Overview

Distribution

Biogeography

Palaearctis

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

North Sea, Belgium

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Physical Description

Morphology

Body elongate, stout, fusiform in dorsal view, ventrally bent in lateral view; broadly oval in cross-section, higher than wide, greatest diameter near mid-length, fairly hyaline. Head and neck region narrower than trunk; head offset by dorsal transverse fold, occasionally with dorsal transverse fold anteriorly; neck offset from trunk by shallow, dorsal transverse fold. Trunk arched dorsally, more or less abruptly narrowing posteriorly; tail distinct, rounded posteriorly. Foot moderately short, c. 1/5 total length, two pseudosegments of equallellgth. Toes straight, more or less lanceolate in lateral view, abruptly ending in tubular points; in dorsal view with straight inner margins and curved outer margins; inner margins with short indentation prior to tubules, tubules laterally outcurved prior to their free end. Corona ventral, an anterior row of close-set cilia (reduced ·circumapical band ?) and at some distance (reduced apical field?) from the latter six tansverse, pre-oral bands of close-set cilia; lateral ciliary tufts absent. Dorsal antenna unpaired, short. Mouth near posterior edge of corona. Retrocerebral organ with sac and a pair of subcerebral glands. Brain egg-shaped, surrounded by large retrocerebral sac, two ducts, sac and ducts granular. Eyespots absent? No distinct constriction between stomach and intestine. Gastric glands medium large, globular, slightly compressed laterally, short-stalked. Pedal glands large, elongated, extending into trunk, with reservoir in toes. Vitellarium rounded, 8 nuclei. Subitaneous egg elongate oval in dorsal view, ventrally flattened in lateral view; short-stalked; smooth.

Trophi modified malleate. Rami triangular, inner margins, smooth, three to four short projections prior to tip; basal apophyses asymmetric: right apophyse small, 3toothed, left large, triangular, 7-toothed. Fulcrum short, in ventral view rod-shaped, slightly expanded posteriorly; in lateral view with expanded, ventrally recurved, hook-shaped posterior end. Left and right uncus with one principal and 5-6 subsidiary teeth, principal teeth with single accessory toothlet; principal teeth slightly clubbed, others linear, a supplementary comb of sharp, delicate teeth underneath tips of uncinal teeth. Manubria long, slender, strongly incurved posteriorly, head with short lateral cavities, anterior broadest . Two small, club-shaped epipharyngeal elements.

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Size

Length 270-320 µm; height 74-88 µm; width 65-70 µm; toe 32-36 µm

Subitaneous egg (LxWxH): 114-122x45-55x45-51 µm.

Trophi: ramus 12-14 µm; fulcrum 6-7 µm; uncus 12-15 µm; manubrium 16-20 µm

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Type Information

Collection specimen

Non-type voucher specimen for Proales christinae De Smet, 1994
Catalog number: RIR0074-IG28040
Collection: Royal Belgian Institute of Natural Sciences, Brussels, Belgium
Prepared by: De Smet, W H
Sex/stage/structure: subitaneous egg
Preparation: Slide Preparation; Microscope slide, pure Glycerine mount, paraffin sealing
Specimen Count: 1

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Collection specimen

paratypes for Proales christinae De Smet, 1994
Catalog number: RIR0073-IG28040
Collection: Royal Belgian Institute of Natural Sciences, Brussels, Belgium
Prepared by: De Smet, W H
Sex/stage/structure: females
Preparation: Slide Preparation; Microscope slide, pure Glycerine mount, paraffin sealing
Specimen Count: 5

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Collection specimen

holotype for Proales christinae De Smet, 1994
Catalog number: RIR0072-IG28040
Collection: Royal Belgian Institute of Natural Sciences, Brussels, Belgium
Prepared by: De Smet, W H
Sex/stage/structure: female
Preparation: Slide Preparation; Microscope slide, pure Glycerine mount, paraffin sealing
Specimen Count: 1

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Ecology

Habitat

Among hydroids washed ashore on the beach

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!