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MARINE CEPHALOPOD FOSSIL EMBRYOS sellected items

links to pictures at page 4 links para as imagens na pág.4

PENICHE FOSSIL related TEXT http://penichefossil.net http://rcfilms.dotster.com/arribas-abalo-squid-embryos.pdf

squids lulas >>> 1 versus choco cuttle-fish 1 versus front choco cuttle-fish 1 versus squid 1 detail squid

< 4 cm > < squids lulas >>>

2 versus 2 reversus 3 versus 3 reversus 3 reversus detail << > < 10,5 cm > 3,5 cm

4 versus 4 versus detai 4 reversus 4 reversus detail < 5,8 cm > 5 versus 5 versus detail 5 reversus 5 reversus detail

eggs ovas

< > 4 cm

NOTE 1

NOTE 1

In the absence of distinctive traits, the morphology of pebbles does not often allow one to decide whether certain are embryos or eggs. The images above appear to display the presence of such traits. Conclusive decision may require more detailed analyses in different cases.

Na ausência de traços distintivos, a morfologia dos seixos nem sempre permite concluir se são embriões ou ovos. As imagens acima muito provavelmente revelam a presença desses traços. Em casos diferentes, conclusões decisivas poderão exigir uma análise mais apurada.

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6 versus 6 reversus 6 base 6 base detail < > 4,7 cm EMBRYOS OF SMALLER SIZE and DIFFERENT COULOUR embriões de cor e tamanho diferentes 7 versus 7 reversus 8 versus 8 reversus 3,5 cm

< > 6,5 cm 9 versus 9 reversus 10 versus 10 reversus < > < > > 5,7 cm 5,8 cm 11 versus 11 reversus 11 reversus detail < 6.7 cm > arms braços syphon sifão eye olho ? syphon sifão fold dobra

NOTE 2

A few pebbles have been broken, probably when they were still soft-bodied. In this case, the crack section is a clear evidence of the anatomy of a fossil squid, similar to that of a modern one (REF. : figure 5, The Development Of The Squid, by W. K. Brooks, Boston, The Boston Society of Natural History, 1880).

Alguns seixos aparecem quebrados. A quebra talvez tenha ocorrido quando ainda eram de corpo mole. Neste caso, a respetiva secção revela com toda a evidência a anatomia de uma lula fóssil, semelhante à de um exemplar vivo (REF. : figura 5, O Desenvolvimento da Lula, de W. K. Brooks, Boston, The Boston Society of Natural History, 1880).

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12 single side grey lado único cinzento 13 single side red lado único vermelho 14 single side multicolour lado único multicor < 5 cm > < 3 cm > < 2,3 cm >

15 niches on sediment 16 niches on soft body 13

REFERENCIES

THE DEVELOPMENT OF THE SQUID http://hermes.mbl.edu/publications/pub_archive/books/Brooks/

FROM THE EGG TO THE OCEAN (video) https://www.youtube.com/watch?v=WvbjnhFIRNU

ILLUSTRATION (A4) http://rcfilms.dotster.com/arribas-abalo-embryos-illustration-150px.jpg

PENICHEFOSSIL http://penichefossil.net

file created on April 15, 2016

NOTE 3

The largest number of embryos found in this local is, by far, relative to specimens not bigger than about 2 cm. A small number has different morphology, as displayed by the pictures above. Certain are probably fossils of infant vertebrates that coexisted with molluscs in the same habitat. The scarce remains of fish we found here strengthen that probability. Many niches of tiny embryos may be seen on the surface of sediments of clay and sand (this is not the case with the location we describe) or on petrified organic matter as the figures below illustrate. In both cases, fresh embryos would have been deformed under the weight of sedimentary masses before petrifying. O maior número de embriões encontrados neste local é, de longe, relativo a espécimenes que não têm mais de 2 cm. Um pequeno número exibe morfologia diferente, como mostram as figuras acima. Alguns são provavelmente fósseis de vertebrados infantes que coexistiram com moluscos no mesmo habitat. Os escassos exemplares de peixes aqui encontrados reforçam essa probabilidade. Vê-se inúmeros nichos de pequenos embriões em sedimentos de areia e argila ou à superfície de matéria orgânica petrificada, tal como mostram as imagens seguintes. Em ambos os casos, os embriões frescos terão sido deformados sob o peso das massas sedimentares antes de petrificarem.

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LINKS CEPHALOPODE 1 versus http://rcfilms.dotster.com/arribas-abalo-cephalopod-embryo.jpg

1 versus front http://rcfilms.dotster.com/arribas-abalo-cephalo-rev.jpg

SQUIDS 1 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-1B-mini.jpg

1 detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-1.jpg

2 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-2-versus.jpg

2 reversus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-2-reversus.jpg

3 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-3-versus.jpg

3 reversus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-3-reversus.jpg

3 reversus detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-3-reversus-detail.jpg

4 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-4-versus.jpg

4 versus detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-4-reversus-detail.jpg

4 reversus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-4-reversus-detail.jpg

4 reversus detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-4-reversus-detail.jpg

5 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-5-versus.jpg

5 versus detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-5-versus-detail.jpg

5 reversus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-5-reversus.jpg

5 reversus detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-5-versus-detail.jpg

6 versus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-6-versus.jpg

6 reversus http://rcfilms.dotster.com/arribas-abalo-squid-embryo-6-reversus.jpg

6 base http://rcfilms.dotster.com/arribas-abalo-squid-embryo-6-section.jpg

6 base detail http://rcfilms.dotster.com/arribas-abalo-squid-embryo-6-section-REF1.jpg

7 versus http://rcfilms.dotster.com/arribas-abalo-embryo-7-versus.jpg

7 reversus http://rcfilms.dotster.com/arribas-abalo-embryo-7-reversus.jpg

8 versus http://rcfilms.dotster.com/arribas-abalo-embryo-8-versus.jpg

8 reversus http://rcfilms.dotster.com/arribas-abalo-embryo-8-reversus.jpg

9 versus http://rcfilms.dotster.com/arribas-abalo-embryo-9-versus.jpg

9 reversus http://rcfilms.dotster.com/arribas-abalo-embryo-9-reversus.jpg

10 versus http://rcfilms.dotster.com/arribas-abalo-embryo-10-versus.jpg

10 reversus http://rcfilms.dotster.com/arribas-abalo-embryo-10-reversus.jpg

11 versus http://rcfilms.dotster.com/arribas-abalo-embryo-11-versus.jpg

11 reversus http://rcfilms.dotster.com/arribas-abalo-embryo-11-reversus.jpg

11 reversus detail http://rcfilms.dotster.com/arribas-abalo-embryo-11-reversus-detail.jpg

12 single side grey http://rcfilms.dotster.com/arribas-abalo-figure-12-embryo-single-side-grey.jpg

13 single side red http://rcfilms.dotster.com/arribas-abalo-figure-13-embryo-single-side-red.jpg

14 single side multicolour http://rcfilms.dotster.com/arribas-abalo-figure-14-embryo-single-side-multicolour.jpg

15 niches on sediment http://rcfilms.dotster.com/arribas-abalo-figure-15-embryo-niches-on-sediment.jpg

16 niches on soft body http://rcfilms.dotster.com/arribas-abalo-figure-16-embryo-niches-on-soft-body.jpg

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