Clavofabella subcylipdrica
- Dataset
- Late Devonian-early Carboniferous ostracods (Crustacea) from South China: taxonomy, diversity and implications
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Ostracoda
- order
- Palaeocopida
- family
- Primitiopsidae
- genus
- Clavofabella
- species
- Clavofabella subcylipdrica
description
Dimensions RV: L = 204 – 805 µm, H = 139 – 554 µm, H / L = 0.68 – 0.74. LV: L = 202 – 805 µm, H = 136 – 546 µm, H / L = 0.65 – 0.73.
description
Fig. 5 M – R
description
Occurrence Samples 19 BAI 68, 19 BAI 69, Gelaohe Formation, Blue Snake section, Famennian, late Devonian (this work).
discussion
Remarks Our material is morphologically close to non-dolonate specimens of Clavofabella multidentata Martinsson, 1955 from the Late Wenlock, Silurian of Mulde, Parish Fröjel, Gotland, Sweden (Martinsson 1955) but differs by its more rounded cardinal angles, deeper sulcus and larger adductorial pit. It is also close to Libumella? sp. from the Famennian, late Devonian of the Yjid-Kamenka River section, Pechora Uplift, Russia (Sobolev 2020) but our material differs from this species by its more laterally compressed free margin, its deeper sulcal pit and its more developed lobation. This species may be new to science but the 16 specimens discovered are not sufficient to establish its generic attribution and to reasonably describe its diagnostic characters. Six different ontogenetic stages are present in our material (from A- 5 to Ad). The ontogenetic changes through development cannot be precisely observed because of preservation but it seems that the outline does not show major changes, the sulcus apparently becomes deeper and the anterior lobe more developed.
materials_examined
Material examined CHINA • 1 complete carapace (Ad, Fig. 5 M); Blue Snake section, Gelaohe Formation, sample 19 BAI 68; P 6 M 3847 • 1 complete carapace (A- 1, Fig. 5 N); Blue Snake section, Gelaohe Formation, sample 19 BAI 69; P 6 M 3848 • 1 complete carapace (A- 2, Fig. 5 O); Blue Snake section, Gelaohe Formation, sample 19 BAI 68; P 6 M 3849 • 1 complete carapace (A- 3, Fig. 5 P); Blue Snake section, Gelaohe Formation, sample 19 BAI 68; P 6 M 3850 • 1 complete carapace (A- 4, Fig. 5 Q); Blue Snake section, Gelaohe Formation, sample 19 BAI 68; P 6 M 3851 • 1 complete carapace (A- 5, Fig. 5 R); Blue Snake section, Gelaohe Formation, sample 19 BAI 68; P 6 M 3852 • 10 complete carapaces; Blue Snake section, Gelaohe Formation, sample 19 BAI 68. All from the Famennian, late Devonian.
Name
- Homonyms
- Clavofabella subcylipdrica