Rhynchonema cemae

Rhynchonema cemae	Contents	Rev: 03/26/2022
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Rhynchonema Menu	Economic Importance	Ecosystem Functions and Services
	Distribution	Management
Return to Xyalidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Chromadoria
Monhysterida: Monhysterina
Sphaerolaimoidea
Xyalidae
Rhynchonema cemae Bezerra, Smol & Vincx, 2014

Synonyms:

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Morphology and Anatomy:

Body elongated, slender, sharply tapers anteriorly to the amphids.
Cuticle annulated from the end of the cheilostome until the beginning of the spinneret.
Edge of the annuli forwardly projected on the anterior half of the body and backwardly on the posterior half; Inversion point of the annuli at 57.4 % of the body.
Very thin somatic setae about 10 um long, distributed along the body.
Six, very thin, cephalic setae (2um), about 0.5 head diameter
Amphids circular (diameter 4.8 um) at the base of the pharyngostome, 40 um from the anterior ., occupying 55.2 % of the corresponding body diameter.
Stoma about 42.5 um, unarmed and consisting of a short cheilostome and a tubular pharyngostome.
Pharynx cylindrical, slightly expanded in the posterior region.
Small cardia protrudes into the intestine.
Tail conical, ventrally curved. Three caudal glands present opening in a terminal spinneret.

Ref: Bezerra et al., 2014.

	Females: Reproductive system monodelphic-prodelphic, with ovary outstretched lying on left side of the intestine. Spermatozoa frequently found in the spermatheca. Perivulvar gland cells are present. Ovejetor sclerotized. Vulva without operculum or particular sclerotization.

Males: Diorchic, outstretched testes directed anteriorl Spicules slender, arched awith same shape and similar same size . Both spicules are slender and with uniform sclerotization from the proximal to the distal region.; ssmall capitulum Distal end of the spicules surrounded by the gubernaculum, which has a dorsal sclerotized projection.
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

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Distribution:

Marine nematodes described from medium grain size sand in intertidal zone of exposed sandy beach, Olindaï¿½s Isthmus,
Pernambuco, Brazil.

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Economic Importance:

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Feeding:

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Biology and Ecology:

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Life Cycle:

Spermatazoa in spermatheca and frequency of males suggests sexual reproduction.

Ecophysiological Parameters:

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

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Ecosystem Functions and Services:

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Management:

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References:

Bezerra, T.N. Smol, N. , Vincx, M. 2014. Two new species of Rhynchonema Cobb, 1920 from a Brazilian sandy beach. Mar Biodiv DOI 10.1007/s12526-014-0223-6

Rhynchonema cemae

Copyright © 1999 by Howard Ferris. Revised: March 26, 2022.

Copyright © 1999 by Howard Ferris.
Revised: March 26, 2022.