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Shark – the How and Why of an Exhibit

100%

Jagt J. W. M. , Jagt‑Yazykova E. A.

Zoophilologica. Polish Journal of Animal Studies

2017

nr 3

261-279

"For more than a decade, it has been a tradition at the Natuurhistorisch Museum Maastricht (NHMM; province of Limburg, the Netherlands; see Fig. 1) for the curators to work out concepts for new temporary exhibits, write all texts, select natural specimens to be put on display, and co-operate closely with technicians and designers. Half a year prior to the dismantling of “Biomimicry”, the theme of the next exhibit had already been fully established, and a “skeleton” of the displays and texts devised. On 25 June 2016, the exhibit HAAI (Dutch for shark) was opened (see: www.nhmmaastricht.nl/exposities/haai.html; www.facebook. com/NatuurhistorischMuseumMaastricht)."

The Late Jurassic neoselachian Macrourogaleus FOWLER, 1947 is a palaeospinacid shark (Elasmobranchii; Synechodontiformes)

75%

Klug S.

Acta Geologica Polonica

2008

tom Vol. 58, no. 2

229-234

The taxonomy of palaeospinacid sharks (Chondrichthyes, Neoselachii) is reviewed. New skeletal material from the famous Late Jurassic lithographic limestones of southern Germany (Solnhofen area and Nusplingen) enables identification of the morphological and dental differences between Synechodus and Paraorthacodus. These taxa were hitherto known mainly by isolated teeth or a few mostly fragmentary skeletal remains from the Early and Late Jurassic and Late Cretaceous. Differences not only include dental features but also the presence of a single dorsal fin in Paraorthacodus compared to two in Synechodus. Fin spines are restricted to Early Jurassic specimens. A detailed examination of the small neoselachian shark, Macrourogaleus hassei, from the lithographic limestones of the Solnhofen area revealed that this taxon displays the characteristic synechodontiform tooth root morphology (pseudopolyaulacorhize) and a single dorsal fin as seen in Paraorthacodus. Consequently, Macrourogaleus is assigned to the Palaeospinacidae. It differs from Paraorthacodus, however, in the presence of a single row of enlarged placoid scales on the caudal crest.

Interrelationships of Mesozoic hybodont sharks as indicated by dental morphology - preliminary results

63%

Rees J.

Acta Geologica Polonica

2008

tom Vol. 58, no. 2

217-221

As many hybodont sharks are known solely from their teeth, this investigation approaches the phylogeny of the group with an emphasis on tooth morphology and dentitional patterns. The preliminary results presented here suggest that at least four different lineages of hybodont sharks occurred in the Mesozoic. Dentitional characters imply a close relationship within the Lonchidiidae (Lonchidion, Vectiselachos, Parvodus, and tentatively Hylaeobatis), within the Hybodontinae (Hybodus and Egertonodus) and in another, unnamed subfamily of the Hybodontidae, including Planohybodus, Secarodus and Priohybodus. There is also weak support for a grouping of Acrodus, Asteracanthus and Palaeobates in the Acrodontinae, while Lissodus is left without family designation due to a rather unique dentition and cephalic spine morphology. "Polyacrodus" is considered a nomen dubium as there are no characters to diagnose the genus based on the type species.

Ctenacanthiform Cladodont Teeth from the Lower PermianWichita Group, Texas, U.S.A.

51%

Johnson G.

Acta Geologica Polonica

2008

tom Vol. 58, no. 2

205-209

Isolated teeth of Glikmanius occidentalis occur in ten vertebrate faunas in the Waggoner Ranch Formation and in one fauna in the underlying Petrolia Formation. They range in size (anteromedial-posterolateral base length) from 1.28 mm to 10.15 mm (n = 12). In addition to the typical teeth, one with an asymmetrical base and one possible posterior tooth (both G. ?occidentalis), and a questionable symphyseal tooth (Glikmanius?), occur in the collection.

A new occurrence of sharks in the Menilite Formation (Lower Oligocene) from the Outer (Flysch) Carpathians of Poland

51%

Bieńkowska-Wasiluk M.

Acta Geologica Polonica

2009

tom Vol. 59, no. 2

235-243

Two newly recognized sections (Jamna Dolna 2 and Wola Czudecka) of the Lower Oligocene Menilite Shales (Menilite Formation) in the Polish Outer (Flysch) Carpathians have recently yielded a small shark assemblage. It comprises teeth of Heptranchias howelli (Reed, 1946), not hitherto reported from Europe, as well as the remains of other sharks (teeth of ?Mitsukurina, Alopias, gillrakers of Cetorhinus) all contributing to the fish assemblage of the Carpathian Menilite Formation, which has long been famous mostly for its teleost content. The life environment of the studied sharks and the basin bottom conditions are briefly discussed.