Patrick Jambura | University of Vienna (original) (raw)

Papers by Patrick Jambura

Biology

Almost half of all chondrichthyan species in the Mediterranean Sea are threatened with extinction... more Almost half of all chondrichthyan species in the Mediterranean Sea are threatened with extinction, according to the IUCN Red List. Due to a substantial lack of access to data on chondrichthyan catches in the Mediterranean Sea, especially of threatened species, the implementation of conservation measures is extremely insufficient. This also concerns the Adriatic Sea. Here we present a detailed and up-to-date assessment of the species occurring in Croatian waters, as the last checklist of chondrichthyans in Croatian waters was conducted in 2009. Occurrence records from historical data, literature and citizen science information have been compiled in order to present a comprehensive list of species occurrences. We found 54 chondrichthyan species between 1822 and 2022, consisting of a single chimaera, 23 rays and skates, and 30 shark species. Here, four additional species are listed but are considered doubtful. Five species are reported here for the first time for Croatian waters that w...

Diversity, Feb 21, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Diversity

The Late Jurassic-Early Cretaceous (164–100 Ma) represents one of the main transitional periods i... more The Late Jurassic-Early Cretaceous (164–100 Ma) represents one of the main transitional periods in life history. Recent studies unveiled a complex scenario in which abiotic and biotic factors and drivers on regional and global scales due to the fragmentation of Pangaea resulted in dramatic faunal and ecological turnovers in terrestrial and marine environments. However, chondrichthyan faunas from this interval have received surprisingly little recognition. The presence of numerous entire skeletons of chondrichthyans preserved in several localities in southern Germany, often referred to as Konservat-Lagerstätten (e.g., Nusplingen and the Solnhofen Archipelago), provides a unique opportunity of to study the taxonomic composition of these assemblages, their ecological distributions and adaptations, and evolutionary histories in detail. However, even after 160 years of study, the current knowledge of southern Germany’s Late Jurassic chondrichthyan diversity remains incomplete. Over the l...

Obwohl ein weitreichendes Spektrum an morphologischen und molekularen Daten zur Bestimmung von Ve... more Obwohl ein weitreichendes Spektrum an morphologischen und molekularen Daten zur Bestimmung von Verwandtschaftsverhaltnissen bei Haien und Rochen bereitsteht, liegen diese weitestgehend im Dunklen. Deshalb ist es wichtig, weitere Merkmale zu identifizieren, die dabei helfen konnen, eine robuste Knorpelfischsystematik zu etablieren. Die vorliegende Arbeit beschaftigt sich mit zwei Zahnmerkmalen – der Anzahl der Zahne innerhalb einer Zahnserie und der Zahnhistologie. Haie und Rochen konnen zwei Arten von Zahnhistologien aufweisen – entweder besitzen sie orthodonte Zahne (innerhalb der Zahnkrone befindet sich ein Hohlraum, die Pulpahohle, welche von einem speziellen Dentin, dem Orthodentin, umschlossen ist) oder osteodonte Zahne (hier ist die Pulpahohle mit Osteodentin gefullt). Haie der Ordnung Carcharhiniformes beinhalten ca. 60% aller Haiarten und sind dafur bekannt, eine orthodonte Bezahnung zu besitzen, mit einer einzigen Ausnahme – dem Fossilhai, Hemipristis elongata. Das Untersuc...

Tooth files showing the number of teeth, tooth stages and mineralization. (A) LMC3 (lowe... more Tooth files showing the number of teeth, tooth stages and mineralization. (A) LMC3 (lower jaw), (B) LPC3 (upper jaw) of Sphyrna zygaena (EMRG-Chond-J-8). Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; pc, pulp cavity; pq, palatoquadrate.</p

Tooth files showing the number of teeth, tooth stages and mineralization in (A) RMC3 (lo... more Tooth files showing the number of teeth, tooth stages and mineralization in (A) RMC3 (lower jaw) Galeocerdo cuvier, (B) RPC3 (upper jaw) Galeocerdo cuvier (EMRG-Chond-J-13), (C) LMC3 Prionace glauca, (D) LPC3 Prionace glauca (EMRG-Chond-J-6), (E) LMC3 Rhizoprionodon acutus, (F) LPC3 Rhizoprionodon acutus (EMRG-Chond-J-7). Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; pc, pulp cavity; pq, palatoquadrate.</p

Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lo... more Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lower jaw) Chaenogaleus macrostoma, (B) LPC3 (upper jaw) Chaenogaleus macrostoma (CD042), (C) LMC3 Hemigaleus microstoma, (D) LPC3 Hemigaleus microstoma (CD045), (E) LMC3 Paragaleus randalli, (F) LPC3 Paragaleus randalli (CD046). Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; pc, pulp cavity; pq, palatoquadrate.</p

(A) Jaw of Hemipristis elongata in anterior view, (B) anterior part o... more (A) Jaw of Hemipristis elongata in anterior view, (B) anterior part of the lower jaw of Hemipristis elongata, (C) Tooth series LPC6 of Hemipristis elongata. F, functional tooth; LMC, left Meckel’s cartilage; LPC, left palatoquadrate cartilage; MC, Meckel’s cartilage (lower jaw); PQ, palatoquadrate cartilage (upper jaw); R, replacement tooth; RMC, right Meckel’s cartilage, RPC, right palatoquadrate cartilage.</p

Tooth files showing the number of teeth, tooth stages and mineralization in (A), (B) LMC... more Tooth files showing the number of teeth, tooth stages and mineralization in (A), (B) LMC3 (lower jaw), (C), (D) LPC6 (upper jaw) of Hemipristis elongata EMRG-Chond-J-1. Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; os, osteodentine; pc, pulp cavity; pq, palatoquadrate.</p

Mediterranean Marine Science

The sandbar shark (Carcharhinus plumbeus) is considered rare in the Adriatic Sea and the majority... more The sandbar shark (Carcharhinus plumbeus) is considered rare in the Adriatic Sea and the majority of records originate from the northern Adriatic, where a nursery area for this species close to the Po delta system has been repeatedly proposed. This study provides 5 new records and analyses the previously published records of sandbar sharks recorded around the delta of the River Bojana (in Montenegro, in the south-eastern Adriatic). The River Bojana located on the border between Montenegro and Albania, is the second largest river flowing into the Adriatic Sea, where it forms a highly productive ecosystem already known as a local hotspot for smooth-hound sharks (Mustelus spp.). New records of sandbar sharks have emerged as a result of citizen science (a social media survey) and direct reports from fishermen. The total length of C. plumbeus juveniles ranged from approximately 800 mm to 1100 mm, and most (n=5) were caught by set gillnets. The data presented here show that juveniles are ...

Specimens are either deposited in the collection of the Department of Palaentology, Univ... more Specimens are either deposited in the collection of the Department of Palaentology, University of Vienna (UV) or in the collection of the Earth and Planetary Sciences of Birkbeck, University of London (BBK) and are publicly accessible.</p

All specimens are deposited in the collection of the Department of Palaentology at the U... more All specimens are deposited in the collection of the Department of Palaentology at the University of Vienna and are publicly accessible.</p

The white line indicates the plane of the section. (A), (B), (C) Carcharhinus l... more The white line indicates the plane of the section. (A), (B), (C) Carcharhinus leucas (EMRG-Chond-T-15) has a hollow pulp cavity surrounded by tightly packed orthodentine; (D, E, F) fully mineralized tooth of †Hemipristis serra (EMRG-Chond-T-11) with a thick layer of orthodentine, surrounding the osteodentine core; (G, H, I) the crown of Isurus oxyrinchus (EMRG-Chond-T-14) is fully filled by osteodentine. Orthodentine is absent in this species. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; os, osteodentine; pc, pulp cavity; pq, palatoquadrate.</p

The jaws show strong dignathic and monognathic heterodonty with slender anterior teeth f... more The jaws show strong dignathic and monognathic heterodonty with slender anterior teeth for grasping, and serrated lateral teeth for cutting the prey. Although the morphology of teeth within a horizontal row change drastically, the tooth histology is the same for each functional tooth. Scalebar = 0.5cm.</p

Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lo... more Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lower jaw) C. melanopterus, (B) LPC3 (upper jaw) C. melanopterus (EMRG-Chond-J-3), (C) LMC3 C. obscurus, (D) LPC3 C. obscurus (EMRG-Chond-J-5), (E) RMC3 C. signatus, (F) RPC3 C. signatus (EMRG-Chond-J-4). Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; pc, pulp cavity; pq, palatoquadrate.</p

(A), (B), (C) †Hemipristis curvatus (EMRG-Chond-T-20), the pulp cavit... more (A), (B), (C) †Hemipristis curvatus (EMRG-Chond-T-20), the pulp cavity is hollow with little intrusion of osteodentine from the root; (D), (E), (F) Carcharhinus leucas (EMRG-Chond-T-15), tooth with hollow pulp cavity and a shark border between the osteodentine of the root and the pulp cavity; (G), (H), (I) Galeocerdo cuvier (EMRG-Chond-T-16), tooth with hollow pulp cavity and a sharp border between the osteodentine of the root and the pulp cavity; scalebar = 1cm; en, enameloid; mc, Meckel’s cartilage; or, orthodentine; os, osteodentine; pc, pulp cavity; pq, palatoquadrate.</p

(A) Mineralization sequence of the root in Hemipristis elongata; (B) ... more (A) Mineralization sequence of the root in Hemipristis elongata; (B) fully mineralized tooth with fully filled pulp cavity and dense osteodentine in the root in †Hemipristis serra (EMRG-Chond-T-11); (C) tooth with hollow pulp cavity in the crown and porous osteodentine within the root displaying a replacement tooth of †Hemipristis serra (EMRG-Chond-T-9). Scalebar = 1cm.</p

Table showing the degree of mineralization for every tooth within the tooth files LMC3 a... more Table showing the degree of mineralization for every tooth within the tooth files LMC3 and LMC4. Tooth files of the lower jaw show an alternate mineralization pattern, with replacement teeth of one file showing a higher degree of mineralization than teeth of the adjacent file. en, enameloid; or, orthodentine; os, osteodentine.</p

Biology

Diversity, Feb 21, 2023

Diversity

Mediterranean Marine Science

Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lo... more Tooth files showing the number of teeth, tooth stages and mineralization in (A) LMC3 (lower jaw) C. melanopterus, (B) LPC3 (upper jaw) C. melanopterus (EMRG-Chond-J-3), (C) LMC3 C. obscurus, (D) LPC3 C. obscurus (EMRG-Chond-J-5), (E) RMC3 C. signatus, (F) RPC3 C. signatus (EMRG-Chond-J-4). Scalebar = 0.5cm. en, enameloid; mc, Meckel’s cartilage; or, orthodentine; pc, pulp cavity; pq, palatoquadrate.</p