Biarmifer nesiotes

Biarmifer nesiotes	Contents	Rev: 03/10/2026
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Biarmifer Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Cyatholaimidae Menu	Feeding	References
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Classification:

Chromadorea
Chromadoria
Chromadorida: Chromadorina
Chromadoroidea
Cyatholaimidae: Cyatholaiminae
Biarmifer nesiotes Cunha, Fonseca & Amaral, 2023

    Synonyms:

Morphology and Anatomy:

With characteristics of family Cyatholaimidae. Described from male specimens.

Body cylindrical, slightly narrower on the anterior extremity and tapering abruptly on the posterior end.
Cuticle heterogeneous, larger punctations between anterior sensilla and nerve ring surrounded by hexagonal outlines; transverse rows of smaller, punctations on rest of body; lateral differentiation of larger and more spaced punctations; lateral region withfewer rows of punctations than ventral and dorsal regions.
Longitudinal row of lateral pore-like (LP) structures along each mediolateral line between excretory pore and conical part of tail; LPs with a circular or elliptical opening supported by an unmodified punctation.
Pore complexes consisting of a cuticularized ring with a slit-like transversal aperture.
Three somatic setae located on each sublateral axis on the pharyngeal region, 5 to 14 um in length, at about 2.5 head diameter from the anterior end.
Two longitudinal rows of setae on the tail

Females:

Didelphic, amphidelphic. \
Vagina and vaginal glands heavily cuticularized
Vulva located slightly pre-median.

Ref: Cunha et al., 2023

Males:

Diorchic, testes opposed.
Spicules paired 83 um longwith prominences on the proximal end; fusiform in the distal half, dilated in the middle region, with a central groove, and pointed distal end
Gubernaculum proximally and distally paired (not fused), slightly shorter than the spicules,proximal end swollen and curved behind the spicules
Five weakly developed cup-shaped precloacal supplements present, the first 120 un before cloacal opening.
Tail conical-cylindrical with the conical portion about 45% of tail length

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

Life Cycle:

Ecophysiological Parameters:

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

Ecosystem Functions and Services:

Cunha, B.P., Fonseca, G., Amaral, A.C.Z. 2023. Two new species of Cyatholaimidae (Nematoda: Chromadorida) from the Southeastern Brazilian coast with emphasis on the pore complex and lateral pore-like structures. PeerJ 2023 Fev 20; 11:e14712 doi: 10.7717/peerj.14712