標(biāo)題: Titlebook: Cephalopods Present and Past: New Insights and Fresh Perspectives; Neil H. Landman,Richard Arnold Davis,Royal H. Mape Book 2007 Springer S [打印本頁(yè)] 作者: Addiction 時(shí)間: 2025-3-21 19:58
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書(shū)目名稱Cephalopods Present and Past: New Insights and Fresh Perspectives讀者反饋學(xué)科排名
作者: 鍵琴 時(shí)間: 2025-3-21 23:34 作者: 怎樣才咆哮 時(shí)間: 2025-3-22 02:07 作者: FRONT 時(shí)間: 2025-3-22 06:12 作者: 舊病復(fù)發(fā) 時(shí)間: 2025-3-22 11:12
Deformities in the Late Callovian (Late Middle Jurassic) Ammonite Fauna from Saratov, Russia stage of life when that injury happened can, at times, be interpreted and diagnosed. If an ammonite did not survive the attack, its shell commonly exhibits holes or missing portions. If most of the ammonite was consumed, only parts, pieces, or fragments of the shell will be found.作者: Jocose 時(shí)間: 2025-3-22 14:05 作者: Jocose 時(shí)間: 2025-3-22 19:23 作者: 格子架 時(shí)間: 2025-3-22 23:28 作者: 使尷尬 時(shí)間: 2025-3-23 02:32
https://doi.org/10.1007/978-3-658-03636-2a). Observation of his described and illustrated specimens and especially a detailed analysis of previously unstudied specimens from this locality has provided new insight into the preservation of ammonoids.作者: 沉默 時(shí)間: 2025-3-23 08:34 作者: 方舟 時(shí)間: 2025-3-23 13:43 作者: entail 時(shí)間: 2025-3-23 14:33
Ornamental Polymorphism in Placenticeras kaffrarium (Ammonoidea; Upper Cretaceous of India): Evolutithe presentday organic world this term is used in reference to colonial organisms such as bryozoans and cnidarians and castes in bees, ants, and wasps. Recognition of polymorphism requires study of large populations of the organism in question. That is why it is frequently observed in the living organic world but is rarely recorded in fossils.作者: 起皺紋 時(shí)間: 2025-3-23 19:21
Book 2007ine ecos- tems throughout the world and comprise approximately 900 species. They also have an extraordinary fossil record, extending back to the Cambrian Period, with as many as 10,000 extinct species. Throughout their long history, they have experienced sp- tacular radiations and near-total extinct作者: granite 時(shí)間: 2025-3-24 01:29 作者: 無(wú)法解釋 時(shí)間: 2025-3-24 05:32
Einleitung und Erkenntnisinteresse,Muscle attachment scars (the dorsal and ventral scars) were listed as “unpublished observations” by Doguzhaeva and Mutvei (1996: 54), but, as far as we know, they never published these “observations” in greater detail.作者: jet-lag 時(shí)間: 2025-3-24 10:11
https://doi.org/10.1007/978-3-658-03636-2tatic pressure (siphuncular strength index) from the siphuncular wall thickness, multiplied by 100 and divided by the siphuncle inner radius. This index was thought to indicate the maximum water depth where ammonoid shell imploded and, hence, the maximum habitat depth of the animal.作者: Frenetic 時(shí)間: 2025-3-24 14:01 作者: 笨拙的我 時(shí)間: 2025-3-24 18:20
https://doi.org/10.1007/978-3-658-03734-5e body chamber inherited from ectocochlean ancestors (Crick, 1896; Naef, 1922; Jeletzky, 1966; Doyle and Shakides, 2004). Rostral layers (primordial rostrum + rostrum) and the mural parts of the septa do not belong to the conotheca proper.作者: angina-pectoris 時(shí)間: 2025-3-24 22:02
Patterns of Embryonic Development in Early to Middle Devonian Ammonoidsiction (Landman et al., 1996; Klofak et al., 1999). Internally, the siphuncle originates in the initial chamber as a rounded caecum and is attached to the shell wall by a prosiphon (Landman, 1988: Figs. 1, 2 and Klofak et al., 1999: Figs. 1, 2).作者: 容易懂得 時(shí)間: 2025-3-25 00:48
Soft-tissue Attachment of Middle Triassic Ceratitida from GermanyMuscle attachment scars (the dorsal and ventral scars) were listed as “unpublished observations” by Doguzhaeva and Mutvei (1996: 54), but, as far as we know, they never published these “observations” in greater detail.作者: SOW 時(shí)間: 2025-3-25 03:25 作者: Override 時(shí)間: 2025-3-25 11:31 作者: GUMP 時(shí)間: 2025-3-25 12:03
Ultrastructural Analyses on the Conotheca of the Genus Belemnotheutis (Belemnitida: Coleoidea)e body chamber inherited from ectocochlean ancestors (Crick, 1896; Naef, 1922; Jeletzky, 1966; Doyle and Shakides, 2004). Rostral layers (primordial rostrum + rostrum) and the mural parts of the septa do not belong to the conotheca proper.作者: bibliophile 時(shí)間: 2025-3-25 18:43 作者: 財(cái)主 時(shí)間: 2025-3-25 21:45 作者: Fibrillation 時(shí)間: 2025-3-26 03:04 作者: 相信 時(shí)間: 2025-3-26 07:07 作者: BILE 時(shí)間: 2025-3-26 09:06 作者: CRUE 時(shí)間: 2025-3-26 16:03
https://doi.org/10.1007/978-3-658-02878-7cal pattern: the so-called Linnaean classification. This taxonomic activity is vital, ensuring a large corpus of knowledge of past life across geological times. By-products are: the study of biodiversity through time, the discovery of some extraordinary events such as mass extinctions and major radi作者: PSA-velocity 時(shí)間: 2025-3-26 17:09 作者: Cursory 時(shí)間: 2025-3-26 21:45 作者: Ointment 時(shí)間: 2025-3-27 01:26
https://doi.org/10.1007/978-3-658-03045-2emeinschaft) had to be convinced that a powerful database was one of the prerequisites for such a research program. It was finally accepted that finding out the requirements of paleontological databases for research on systematics and evolution was pioneering work.作者: Malaise 時(shí)間: 2025-3-27 09:21
https://doi.org/10.1007/978-3-658-03045-2ia (1984: 1364), genetic polymorphism is “A form of genetic variation, specifically a discontinuous variation, occurring within plant and animal species in which distinct forms exist together in the same population. …Distinct forms must be controlled by some switch which can produce one form or the 作者: 機(jī)制 時(shí)間: 2025-3-27 10:19 作者: 初學(xué)者 時(shí)間: 2025-3-27 15:33
https://doi.org/10.1007/978-3-658-03354-5e at the tip of the mantle, an oegopsid eye, and a greatly reduced radula (Nixon and Young, 2003). The external structure of the early . shell starting from a spherical initial chamber resembles very much that of Ammonoidea, indeed more than that of Belemnoidea (Bandel and Boletzky, 1979; Bandel, 19作者: 加花粗鄙人 時(shí)間: 2025-3-27 18:57
Christiane Schiersmann,Heinz-Ulrich Thielnotable lack of innovation in external shell geometry over the same time period (Saunders et al., 2004). It has long been recognized that the complexity of these septa generally increases through time, and that trend has been well documented using the suture formed by the intersection of the interna作者: 代替 時(shí)間: 2025-3-28 01:59 作者: Feedback 時(shí)間: 2025-3-28 03:45
Einleitung und Erkenntnisinteresse,ance, bivalves often display the sites where the adductors and the pallium were attached (e.g., Klug et al., 2005). For the nautiloid ., Klug and Lehmkuhl (2004) documented the attachment scars of the cephalic retractors which sometimes are preserved in great detail. Although representatives of the 作者: 不透明性 時(shí)間: 2025-3-28 09:13
https://doi.org/10.1007/978-3-658-03636-2e reported to the paleontological community. Such an association was reported by Trauth (1935b), who described and illustrated mandibles associated with the Late Triassic ceratitid ammonoid .. The specimens were discovered from the Carnian beds in the northern Calcareous Alps near Lunz (Lower Austri作者: 武器 時(shí)間: 2025-3-28 14:00 作者: OVER 時(shí)間: 2025-3-28 16:39 作者: hardheaded 時(shí)間: 2025-3-28 20:29
https://doi.org/10.1007/978-3-658-03734-5gmocone and acts as a counterweight that brings the animal into a horizontal swimming position. Structural elements of the phragmocone are the septal-siphonal complex and the conotheca (phragmocone wall). If the proostracum (Fig. 14.1), the anterior dorsal projection of the phragmocone, is also part作者: muster 時(shí)間: 2025-3-28 23:10
https://doi.org/10.1007/978-3-658-04012-3ases, epizoa, and diet all left evidence in the shell as scars, blisters, disfigurations, holes, nicks, crushing, attachments, and abnormalities, along with slow, rapid, stunted, or enlarged growth. If an ammonite survived bites due to predation, its shell documented the damage. Often, the cause and作者: LAVE 時(shí)間: 2025-3-29 06:06 作者: 遵循的規(guī)范 時(shí)間: 2025-3-29 10:10 作者: 武器 時(shí)間: 2025-3-29 15:26 作者: 土坯 時(shí)間: 2025-3-29 19:19 作者: grenade 時(shí)間: 2025-3-29 21:34
Neil H. Landman,Richard Arnold Davis,Royal H. MapeThe book is a remarkable treatment of both fossil and living forms of cephalopods, with the aim of presenting the wide diversity..Highlights include new evidence for the existence of an ink sac in fos作者: 緩和 時(shí)間: 2025-3-30 00:08 作者: abnegate 時(shí)間: 2025-3-30 04:04 作者: heartburn 時(shí)間: 2025-3-30 08:24
New Data on the Clymeniid Faunas of the Urals and KazakhstanThe clymeniid faunas of the Urals and Kazakhstan are renowned for their diversity and abundance. Thousands of excellently preserved shells represent all known families and most genera. Ammonoids are mostly found in carbonate units containing almost exclusively cephalopods and conodonts with very little or no benthic fauna.作者: SEEK 時(shí)間: 2025-3-30 15:48
