Cellarinella incompta, Hayward & Winston, 2011

Hayward, Peter J. & Winston, Judith E., 2011, Bryozoa collected by the United States Antarctic Research Program: new taxa and new records, Journal of Natural History 45 (37 - 38), pp. 2259-2338 : 2296-2298

publication ID

https://doi.org/ 10.1080/00222933.2011.574922

persistent identifier

https://treatment.plazi.org/id/03F93214-965F-D214-FE46-FAD29128FD0D

treatment provided by

Felipe

scientific name

Cellarinella incompta
status

sp. nov.

Cellarinella incompta sp. nov.

( Figure 18A, B View Figure 18 )

Material

Holotype. NMNH 1154033 View Materials : SOSC 876 , station 114, 60 ◦ 30.1’ S, 46 ◦ 42.8’ W; a single damaged colony, 80 mm high, with horizontal spread 90 mm GoogleMaps . Paratype: VMNH 13665.00, same data as Holotype GoogleMaps .

Description

Colony erect, attached by an encrusting base, developed as a short, thick peduncle, 8 mm diameter, 10 mm high, above which it expands into a rigid, folded, bilaminar plate, 2 mm thick at growing edge, 3 mm just above peduncle; colony architecture incompletely known but evidently very irregular, the folded plate has a continuous, wavy growing edge, and shows growth bands, but at points of damage it displays short, narrow, regenerating lobes. Autozooids arranged in alternating longitudinal series; individual boundaries visible only at the growing edge, reticulate calcification originating around the single series of marginal pores in the frontal shield advances centripetally, and thickens within one or two ontogenetic generations from the growing edge, and the entire frontal surface of the colony is covered by a continuous reticulate layer. Secondary orifice wider than long, a frontally curving, medially convex lip within the proximal edge of the orifice imparts a slightly crescentic appearance in later ontogeny. Avicularia very sparse, and inconspicuous; cystid budded just proximal to rim of secondary orifice, but rostrum situated within it, broadly scaphoid in outline, hooked distally, slightly acute to frontal plane and directed proximo-laterally. No other type of avicularium noted. Ovicells not apparent.

Measurements

For all measurements, n = 20, mean ± SD: autozooid length (basal view) 2.21 ± 0.22 mm; autozooid width (basal view) 0.40 ± 0.04 mm; length secondary orifice 0.34 ± 0.03 mm; width secondary orifice 0.15 ± 0.01 mm.

Etymology

Latin, incomptus: unadorned, with reference to the simple morphology of the secondary orifice.

Remarks

Cellarinella incompta sp. nov resembles C. latilaminata Moyano, 1974 View in CoL , the only other species of the genus known to develop a colony form of folded bilaminar plates. It differs from that species in having much large zooids than C. latilaminata View in CoL (1.4–1.8 by 0.5 mm), in its sparse avicularia, lodged within the secondary orifice, and in the simple structure of the secondary orifice. The large avicularia of C. latilaminata View in CoL occur on the frontal surfaces of the autozooids, proximal to the secondary orifice, which incorporates a conspicuous distal oral shelf, missing in C. incompta sp. nov., and typically has a pronounced umbo on its proximal edge. Cellarinella latilaminata View in CoL was originally described, and later reported again, from the South Orkneys, and was listed from the Ross Sea by Hayward and Taylor (1984); C. incompta sp. nov was collected from the vicinity of the South Orkney Islands.

VMNH

Virginia Museum of Natural History

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Sclerodomidae

Genus

Cellarinella

Loc

Cellarinella incompta

Hayward, Peter J. & Winston, Judith E. 2011
2011
Loc

Cellarinella incompta

Hayward & Winston 2011
2011
Loc

C. incompta

Hayward & Winston 2011
2011
Loc

C. incompta

Hayward & Winston 2011
2011
Loc

C. latilaminata

Moyano 1974
1974
Loc

C. latilaminata

Moyano 1974
1974
Loc

C. latilaminata

Moyano 1974
1974
Loc

Cellarinella latilaminata

Moyano 1974
1974
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