous
• Pharynx gradually enlarging posteriorly into a bulb (25% of the PL).
• Nerve ring at 55% PL from anterior.
• Secretory – excretory pore at 63% of PL.
• Didelphic, amphidelphic with outstretched ovaries
• Sermatheca of each uterus branch containing oval sperm cells.
• Vulva at 52% of the body length. Vagina surrounded by constrictor muscles, granular vaginal glands present.
• Tail 251 um long, no terminal setae observed.

Ref Semprucci, 2015.

Males:  

• Body slender with a conical – cylindrical tail.

• Small, regular punctations on ventral and dorsal sides.

• Lateral fields with large dots in few transversal rows and irregularly arranged from the first third of the pharynx.

• Buccal cavity small, armed at the base with three teeth.

• Multispiral amphideal fovea with 2.5 turns, located closely behind the sub-cephalic setae.

• Inner and outer labial sensilla in form of setiform papillae. Cephalic sensilla very long (3.88 head diams long) located 0.52 hd from the anterior body end. Sub-cephalic setae (1.90 hd long) very close to cephalic sensilla'. A ring of cervical setae (26 um long) immediately behind the amphid. Somatic setae (about 0.28 cbd long) scattered and numerous.

• Pharynx cylindrical, anteriorly surrounding entire buccal cavity and posteriorly gradually enlarging to a bulb (26% of the pharynx length (PL)).

• Nerve ring at about 54% of the PL.

• Secretory –excretory pore jusanterior to pharyngeal bulb (64% of PL) with a prominent excretory cell just posterior to the bulb. Cardia cells not visible.

• Diorchic, testes opposite and outstretched with oviform spermatozoa.

• Spicules paired and elongate (118.5 um, 2.9 abd) with a cephalate capitulum.

• Tubular gubernaculum almost one-third of the spicule length (46.6 um) with hook-like structure in the distal part.

• Numerous ejaculatory lateral glands situated anteriorly to cloaca, 8 left, 10 right. 19-22 minute pre-cloacal supplements.

• Tails conical –cylindrical, 275 um long, without an evident spinneret; a single terminal seta, 11.1 um long

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