Conescharellina biarmata ( Maplestone, 1909 )

Bock, Philip E. & Cook, Patricia L., 2004, A review of Australian Conescharellinidae (Bryozoa: Cheilostomata), Memoirs of Museum Victoria 61 (2), pp. 135-182 : 148

publication ID

https://doi.org/ 10.24199/j.mmv.2004.61.11

persistent identifier

https://treatment.plazi.org/id/03C18788-1001-FFEE-64B4-4BFDFD58FAA8

treatment provided by

Felipe

scientific name

Conescharellina biarmata ( Maplestone, 1909 )
status

 

Conescharellina biarmata ( Maplestone, 1909) View in CoL .

Figures 2A, B View Figure 2

Bipora biarmata Maplestone, 1909: 268 , pl. 75 figs 1a, b. Conescharellina biarmata View in CoL .— Harmer, 1957: 729.

Specimens examined. BMNH 2000.2 .23.2, (4 colonies, part of material sent by Maplestone to BMNH, labelled “cotypes”) ; NMV F98980 About NMV , no locality (89 colonies, labelled by Maplestone, probably part of type material) ; NMV F101880 About NMV , South Australia, (9 colonies, from Maplestone, with “S.A.” on box) ; NMV F101881 About NMV , stn SLOPE-19 (2 colonies) ; NMV F101882 About NMV , stn BSS-170 (1 colony) ; NMV F101883 About NMV , no locality, slide labelled E3195, suspected material from “Endeavour” (New South Wales) but no other information (2 colonies) .

Description. Colonies very small, conical, distinctly higher than wide. Calcification smooth. Orifices in radial series, patent, with little raised peristome, elongated oval, with a very small sinus formed by paired condyles. Frontal septular pores slit-like. Adapical pore placed just outside the edge of the peristome. Avicularia regularly paired, proximolateral to the orificial sinus, small, elongated, narrow, triangular, with a ligulate bar, orientated laterally and slightly antapically. Lunate root pores adapical, uncommon. Antapical surface with small avicularia in mature specimens, adapical surface solid with kenozooidal calcification and scattered avicularia.

Specimens 2.0– 2.3 mm high, 1.4–1.6 mm wide, and comprise approximately 10–13 astogenetic generations arranged in radial rows. The number of zooids in each whorl, 6–8.

Remarks. Livingstone (1924) placed C. biarmata in the synonymy of C. angulopora . Maplestone’s material differs from Livingstone’s concept of this species in the consistently small colonies, and the characters of orifices and avicularian orientation. Harmer (1957) did not describe C. biarmata but treated it as a distinct species. Maplestone’s specimens are numerous and very consistent in characters that are shared by the specimens from stn SLOPE-19 and the slide E3195. Other specimens with elongated, triangular, paired avicularia from the SLOPE stations differ in several respects and are here described as Conescharellina ecstasis (see below).

NMV

Museum Victoria

Kingdom

Animalia

Phylum

Bryozoa

Class

Gymnolaemata

Order

Cheilostomatida

Family

Conescharellinidae

Genus

Conescharellina

Loc

Conescharellina biarmata ( Maplestone, 1909 )

Bock, Philip E. & Cook, Patricia L. 2004
2004
Loc

Bipora biarmata

Harmer, S. F. 1957: 729
Maplestone, C. M. 1909: 268
1909
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