Franklinella Stewart and Hendrix, 1945

Olempska, Ewa, 2002, The Late Devonian Upper Kellwasser Event and entomozoacean ostracods in the Holy Cross Mountains, Poland, Acta Palaeontologica Polonica 47 (2), pp. 247-266 : 262

publication ID

https://doi.org/ 10.5281/zenodo.13175595

DOI

https://doi.org/10.5281/zenodo.13175625

persistent identifier

https://treatment.plazi.org/id/03D59C10-FFA5-FFDA-FCFC-3F81238DFAC8

treatment provided by

Felipe

scientific name

Franklinella Stewart and Hendrix, 1945
status

 

Genus Franklinella Stewart and Hendrix, 1945 View in CoL

Franklinella (Franklinella) sigmoidale Müller−Steffen, 1964 . —This species ( Fig. 12A–E View Fig ) is abundant in the post−event partofthePłuckisection(samplesP−138toP−166).Itslateral outline is subquadrate, and the dorsal margin is long and straight.Theposteriorendismorenarrowlyroundedthanthe anterior end, and the ventral margin is gently curved. The sulcusisnarrowandextendsfromthedorsalmargintobelow the mid−height. In the posterodorsal part of the carapace, a small,conicalspine,directedslightlyoutwardsandupwards, occurs. Asimilar but larger spine occurs in the anteroventral partofthecarapace.Thesurfacebearseighttotenlongitudinal narrow ribs with wide intercostal spaces, which run at a slight angle to the dorsal margin and tend to converge towards the spines. Some intercalated ribs are also present. Threeribsareconcentricandparalleltotheposteriormargin and two are parallel to the anterior margin.

Range and occurrence.—This species occurs in the early Famennian, F. (F.) sigmoidale Zone , of Europe (Rhenish Slate Mts., Harz Mts., Holy Cross Mts.) and South China. However in South China it is also noted from the Early R. serratostriata N. nehdensis Zone.

Franklinella (Franklinella) cf. calcarata ( Richter, 1856) .— This rare and small (up to 1 mm long) species (Fig. 9G) has beenfoundinsamplesP−13andP−17.Thesurfacebearsfive longitudinal ribs with wide intercostal spaces. Small spines arepresentintheposterodorsalandtheanteroventralpartsof thecarapace,theanteroventralspinesarebrokeninallspecimens. The sulcus is very poorly developed.

Range and occurrence.—This species is known from the middle and late Frasnian, W. cicatricosa Zone up to E. (E.) splendens Zone , of Europe and South China. However it is also noted from the early Famennian, F. (F.) sigmoidale Zone.

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