The Late Devonian Upper Kellwasser Event and entomozoacean ostracods in the Holy Cross Mountains, Poland Author Olempska, Ewa text Acta Palaeontologica Polonica 2002 2002-12-31 47 2 247 266 journal article 10.5281/zenodo.13175595 1732-2421 13175595 Genus Franklinella Stewart and Hendrix, 1945 Franklinella ( Franklinella ) sigmoidale Müller−Steffen, 1964 . —This species ( Fig. 12A–E ) 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.