- 2
Report Fossil
Images: |
By oilshale
Horseshoe crab
Kingdom: ANIMALIA
Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Late
International Age: Tithonian (late)
Weissjura Group
Altmühltal Formation
Acquired by: Purchase/Trade
Length: 18 cm
Solnhofen, Untere Haardt
Eichstätt
Bavaria
Germany
Mesolimulus walchi in dorsal preservation with (poorly) retained "death trace".
Taxonomy from Russel et al. 2021.
Russel et al. 2021, p. 6: "Emended diagnosis. Prosoma semi-circular, genal spines without indentations that terminate at a first fifth of thoracetron. Cardiac lobe cone-shaped with crenulated margins and cardiac ridge. Ophthalmic ridges present and do not curve towards lateral prosomal margins. Posterior prosomal rim pronounced and lacks beads along margin. Occipital bands present and pronounced. Thoracetron trapezoidal and has pronounced flange. Lateral margin ridges absent. Moveable spine notches present and pronounced. Moveable spines long. Medial lobe triangular, has ridge and spines on ridge. Terminal thoracetronic spines medium sized and posterolaterally directed. Telson embayment strongly concave. Telson keeled. “
References:
Russell D. C. Bicknell; Błażej Błażejowski; Oliver Wings; Tomaž Hitij; Mark L. Botton (2021). Critical re‐evaluation of Limulidae uncovers limited Limulus diversity. Papers in Palaeontology, pp. 1-32. doi:10.1002/spp2.1352
D. R. Lomax & Ch. A. Racay (2012). A Long Mortichnial Trackway of Mesolimulus walchi from the Upper Jurassic Solnhofen Lithographic Limestone near Wintershof, Germany. ICHNOS - International Journal for Plant and Animal Traces 01/2012; 19(3):175-183. DOI:10.1080/10420940.2012.702704
J. C. Lamsdell (2016). Horseshoe crab phylogeny and independent colonizations of fresh water: Ecological invasion as a driver for morphological innovation - Palaeontology (59), 181-194.
There are no comments to display.
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now