Most of these specimens are isolated wings, but several do preserve other body parts including one specimen from the Sinemurian
of Dorset in which an external haustellum is preserved suggesting that the Necrotauliidae are trichopterans and not stem-Amphiesmenoptera.
For this purpose, the Upper Sinemurian
, Pliensbachian and Lower Toarcian (Lower Jurassic) deposits of the Asturian Basin in northern Spain, including more than 100 m thick succession containing organic-rich and black shale deposits, have been studied.
Latrille C, Elsass F, van Oort F, Denaix L (2001) Physical speciation of trace metals in Fe-Mn concretions from a rendzic lithosol developed on Sinemurian
It was quarried from selected carbonate beds within the Lower Jurassic, Sinemurian
Stage, Coma Formation (Cassinis, 1968).
This formation is one of two comprising the Laberge group of rocks, which are a northwest-trending linear belt of Early Sinemurian
to Late Pliensbachian muddy turbidites, graywackes and conglomerates (Johannson, 1993).
It passes first to blackish limestones of the carbonate shelf (Sinemurian
), then to marls of the shelf-edge or slope facies (Pleinsbachian), and, finally, to basinal turbidites with intercalated hemipelagites (Pleisn-bachian-Toarcian) Santantonio (1993, 2012) described Toarcian extensional tectonics in the Caloveto Group, close to the Longobucco basin.
In the adjacent Betic basins, the Mediterranean affinity is evidenced since the late Sinemurian
up to the early Toarcian (Baeza-Carratola and Garcia Joral, 2012; Baeza-Carratola, 2013).
A total of 30 m were logged (interrupted only by one small inaccessible sector), belonging to the Oxynotum-Raricostatum Zone, Late Sinemurian
(Duarte et al., 2011a, 2012; Duarte and Soares, 2002) (Fig.
(1972) suggest a Sinemurian
to Pliensbachian age for these limestones.
sequence is followed by a thin limestone succession (90 m thick) with subordinate ferruginous marls (Fig.
L1 sequence corresponds to the Anhydrite Zone, and shall correspond to the Hettangian, based on the age of the lower Cuevas Labradas Fm., early Sinemurian
. Buntsandstein has been left outside of this scheme (Lopez-Gomez and Arche 1993).