NEWSLETTER 07/2020 06.07.2020

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New Images

Recurvacanthus uniserialis DUFFIN, 1981

Missing papers:

Many thanks to all friends of shark-references, who sent us some missing papers last month!

Shark-References would kindly like to ask you for your contribution to this project.

At the moment we are looking for some of the following papers:


Extinct Chondrichthyes:
NEWTON, E.T.  (1878) The chimeroid fishes of the British Cretaceous rocks. Memoirs of the Geological Survey of the United Kingdom, Monograph, 4: 1–64

CHAPMAN, F.  (1918) Descriptions and revisions of the Cretaceous and Tertiary fish-remains of New-Zealand. New Zealand Department of mines, Geological Survey Branch, Palaeontological Bulletin, 7: 1–45, pl. 1–9

MATSUMOTO, H. (1936) Upper Miocene vertebrates from Kumanodô, Natori district, province of Rikuzen. Dobutsugaku Zasshi, 48: 475–480, 5 fig.

ALVINERIE, J. & ANDREIEFF, P. & ANGLADA, R. & AUBERT, J. & CAPPETTA, H. & CARALP, M. & CARATINI, C. & CARBONNEL, G. & CATZIGRAS, F. & COURME-RAULT, M.-D. & CHATEAUNEUF, J.-J. & DEMARCQ, G. & DUCASSE, O. & FATTON, E. & GLAÇON, G. & LABRACHERIE, M. & LAURIAT, A. & LE CALVEZ, Y. & LORENZ, C. & MAGNE, J. & MARGEREL, J.-P. & POIGNANT, A. & PUJOL, C. & ROGER, J. & ROMAN, J. & BLONDEAU, A. & MULLER, C. (1973) A propos de la limite oligo-miocène: résultats préliminaires d'une recherche collective sur les gisements d'Escornébéou (Saint-Géours-de-Maremne, Landes, Aquitaine méridionale). Présence de Globigerinoides dans les faunes de l'Oligocène supérieur. Comptes rendus sommaires des séances de la Société géologique de France: 75–76

BOYD, B.M. (2016) Fossil sharks and rays of Gainesville creeks; Alachua County, Florida: Hogtown group; (middle Miocene to lower Pliocene). Florida Paleontological Society, Special Publication


Extant Chondrichthyes:

KAMOHARA, T. (1943) Some unrecorded and two new fishes from Prov. Tosa, Japan. Bulletin of the Biogeographical Society of Japan, 13 (17): 125–137

DE BUEN, F. (1950) Contribuciones a la Ictiología. II. El tiburón vitamínico de la costa uruguaya Galeorhinus vitaminicus nov. sp., y algunas consideraciones generales sobre su biología. Publicaciones Cientificas, Servicio Oceanografico y de Pesca, Ministerio de Industrias y Trabajo, Montevideo No. 4: 153–162.

CADENAT, J. (1951) Initiations Africaines. III. Poissons de Mer du Sénégal. Institute Francais d'Afrique Noire. Initiations Africaines. III. Poissons de Mer du Sénégal.: 1–345

WEIBEZAHN, F.H. (1953) Una nueva especie de Scyliorhinus de Venezuela (Chondrichthyes - Elasmobranchii). Novedades cientificas. Serie zoológica. Museo de Historia Natural La Salle, 9: 1–7.

SMITH, J.L.B. (1958) The mystery killer, the new shark Carcharhinus vanrooyeni. Veld & Vlei, 3 (9): 12–14, 28.

SICCARDI, E. (1961) Cetorhinus en el Atlantico sur (Elasmobranchii: Cetorhinidae). Actas y trabajos del Primer Congreso Sudamericano de Zoologia, 4 (5): 251–263

GUBANOV, E.P. & SCHLEIB, N.A. (1980) Sharks of the Arabian Gulf. Kuwait Ministry of Public Works, Agracultural Department, Fisheries Division. Sharks of the Arabian Gulf.: 1–69

DOLGANOV, V.N. (1983) Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod. [Manual for identification of cartilaginous fishes of Far East seas of USSR and adjacent waters.] TINRO, Vladivostok. Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod.: 92 pp.



Please support www.shark-references.com and send missing papers (not listed papers or papers without the info-symbol) to juergen.pollerspoeck@shark-references.com or nicolas.straube@shark-references.com

Upcoming Meetings:

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VIANA, S.T.F.L. & DE CARVALHO, M.R. (2020): Squalus shiraii sp. nov. (Squaliformes, Squalidae), a new species of dogfish shark from Japan with regional nominal species revisited. Zoosystematics and Evolution, 96 (2): 275-311
New species: Squalus shiraii
Abstract: A new species of deep-water dogfish shark, Squalus shiraii sp. nov., is described herein as endemic to the tropical waters off Southern Japan. This species has been largely misidentified with S. mitsukurii. However, morphological, meristic and morphometric evidence support it to be a separate and undescribed species. Squalus shiraii sp. nov. differs from this species by having body brown in colour dorsally, caudal fin with ventral and dorsal tips markedly tapered and broadly white, dermal denticles uniscuspidate and lanceolate and larger number of precaudal (91–94) and total vertebrae (120–123) (vs. body dark grey to black; caudal fin with ventral and dorsal tips rounded and not white in colour; denticles tricuspidate and rhomboid; 86–90 precaudal and 116–117 total vertebrae). Squalus shiraii sp. nov. is also clearly separated from other Japanese congeners which are herein revisited to include six species, based on the examination of over 150 specimens caught from Japanese waters that were available in ichthyological collections: S. mitsukurii, S. japonicus, S. acutirostris, S. brevirostris and S. suckleyi. Squalus mitsukurii, S. japonicus and S. brevirostris are re-described in detail and the neotype of S. japonicus is herein designated. Squalus acutirostris is treated as a valid species with occurrences in Japan, China and Taiwan and, thus, a provisional diagnosis is given, as well as an updated diagnosis of S. suckleyi. A key to Squalus species from the North-western Pacific Ocean is given and main morphological differences between S. shiraii sp. nov. and the closest related species are discussed.

Extinct Chondrichthyes:

MAISEY, J.G. & EHRET, D.J. & DENTON, J.S.S. (2020): A New Genus of Late Cretaceous Angel Shark (Elasmobranchii; Squatinidae), with Comments on Squatinid Phylogeny. American Museum Novitates, 3954: 1-29
New genus: Cretasquatina
New species: Cretasquatina americana
Abstract: Three-dimensional Late Cretaceous elasmobranch endoskeletal elements (including palatoquadrates, ceratohyals, braincase fragments, and a series of anterior vertebrae) are described from the Late Cretaceous University of Alabama Harrell Station Paleontological Site (HSPS), Dallas County, Alabama. The material is referred to the extant elasmobranch Family Squatinidae on the basis of several distinctive morphological features. It also exhibits features not shared by any modern or fossil Squatina species or the extinct Late Jurassic squatinid Pseudorhina. A new genus and species is erected, despite there being some uncertainty regarding potential synonymy with existing nominal species previously founded on isolated fossil teeth (curiously, no squatinid teeth have been documented from the HSPS). A preliminary phylogenetic analysis suggests that the new genus falls on the squatinid stem, phylogenetically closer to Squatina than Pseudorhina. The craniovertebral articulation in the new genus exhibits features considered convergent with modern batomorphs (skates and rays), including absence of contact between the posterior basicranium and first vertebral centrum, and a notochordal canal which fails to reach the parachordal basicranium. Supporting evidence that similarities in the craniovertebral articulation of squatinoids and batomorphs are convergent rather than synapomorphic (as "hypnosqualeans") is presented by an undescribed Early Jurassic batomorph, in which an occipital hemicentrum articulates with the first vertebral centrum as in all modern sharklike (selachimorph) elasmobranchs. The fossil suggests instead that the batomorph synarcual evolved by fusion of the anterior basiventral and basidorsal cartilages prior to the reduction of the anterior centra and loss of the occipital hemicentrum, not afterward as predicted by the hypnosqualean hypothesis.



LEBEDEV, O.A. & IVANOV, A.O. & LINKEVICH, V.V. (2020): Chondrichthyan spines from the Famennian (Upper Devonian) of Russia. Acta Geologica Polonica, 70: in press
New species: Sculptospina makhlaevi
Abstract: Very rare chondrichthyan spines from the Famennian (Upper Devonian) of European Russia are referred here to ctenacanthiforms, euselachians and a chondrichthyan group of uncertain systematic position. Ctenacanthus Agassiz, 1837 is recorded from the lower and middle Famennian of the central and north-western parts of the area. Sculptospina makhlaevi Lebedev gen. et sp. nov. originates from the lower Famennian of the Lipetsk Region. The holotype of ‘Ctenacanthus’ jaekeli Gross, 1933 and a new specimen from the upper Famennian of the South Urals are shown to belong to the same taxon, which is transferred to Acondylacanthus St. John and Worthen, 1875. New specimens of Tuberospina nataliae Lebedev, 1995 from the upper Famennian of Central Russia are described in detail. The newly presented material increases our knowledge of the composition of Famennian marine assemblages from the East European Platform. It is suggested that these assemblages may be classified as chondrichthyan-dominated and dipnoan-dominated. Hypothetically, after the end-Devonian Hangenberg extinction event, which affected numerous secondary consumers in vertebrate communities, some chondrichthyan groups could have encroached to take advantage of previously occupied ecological niches. Ctenacanthus, as well as Acondylacanthus and Amelacanthus survived the end-Devonian mass extinction to continue into the Carboniferous.


SAMBOU, B.S. & HAUTIER, L. & SARR, R. & TABUCE, R. & LIHOREAU, F. & THIAM, M. & LEBRUN, R. & MARTIN, J.E. & CAPPETTA, H. & ADNET, S. (2020): Contribution to the reappraisal of the mid Paleogene ichtyofauna of Western Africa with three new enigmatical elasmobranchs from Thanetian–Lutetian of Senegal. Annales de Paléontologie, in press
New genus: Atlantitrygon, Microtriftis
New species: Atlantitrygon senegalensis, Microtriftis matamensis, Odontorhytis priemi
Abstract: We report here three new elasmobranch fossil taxa from Thanetian–Lower Lutetian nearshore marine deposits of northeastern (Matam region) and central-western (Sine-Saloum region) Senegal. These three new taxa represent the oldest species of the enigmatical elasmobranch Odontorhytis, the oldest putative representatives of marine potamotrygonid, and an uncertain dasyatoid genus with the smallest grinding dentition ever described. These new taxa, representing the second Cenozoic elasmobranch remains formally described from Senegal, broaden our understanding of their evolutionary and biogeographic history in the equatorial Eastern Atlantic during this time period. Their occurrences confirm hypothesised stratigraphically correlations between the top of Matam Fm. and the base of Lam Lam Fm., refine the marine connections between these two Senegalese regions, and suggest that these genera were broadly distributed within the shallow marine settings of the equatorial Eastern Atlantic during latest Paleocene–early Middle Eocene.
 

WARREN, M.B. & BAKENHASTER, M.D. & SCHARER, R.M. & POULAKIS, G.R. & BULLARD, S.A. (2020): A new genus and species of fish blood fluke, Achorovermis testisinuosus gen. et sp. n. (Digenea: Aporocotylidae), infecting critically endangered smalltooth sawfish, Pristis pectinata (Rhinopristiformes: Pristidae) in the Gulf of Mexico. Folia Parasitologica, 67: 009
New genus: Achorovermis
New species: Achorovermis testisinuosus
Abstract: Achorovermis testisinuosus gen. et sp. n. (Digenea: Aporocotylidae) infects the heart of the smalltooth sawfish, Pristis pectinata Latham (Rhinopristiformes: Pristidae), in the eastern Gulf of Mexico. Specimens of the new genus, along with the other blood flukes that infect batoids are similar by having an inverse U-shaped intestine and a curving testis as well as by lacking tegumental spines. The new genus differs from all of the other blood flukes infecting batoids by having an elongate body (>50 × longer than wide), a testis having >100 curves, and an ovary wholly anterior to the uterus. It differs from Ogawaia glaucostegi Cutmore, Cribb et Yong, 2018, the only other blood fluke infecting a rhinopristiform, by having a body that is >50 × (vs <30 ×) longer than wide, a testis that is >75 × (vs <40 ×) longer than wide and has >100 (vs <70) curves, an ovary wholly anterior to (vs lateral and dorsal to) the seminal vesicle, a uterus wholly posterior to (vs overlapping and lateral to both) the testis and ovary, and a sinuous (vs convoluted) uterus. The new species joins a small group of chondrichthyan blood flukes that lack tegumental spines: O. glaucostegi, Orchispirium heterovitellatum Madhavi et Rao, 1970, Myliobaticola richardheardi Bullard et Jensen, 2008, Electrovermis zappum Warren et Bullard, 2019. Blood flukes infecting batoids are further unique by having a curving testis. That is, the blood flukes infecting species within Selachii are morphologically distinct from those infecting species within the Batoidea (excluding Gymnurahemecus bulbosus Warren et Bullard, 2019). Based on the morphological similarity, we suspect that the new species shares a recent common ancestor with O. glaucostegi. The discovery of the new species brings the total number of chondrichthyan blood flukes to 11 species assigned to nine genera.
 

PLEASE send your new papers to
juergen.pollerspoeck@shark-references.com or 
nicolas.straube@shark-references.com   

Latest Research Articles

DUFFIN, C. & LARS, J. (2020) A fin spine of Recurvacanthus (Myriacanthidae, Holocephali) from the Posidonienschiefer (Early Jurassic) of SW Germany. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen Band, 296 (3): 317-326  https://dx.doi.org/10.11646/zootaxa.4803.2.3
EVERAERT, S. (2020) Parotodus benedenii (Le Hon, 1871) uit het Zand van Antwerpen (Midden Mioceen) te Berchem (Antwerpen, België). Afzettingen WTKG, 41 (2): 36-40
LEBEDEV, O.A. & IVANOV, A.O. & LINKEVICH, V.V. (2020) Chondrichthyan spines from the Famennian (Upper Devonian) of Russia. Acta Geologica Polonica, 70: in press https://dx.doi.org/10.3354/dao03458
LOPES, R.P. & PEREIRA, J.C. & DILLENBURG, S.R. & TATUMI, S.H. & YEE, M. & FIGUEIREDO, A.M.G. & KINOSHITA, A. & BAFFA, O. (2020) Late Pleistocene-Holocene fossils from Mirim Lake, Southern Brazil, and their paleoenvironmental significance: I - Vertebrates. Journal of South American Earth Sciences, 100: 102566  https://dx.doi.org/10.1016/j.marpol.2020.103920
MAISEY, J.G. & EHRET, D.J. & DENTON, J.S.S. (2020) A New Genus of Late Cretaceous Angel Shark (Elasmobranchii; Squatinidae), with Comments on Squatinid Phylogeny. American Museum Novitates, 3954: 1-29 https://dx.doi.org/10.1371/journal.pone.0228253
SAMBOU, B.S. & HAUTIER, L. & SARR, R. & TABUCE, R. & LIHOREAU, F. & THIAM, M. & LEBRUN, R. & MARTIN, J.E. & CAPPETTA, H. & ADNET, S. (2020) Contribution to the reappraisal of the mid Paleogene ichtyofauna of Western Africa with three new enigmatical elasmobranchs from Thanetian–Lutetian of Senegal [Contribution à la réévaluation de l’ichtyofaune du Paléogène moyen en Afrique de l’Ouest avec trois nouveaux élasmobranches énigmatiques du Thanétien–Lutétien du Sénégal]. Annales de Paléontologie, in press
TAKAKUWA, Y. & HIROSE, K. & KUROSU, H. (2020) The first occurrence of fossil sharpnose sevengill shark (Heptranchias; Hexanchiformes) from the Eocene Sakasegawa Formation, Amakusa, Kumamoto, Japan. Bulletin of Gunma Museum of Natural History, 24: 25-30
TRIF, N. & GHAEMI, F. & TAHERI, J. & TAHERPOUR-KHALIL-ABAD, M. (2020) Short note on the first record of fossil shark teeth in the Chehel-Kaman formation, Iran. Geoloski anali Balkanskoga poluostrva, in press  https://dx.doi.org/10.23788/ief-1113
VILLAFAÑA, J.A. & MARRAMÀ, G. & KLUG, S. & POLLERSPÖCK, J. & BALSBERGER, M. & RIVADENEIRA, M. & KRIWET, J. (2020) Sharks, rays and skates (Chondrichthyes, Elasmobranchii) from the Upper Marine Molasse (middle Burdigalian, early Miocene) of the Simssee area (Bavaria, Germany), with comments on palaeogeographic and ecological patterns. Paläontologische Zeitschrift, in press  https://dx.doi.org/10.1007/s41208-020-00209-9

MISCELLANEOUS:

A new character for Pokémon? Novel endemic dogfish shark species discovered from Japan

Date: June 11, 2020

Source: Pensoft Publishers

Summary: A new endemic deep-water dogfish shark: Squalus shiraii, was discovered in the tropical waters of Southern Japan by an international team of scientists. The finding brings the amount of spurdogs shark species inhabiting Japanese waters to six.

Great white shark diet surprises scientists

Understanding how sharks feed is vital for managing human interactions

Date: June 7, 2020

Source: University of Sydney

Summary: The first-ever detailed analysis of the diet of great white sharks has shown they spend more time feeding at the seafloor than many would have expected.