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Ehrenbergia Li, 1995 Ehrenbergia Li, 1995: 335. TYPE SPECIES. — Ehrenbergia baijingensis Li, 1995 (Li 1995: 335, pl. 1, fig. 10). AGE AND LOCATION OF TYPE MATERIAL. — Middle Ordovician: Darriwilian, the Baijingsi area in Qinghai Province. TAXON CODE. — 314. STATUS. — Nomen dubium. DIAGNOSIS. — “Test as with Family (campanulate, without apical horn and aperture). Shell is small, campanulate, single. Whole shell covered by linearly arranged continuous costae. Pores distributed in single row between costae, pores is small. Bottom of shell with a hollow cave.” (Li 1995: 335). REMARK It is not possible to determine the nature of this radiolarian from the figured specimen., Published as part of Noble, Paula, Aitchison, Jonathan C., Danelian, Taniel, Dumitrica, Paulian, Maletz, Jörg, Suzuki, Noritoshi, Cuvelier, Jessie, Caridroit, Martial & O'Dogherty, Luis, 2017, Taxonomy of Paleozoic radiolarian genera, pp. 419-502 in Geodiversitas 39 (3) on page 491, DOI: 10.5252/g2017n3a4, http://zenodo.org/record/5206585, {"references":["LI H. S. 1995. - New genera and species of middle Ordovician Nassellaria and Albaillellaria from Baijingsi, Quilian Mountains, China. Scientia Geologica Sinica 4 (3): 331 - 346."]}

Ehrenbergia Li, 1995 Ehrenbergia Li, 1995: 335. TYPE SPECIES. — Ehrenbergia baijingensis Li, 1995 (Li 1995: 335, pl. 1, fig. 10). AGE AND LOCATION OF TYPE MATERIAL. — Middle Ordovician: Darriwilian, the Baijingsi area in Qinghai Province. TAXON CODE. — 314. STATUS. — Nomen dubium. DIAGNOSIS. — “Test as with Family (campanulate, without apical horn and aperture). Shell is small, campanulate, single. Whole shell covered by linearly arranged continuous costae. Pores distributed in single row between costae, pores is small. Bottom of shell with a hollow cave.” (Li 1995: 335). REMARK It is not possible to determine the nature of this radiolarian from the figured specimen.

When we published the name Ehrenbergia Witkowski, Lange-Bertalot et Metzeltin (2000), we were unaware of the two already existing genus names in the phanerogams. We therefore propose a new name for our genus along with the appropriate new combinations.

A MICRO-ORGANISM identified provisionally as Spirochaeta rosea nom. prov. has been isolated from a marine upper littoral rock-pool at Woods Hole, Mass. The filaments are spiral, 5–200µ long, 0.7µ wide, with a regular pitch of about 7µ and an amplitude of 2µ (Figs. 1 and 2). Transverse cell walls, approximately 2.5µ apart, are revealed by phase-contrast or electron microscopy (Fig. 3). In size and form the organism resembles S. plicatilis Ehrbg. (= Ehrenbergia plicatilis (Ehrbg.) Gieszczykiewicz)1–4, but in mass the cells are seen to be pinkish or brick red. Growth is markedly aerophilic, with an optimum temperature of 35° C. In sea water supplemented with yeast extract (0.5 per cent) and tryptone (0.5 per cent), the doubling time is 100–120 min. At concentrations less than one-half sea water, growth is suppressed.