| 1. |
- Mueller-Towe, Inken J., et al.
(författare)
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First chelonian eggs and carapace fragments from the Pliocene of Rhodes, Greece
- 2011
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Ingår i: Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen. - : Schweizerbart. - 0077-7749. ; 262:3, s. 309-322
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Tidskriftsartikel (refereegranskat)abstract
- Well-preserved fossil eggs and eggshell fragments from the Pliocene Apolakkia Formation of Rhodes (Greece) are described. The eggs were found in-situ in a clutch. They are sub- spherical with lengths of 53-60 mm and widths of about 40 mm. All eggs are diagenetically compressed and their original diameters are estimated at 45-50 mm. The eggshells are 0.3-0.5 mm thick, partly re-crystallized, but widely still aragonitic. They consist of needle-like crystals that form individual shell units. A few pores are preserved between these shell units. This shell-structure allows assignment to chelonian eggs in the oofamily Testudoolithidae and the oogenus Testudolithus. The external morphology, microstructure and mineralogical composition of the eggshells show close resemblance to eggs of the extant tortoise Geochelone elephantopus. Together with a small association of turtle carapace fragments from the same formation, the clutch represents the first discovery of turtle and reptilian remains from the Pliocene of the island of Rhodes.
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| 2. |
- Doguzhaeva, Larisa, et al.
(författare)
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Pro-ostraca of Triassic belemnoids (Cephalopoda) from Northern Calcareous Alps, with observations on their mode of preservation in an environment of northern Tethys which allowed for carbonization of non-biomineralized structures.
- 2012
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Ingår i: N. Jb. Geol. Paläont. Abh.. - Stuttgart : Schweizerbart. ; 266:1, s. 31-38
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Tidskriftsartikel (refereegranskat)abstract
- A pro-ostracum – the anterior dorsal plate subdivided into three longitudinal fields – isdeveloped in Triassic phragmoteuthids (Phragmoteuthis, Breviconoteuthis) and the belemnotheutid? (Lunzoteuthis) but is missing in aulacocerids which have a pro-ostracum-like structure – the dorsal apertural crest with arched growth lines. Two types of pro-ostraca: a Phragmoteuthis-type, characterized by arched growth lines in each field, and a Lunzoteuthis-type, in which the median field has arched growth lines and lateral fields bear converging longitudinal ridges, are distinguished. The pro-ostracum with the ridged lateral fields evidently obtained further rapid development; in the Sinemurian belemnite Nannobelus the ridged lateral fields are already formed by the longitudinally exposed narrow portions of succeeding, overlapping sublayers of the pro-ostracum. This structure apparently enabled efficient mantle/shell linkage that facilitated effective manoeuvring, an active mode of life and global radiation of Jurassic belemnites. Exceptional, large scale, preservation of pro-ostraca in lower Carnian of Schindelberg, Lower Austria, and Raibl, North Italy, was possibly due to the concurrency of (1) an environment of the northern Tethys that allowed for post-mortem carbon substitution of chitin and other non-biomineralized material, such as ink and mantle tissue, and (2) the inorganic-organic composition of pro-ostracum as indicated by micro-laminations typical of chitin-containing material and characterized by alteration of chitinous and carbonate laminas similar to those in cuttlebones of Recent Sepia.
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| 3. |
- Van Konijnenburg-van Cittert, JHA, et al.
(författare)
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A Selaginellites from the Rhaetian of Wüstenwelsberg (Upper Franconia, Germany)
- 2014
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Ingår i: Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen. - E. Schweizerbart’sche Verlagsbuchhandlung, Stuttgart : Schweizerbart. - 0077-7749. ; 272, s. 115-127
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Tidskriftsartikel (refereegranskat)abstract
- Sterile shoots and a microsporangiate strobilus of a new herbaceous lycophyte, Selaginellites coburgensis nov. spec., are described from the Rhaetian (uppermost Triassic) of Wüstenwelsberg near Coburg, Germany. Shoots branch dichotomously and bear two lateral rows of larger and two median rows of smaller microphylls. Sporophylls are scale-like; sporangia contain Uvaesporites-type spores, which permit a direct comparison of macrofossil evidence with the dispersed spore record. Sellaginellites coburgensis is significant because lycophyte macrofossils are exceedingly rare in the Rhaeto-Liassic of Franconia. The plant probably grew in habitats that were shady and relatively humid, perhaps within dense vegetation and/or in close proximity to bodies of water that locally provided a favourable microclimate.
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| 4. |
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| 5. |
- Doguzhaeva, Larisa, et al.
(författare)
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The embryonic conch structure as a supposed imperative factor on the hatchling dispersal and geographical expansion of belemnites: an example of Callovian (Middle Jurassic) pachybelemnopseins from Aragόn (NE Spain) : -
- 2017
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Ingår i: Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. - Germany, Stuttgart : E. Schweizerbart'sche Verlagsbuchhandlung. - 0077-7749 .- 2363-717X. ; 283:3, s. 317-334
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Tidskriftsartikel (refereegranskat)abstract
- Scanning electron microscopy, energy dispersive spectrometry and taphonomic analysis are applied for studying of about 250 shells of the pachybelemnopsein belemnites Hibolithes and Pachybelemnopsis. They are abundantly exposed on solid carbonate bedding surfaces of the middle-late Callovian deposits in the vicinity of the village Ricla, Iberian Range, Aragón, NE Spain. The evidences of their autochthonous burial are as follows: (i) high occurrence of very small, small, and medium-size specimens; the maximum diameter of the rostrum in each category is 2-3 mm, 3-6 mm, 6-10 mm, respectively, whereas large specimens are rare; (ii) small and medium-size shells are dispersed or grouped in small accumulations comprising 3-10 specimens lacking a common orientation or size selection; large shells are disperse; (iii) the apical part of the phragmocones commonly retains fragile embryonic and early post-hatching parts; (iv) the mechanical abrasion is minor; (v) a large number of shells are “hollow belemnites” lacking the diagenetic filling of the protoconch and the apical chambers of the phragmocones. The above set of characters illuminates a high mortality of juvenile and immature pachybelemnopsein belemnites as well as their fast in situ burial. This suggests that the adults did not live constantly in a shallow-water environment. The studied belemnites support a viewpoint on the adaptation of the embryonic conch of the belemnites for a nekto-pelagic lifestyle of the hatchlings. This may provide their effective dispersal and growing expansion from the late Early Jurassic onwards.
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| 6. |
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| 7. |
- Liu, Teng, et al.
(författare)
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Soft- tissue anatomy of an orsten- type phosphatocopid crustacean from the cambrian furongian of China revealed by synchrotron radiation x-ray tomographic microscopy
- 2019
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Ingår i: Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen. - : Schweizerbart. - 0077-7749. ; 294:3, s. 263-274
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Tidskriftsartikel (refereegranskat)abstract
- Fossils of Orsten- type preservation represented by Skara and Phosphatocopida have been reported from the Cambrian Furongian of Western Hunan, China. Their taxonomy and external morphology are well known, but their internal soft- tissue anatomy has not been revealed yet. With the application of synchrotron radiation X-ray tomographic microscopy, here we describe the internal soft- tissue anatomy of an Orsten- type preserved phosphatocopid crustacean assigned to Hesslandona angustata. The internal organs and tissues of this specimen were collapsed after death to form a visceral mass situated within the labrum and underneath the sternal cuticle. The visceral mass contains the digestive system, including digestive tract and possible digestive glands. The digestive tract starts from the mouth, followed by oesophagus (foregut) and midgut, whereas the hind gut and anus are unknown due to incomplete preservation. Two bilaterally symmetric knob- like structures beside the midgut may be digestive glands (midgut diverticula). The visceral mass also contains other structures that may be related to nerve tissues and/or muscles, but identification as specific organs or tissues is uncertain.
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| 8. |
- Pott, Christian, et al.
(författare)
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New data on Selaginellites coburgensis from the Rhaetian of Wüstenwelsberg (Upper Franconia, Germany).
- 2016
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Ingår i: Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen. - Stuttgart : E. Schweizerbart'sche Verlagsbuchhandlung. - 0077-7749. ; 280, s. 177-181
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Tidskriftsartikel (refereegranskat)abstract
- A branched shoot with several attached microsporangiate strobili of the Rhaetian (late Triassic) herbaceous lycophyte Selaginellites coburgensis is described from Wüstenwelsberg near Coburg, Germany, the locus typicus of the species. The strobili all contain Uvaesporites-type microspores, precisely as the single, detached strobilus fragment found in association with one of the original specimens
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| 9. |
- Pott, Christian, et al.
(författare)
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Taeniopteris novomundensis sp. nov. — "cycadophyte" foliage from the Carnian of Switzerland and Svalbard reconsidered: How to use Taeniopteris?
- 2015
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Ingår i: Neues Jahrbuch für Geologie und Palaontologie - Abhandlungen. - Stuttgart : Schweizerbart. - 0077-7749. ; 275:1, s. 19-31
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Tidskriftsartikel (refereegranskat)abstract
- Recent findings of Taeniopteris-like foliage from the Carnian of Hopen, Svalbard, necessitated the re-evaluation of entire-margined Taeniopteris foliage from the Carnian flora of Neuewelt, Basel, Switzerland, revealing the illegitimate status of Taeniopteris angustifolia. The specimen from the Ladinian or Carnian (Lower Keuper) of Lower Franconia, Germany, on which the identification was based, was recently identified as the holotype of the marattialean fern Danaeopsis angustifolia, of which Taeniopteris angustifolia is the basionym. This implies that the Neuewelt specimens, which are different from the specimens from Franconia, lack any type and basionym, and a new species name is required. The specimens from Hopen as well as specimens elsewhere from Svalbard are identified as conspecific with the specimens from Neuewelt, and we here assign all specimens to Taeniopteris novomundensis sp. nov., which is thus known from the Carnian of Switzerland and Svalbard. Information on epidermal anatomy is not available, and the affinity of the species can, therefore, not be elucidated further, but is here interpreted as a cycadophyte. Several specimens from the Carnian of Franconia assigned to Taeniopteris angustifolia belong to a species different from Taeniopteris novomundensis, i.e. Taeniopteris kelberi. Earlier inclusion of some of the specimens now assigned to Taeniopteris novomundensis in Taeniopteris kelberi is unsupported. The typification and use of Taeniopteris are discussed in this framework.
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| 10. |
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