| Live plesiosaurs: weighing the evidence - Journal of Creation (TJ) |
|
|
Live plesiosaurs: weighing the evidenceSummaryThe wealth of fossilized plesiosaur skeletons testify that these creatures roamed the waters of the past. Recent finds of plesiosaur-like carcasses, on the other hand, have been controversial. Of all plesiosaur-like creatures washed up on shores around the world, basking sharks account for over 90%. The conclusion of the Japanese study published in 1978 on the 1977 Zuiyo-maru carcass trawled off the New Zealand coast, clearly supports identification as a shark. There is evidence, however, for live plesiosaurs in recent times. IntroductionFrom its find in 1977, the Zuiyo-maru carcass has been the source of controversy. A thorough Japanese report was published in 1978, but confusion about the observations and conclusion of this study still remains today. This is evident from the varied opinions in the many books1–6 articles and reviews,7–10 and letters to editors11–15 relating this find. Controversies surrounding sea creature finds, and more specifically plesiosaur-related ones, are nothing new, however, as they have raged long before the famous Japanese find (see below). I believe this article is needed to help sort out the confusion in creationist circles concerning the validity of plesiosaur finds, especially the 1977 carcass, as most have not had the opportunity (as I had not) to study all the relevant information systematically. In this article I will provide some pertinent background information, a summary on the most salient points from the published study in 1978, followed by a few independent conclusions from the available data, and then finally my conclusion to the whole issue. Plesiosaur evidence
Figure 1. Artistic representation of Cryptoclidus. The past existence of plesiosaurs is evident from the wealth of fossilized skeletal remains unearthed worldwide. From the skeletons and from our knowledge of structure and function of various body types from presently living animals, these creatures have been reconstructed, to give us an idea of their appearance and how they may have lived. Plesiosaurs were marine dwelling reptiles, and based on skeletons found to date they ranged in size from more than 2 meters (7 feet) for Plesiosaurus to about 14 meters (46 feet) for Elasmosaurus.16, 17 The order Plesiosauria has been divided into two Superfamilies16: Plesiosauroidea, such as Cryptoclidus (sometimes spelt Cryptocleidus, Figures 1, 2b), characterized by long necks, with 28–71 vertebrae, and small heads, and Pliosauroidea, whose members had large heads and short necks with as few as 13 vertebrae. A huge pliosaur was Kronosaurus (Fig. 2a), whose skull alone was 2.4 meters (8 feet) long. Plesiosaurs possessed deep bodies and flipper-like limbs unique among marine reptiles, ending in phalanges consisting of five to ten bones (see Figure 1, 2b). The flippers, shaped like hydrofoils, were moved in large vertical strokes enabling the ‘subaqueous flight’ swimming style similar to sea turtles and penguins. The bones of the pectoral and pelvic girdles formed broad plates on the underside of the body to where the limbs and powerful swimming muscles were attached. A number of dense ventral, costa-like ribs connected the two plates, providing a strong, rigid base for the movement of the flippers (Figure 2a). It is also believed that plesiosaurs crawled on to beaches to lay their eggs in a similar manner to turtles, the rigid base providing the necessary support and protection.16,17 According to evolutionary dating methods they are believed to have lived in the Mesozoic Era, approximately 230–65 million years ago. According to Dixon et al.,16 ‘Plesiosaurs seem to have changed little during their 135 million years of evolution. The earliest member of the group, Plesiosaurus, had already developed all the main structural features that characterize these marine reptiles … The pliosaurs first appeared in the Early Jurassic, alongside their ancestors, the plesiosauroids.’ So it appears that the fossil record supports creation of the plesiosaur type and variation within the kind. In Genesis 1:20–23, however, we read that plesiosaurs were created with the rest of the sea creatures on Day 5 of Creation Week:
Figure 2. Gross morphology and alignment. Documented history of sea carcassesBut are plesiosaurs alive today, or did they become extinct? Many cases of ‘sea creatures’ being washed up on seashores are documented around the world. In a lot of these instances the media hype, preconceived ideas and people’s fascination with monsters have coloured the rational interpretation of the carcasses. One of the earliest reports regards the carcass of a sea animal with a long neck washed ashore at Stronsay Island in the Orkneys, Scotland. Eyewitnesses described the creature as having 6 legs and a mane covering the body. It became known as the ‘Stronsay beast.’ Fortunately, some pieces of the animal were kept, including the skull and a number of vertebrae. In 1933, upon study of the vertebrae, it was clear that they were from a shark. The vertebrae are held at the Royal Museum of Scotland. A sketch by the eyewitness, illustrating the cranium, vertebrae and pelvic skeleton, also confirm that it was the remains of a shark.18 Many additional documented cases of plesiosaur-like creatures have received a lot of media attention, and apparently basking sharks account for over 90% of all such reported sea serpents.19 Some of the cases which have been positively identified as a shark, and most probably a basking shark are:5
Other cases where the description fits that of a basking shark:21,22
Basking SharksThe basking shark, Cetorhinus maximus is only second in size to the whale shark. Individuals have been known to reach up to more than 13.7 meters (45 feet) long.23 The gill arches are very large, extending around the neck and almost meeting at the throat. The fifth pair of gill arches is just in front of the pectoral fins (Figure 2b). Basking sharks sometimes swim on the surface of the water with mouth wide open, filtering out plankton, or more often just sun themselves on the surface with the dorsal fins towering out of the water. They are also known to congregate in loose schools and to swim one behind the other, which could give the appearance of a ‘sea serpent.’ When the shark decays, the tissue around the gills breaks apart, so the gills and the lower jaw fall off. This leaves the spinal column and the cranium to resemble a long neck and a small head (Figure 2c). As the bottom of the tail fin has no spinal column, it also decays leaving the appearance of a long tail. Finally the skin sloughs away and the muscles fray out resulting in what resembles a hairy mane. Carcasses have a distinctive plesiosaur appearance, and have been termed ‘pseudoplesiosaurs.’24 The pair of claspers (copulatory appendages) of male sharks may give the appearance of an extra pair of limbs, like that reported for the ‘Stronsay beast’ find. However, when further decayed, they partly merge with the closely associated pelvic fins, making the fins appear larger (see Figure 2c).
Figure 3. Photographs taken by Michihiko Yano on 25 April 1977. The Zuiyo-maru carcassOn April 25, 1977, a carcass was netted off the coast of New Zealand, about 30 miles east of Christchurch, by the Japanese trawler Zuiyo-maru.25 It weighed a hefty 4000 pounds and was 10 meters (33 feet) long. Michiko Yano, the assistant production manager aboard the Zuiyo-maru took five photographs of the carcass and some measurements, and removed forty-two pieces of horny fibre from one of the anterior fins (see Figures 3a, 3b and 3c).26 The fibres were washed to remove the putrid smell, treated with antiseptic solution containing 0.04% sodium hypochlorite (NaClO) for 12 hours, and allowed to air dry.27 A sketch of the carcass was later made ‘based solely on Yano’s imagination’28 after it had been thrown away, but it conflicted with Yano’s original measurements (see Figure 2d). The bone shown in the appendages was determined merely by kicking them and standing on them.28 Yano’s photographs and his misleading sketch were presented by the Taiyo Fishery at a press interview. Great media hype erupted about the find,
In the Asahi Shimbun newspaper Professor Yoshinori Imaizumi of Japan’s National Science Museum was quoted as stating,
The plesiosaur stampIn November 1997, a stamp (the well–known plesiosaur stamp) was issued commemorating the centenary of the Tokyo National Science Museum (see Figure 4). This stamp has also been a source of confusion and speculation. Some have used it as proof for the find being a plesiosaur,2,7 while others are convinced that the stamp had nothing to do with the creature,9,11,26 or that the carcass may have had some influence on the plesiosaur choice for the stamp.15 The plesiosaur was probably a general reconstruction modeled by the museum.29
It is difficult, though, to escape the feeling that a combination of media hype, the view held by some in the scientific community based on Yano’s misleading sketch, and the lack of a thorough analysis of the evidence (an ambiguous interim report was given on July 25 based on chemical analysis of the horny fibre), strongly influenced the design of the stamp. The scientific reportIn order to settle the reigning confusion concerning the true identity of the monster, Dr Tadayoshi Sasaki, president of Tokyo University of Fisheries, arranged for a group of scientists from various fields to carry out a thorough investigation of the available evidence. Their results were published in January 1978 by La Société Franco–Japonaise d’Océanographie as a collection of nine papers.25 The majority of the findings clearly indicated that the carcass was a decaying basking shark. Below are the most important observations from each study (some shared observations are only mentioned under one research group). Obata and Tomoda:30
Figure 5. Interpretative sketch of rear view of the carcass in Figure 3c. A. Dorsal fin. B. Right pectoral fin. C. Mycomata. D. Cranium. (adapted from Omura et al.21). Omura et al:21
Hasegawa and Uyeno:31
Kimura et al: 32
Abe:33
Shark inconsistenciesA few supposed inconsistencies with the shark identification were also noted.28 These, however, have easily been accounted for. The major ones are discussed here.
Summary of scientific findings on Zuiyo-maru carcassThe conclusion of the research teams can be summarized with the quote, ‘General opinion favours identification as a shark. A possible method to approach a more accurate identification may be to focus on the basking shark.’38
Figure 6. Basking shark carcass found on beach south of Kaikoura, NZ. At the beginning of September 1977, less then two months after the Zuiyo-maru capture story was released to the press, a 5-meter (16 feet) carcass was found stranded at Nemuro, Hokkaido. More decomposed than the Zuiyo-maru carcass, it had lost most of the muscles, and the vertebrae were clearly exposed. The gill-arches and the lower jaw were also missing leaving a turtle-like cranium. The vertebral column was complete and the pectoral and pelvic fins were still attached, but their apices were damaged. This carcass, however, was accepted as belonging to a basking shark.38 It is clear that if the scientific report had first been published and widely documented prior to the release of the photographs and Yano’s misleading sketch of the creature, more sanity would have prevailed at the time, even in scientific circles. And there would also be less controversy today. Another pseudoplesiosaur from New ZealandIn August 1996 Mrs Bev Elliott, of Kaikoura, New Zealand, found a carcass on the beach south of Kaikoura (see Figure 6). Mrs Elliott, a Seacare member responsible for a 20 kilometer (12 mile) stretch of beach, who had ardently believed that the Zuiyo-maru carcass was a plesiosaur, was initially thrilled to find her own dead plesiosaur. But on closer examination of the carcass it was clear that it was a basking shark.39 The carcass was 18 paces long (approximately 10 meters (33 feet)), had a thin neck and tail, and a small head, but no fins, as a result of its late stage of decomposition. When she compared the carcass with that from Yano (see Figures 3a and 3b) she noted,
Her Seacare leader also related that a basking shark had recently been caught in a net by local fishermen and the skeleton was cartilage and not bone. Was this the carcass that Bev found? Live plesiosaurs today?
Figure 7. Painting of the plesiosaur-like creature, ‘Yarru,’ by the Kuku Yalanji tribespeople of far North Queensland, Australia. There are many stories and legends of dragons, with descriptions fitting dinosaurs, supporting that man and dinosaur did in fact live together (supporting also a young age for earth).7 Australian Aboriginal folklore abounds with such stories,42 including references to plesiosaur-like creatures. Elders of the Kuku Yalanji Aboriginal tribe of Far North Queensland, Australia, relate stories of Yarru (or Yarrba), a creature which used to inhabit rainforest waterholes.43 The painting in Figure 7 depicts a creature with features remarkably similar to a plesiosaur (compare with Figures 1 and 2a). It even shows an outline of the gastro-intestinal tract, indicating that these animals had been hunted and butchered. A picture of a plesiosaur, dubbed the Bynoe Harbour Monster, appeared recently in a Darwin newspaper after occasional sightings by fishermen. A Christian Anyuna native from the Northern Territory familiar with many of his tribe’s songs, or ‘kudjika,’ after seeing the picture in the newspaper realized that one of these kudjikas described the neck, limbs and body of a plesiosaur.44 It would not surprise me at all if a live plesiosaur was found today. ConclusionThe theistic evolutionist and anti-creationist Kuban has extensively reviewed the Zuiyo-maru find.41 In one of his statements, however, he shows the fallacy of evolutionary thinking, ‘However, even if a living plesiosaur were confirmed, it would not threaten the theory of evolution. After all, many other animal groups represented by modern species co-existed with the dinosaurs in the Mesozoic Era … but some creatures, such as the Coelacanth and Tautara [sic], were once thought to have been extinct for tens of millions of years, only to be later found alive and little changed in modern times. These cases emphasize the incompleteness of the fossil record and the remarkable stasis of some animal groups, but are not grounds for upheavals in evolutionary thought.’ The fossil record is indeed incomplete, but this really means that it lacks the countless transitional forms that Darwin predicted. But a thorough investigation of fossils clearly demonstrates that evolutionary metamorphosis from one animal type to another has not occurred. Instead of many transitional stages, there is only a handful of debatable ones. Many fossilized insects and animal fossils are identical to those living today. When sin entered the world death followed, and a perfectly balanced ecosystem, based mainly on a vegetarian subsistence was destroyed. As seen today, animal and plant species are constantly dying out and there is an escalating number in the ‘endangered species’ list. The finding of a live plesiosaur would certainly be another evolutionary headache. God has already revealed fauna and flora that were believed extinct, confounding evolutionary-atheistic thinking. We may all hope to find a live plesiosaur, and there is some evidence to support that these creatures roamed the waters in recent times (see below). But to ground our belief on spurious finds such as the Zuiyo-maru carcass, choosing to ignore the weight of evidence for decomposing sharks, is great folly. God gives unequivocal evidence in His chosen time, as is seen with the finding of live Coelacanths, Tuatara, etc. We are not ‘helping’ God and the Gospel of Jesus Christ if we are seen by unbelievers to hold on to unfounded claims ‘ … be ye therefore wise as serpents, and harmless as doves’ (Matthew 10:16). ReferencesNote: CPC refers to Collected Papers on the Carcass of an Unidentified Animal trawled off New Zealand by the Zuyo-maru, Edited by T. Sasaki, La Société Franco–Japonaise d’Océanographie, Tokyo, pp. 45–83, 1978.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||



