Bairdia cassiana ( Reuss, 1869 ),

Forel, Marie-Béatrice, Kolar-Jurkovšek, Tea & Jurkovšek, Bogdan, 2020, Ostracods from the ‘ Raibl Beds’ (Carnian, Late Triassic) of Belca section in Karavanke Mountains, northwestern Slovenia, Geodiversitas 42 (21), pp. 377-407: 384

publication ID

http://doi.org/ 10.5252/geodiversitas2020v42a21

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:7EC0E4FA-D538-4CE2-91B8-D7F549C32985

DOI

http://doi.org/10.5281/zenodo.4447746

persistent identifier

http://treatment.plazi.org/id/5A3887A8-FF98-0E7D-0CD7-FF791E350EEF

treatment provided by

Felipe

scientific name

Bairdia cassiana ( Reuss, 1869 )
status

 

Bairdia cassiana ( Reuss, 1869) 

( Fig. 4View FIG F-H)

Cythere cassiana Reuss, 1869: 108  .

Bairdia cassiana  – Gümbel 1869: 180, pl. 5, figs 18, 19. — Styk 1958: 171, fig. 3/1. — Urlichs 1970: 705, 706, pl. 1, figs 1, 2. — Kristan-Tollmann 1978: 81, pl. 1, fig. 4; pl. 6, fig. 6. — Kristan-Tollmann et al. 1991b: 200, pl. 1, fig. 5. — Monostori & Tóth 2013: 310, pl. 2, figs 7, 8, 10; 2014: 26, pl. 1, fig. 14. — Mette et al. 2014: pl. 2, fig. 1. — Crasquin et al. 2018: 134, fig. 6M.

Bairdia cassiana rotundidorsata Monostori, 1995: 42  , pl. 2, figs 4, 5. Bairdia (Rectobairdia) garciai Crasquin-Soleau & Grădinaru, 1996: 77  , 78, pl. 2, figs 5, 8.

EXAMINED MATERIAL. — Four right valves, four left valves and several fragments. 

OCCURRENCE. — Early Carnian, Late Triassic, Southern Alps, Italy ( Reuss 1869; Gümbel 1869; Urlichs 1970; Kristan-Tollmann 1978); Carnian, Late Triassic, Święty Krzyż Mountain, Poland ( Styk 1958); Carnian, Late Triassic, Zsämbek-14 borehole,Transdanubian Range, Hungary (Kristan-Tollmann et al. 1991b); Late Anisian, Middle Triassic, Balatón Highland, Hungary ( Monostori 1995); Early Anisian, Middle Triassic, North Dobrogea, Romania (Crasquin-Soleau & Grădinaru 1996); Ladinian, MiddleTriassic, Balatón Highland, Hungary ( Monostori & Tóth 2013, 2014); Middle Anisian, Middle Triassic, Northern Calcareous Alps, Austria ( Mette et al. 2014); Tropites dilleri  zone, late Carnian, Late Triassic, Sicily, Italy (Crasquin et al. 2018); Nicoraella  ? budaensis conodont zone, late Julian-?earliest Tuvalian, Carnian, Late Triassic, samples BE17, 18, 21, 23/1 ( Fig. 3View FIG), Belca section, ‘Raibl Beds’, Karavanke Mountains, Slovenia (this work).

DIMENSIONS. — Fig. 5B.View FIG

DISCUSSION

Bairdia cassiana ( Reuss, 1869)  has been found in all samples from BE17 to BE23/1 where it is not abundant, and it is moderately abundant in BE18 ( Fig. 3View FIG). Bairdia cassiana  is typical of the Middle and early Late Triassic of Europe, as shown by the synonym list. The height/length scatter plot of all Carnian specimens is shown in Fig. 5BView FIG (the dimensions of the specimens cited without mention of their nature, i.e. right valve, left valve or carapace, have been omitted). The largest specimens are from the Ladinian of Hungary ( Monostori & Tóth 2013, 2014). The separate measurements of right and left valves of complete carapaces show that the degree of overlap is relatively constant during the ontogeny of this species. The left valve is slightly longer than the right valve in the first instars compared to later stages. The ontogenetic development of B. cassiana  is also marked by the elongation of the posterior border.

Kingdom

Animalia

Phylum

Arthropoda

Class

Ostracoda

Order

Podocopida

Family

Bairdiidae

Genus

Bairdia

Loc

Bairdia cassiana ( Reuss, 1869 )

Forel, Marie-Béatrice, Kolar-Jurkovšek, Tea & Jurkovšek, Bogdan 2020
2020
Loc

Bairdia cassiana rotundidorsata

MONOSTORI M. 1995: 42
1995
Loc

Bairdia cassiana

MONOSTORI M. & TOTH E. 2013: 310
URLICHS M. 1970: 705
STYK O. 1958: 171
1958
Loc

Cythere cassiana

REUSS A. E. 1869: 108
1869