Paleoovoidus bifurcatus Sarzetti, Labandeira, Muzon , Wilf, Cuneo , Johnson & Genise, 2009

Petrulevicius, Julian F., Wappler, Torsten, Nel, Andre & Rust, Jes, 2011, The diversity of Odonata and their endophytic ovipositions from the Upper Oligocene Fossillagerstaette of Rott (Rhineland, Germany), ZooKeys 130, pp. 67-89 : 76-77

Paleoovoidus bifurcatus Sarzetti, Labandeira, Muzon, Wilf, Cuneo, Johnson & Genise, 2009 Fig. 23

* Paleoovoidus bifurcatus Sarzetti et al., 2009, p. 438, figs 2.1, 2.2.

"Galle Aceria nervesqua fagina " Straus, 1977, p. 74, fig. 2, p. 78, fig. 50.

"Oviposition damage on primary and secondary veins ("Doppelreihen Modus “)“ Hellmund, 1988, p. 323.

“Lestiden-Typ“ Hellmund and Hellmund, 1991, p. 4-5 figs 1.1-1.3, 2; Hellmund and Hellmund, 1996a, p. 58, fig. 6.1 a–b; Hellmund and Hellmund, 1996b, p. 165, fig. 16; Hellmund and Hellmund, 2002a, p. 3, fig. 2; Hellmund and Hellmund, 2002b, p. 49, figs 2-3, p. 53, fig. 12.

"Oviposition damage on secondary veins" Labandeira et al., 2007, p. 10.

Diagnosis

(taken from Sarzetti et al. 2009: 438). Elongate to lens-shaped scars arranged in pairs along both sides of a primary vein, forming double rows and sometimes a V-shaped configuration, with the arms of the V parallel to secondary veins and the vertex embedded in the midvein.

Description.

The oviposition scars are preserved on a nearly complete preserved lanceolate leaf. Base acute and slightly asymmetric. Venation imperfect basal acro dromous.Midrib moderately thick and straight. Besides the pair of stout secondary veins arising at the base, secondary and tertiary veins form a fine network. The ovoid or ellipsoidal-shaped oviposition scars occur in pairs along the midrib and oriented at a right angle with respect to the vein in the upper part of the leaf. Main cluster occurs on the secondary vein, whereas the occurrence of endophytic oviposition scars on the midrib vein is more scattered. The total amount of scars is 25. The axial length of the scars ranges from 0.5 mm to 0.8 mm, and their width ranges from 0.3 mm to 0.4 mm. The distances between consecutive scars are variable within the range of 0.5 mm to 0.7 mm.

Comments.

The specimen of Paleoovoidus bifurcatus (HW_Ro_58.2, on Zizyphus zizyphoides [ Rhamnaceae ]) derives from the pelite and lignite facies of the ‘Hangendschichten’ at the Rott locality. The sediments belong to the younger part of the Upper Oligocene (Chattian), based on the mammal assemblage (MP30) recorded by Mörs (1995) with an age of approximately 25 million years as accepted for the Rott Formation (von Koenigswald et al. 1996). The pattern was originally mentioned by ( Hellmund (1986, 1987, 1988) and originally described and figured by Hellmund and Hellmund (1991, figs 1-2) but without any ichnotaxonomic analyses. A new ichnospecies, Paleoovoidus bifurcatus , was described by Sarzetti et al. (2009) from the early Eocene Laguna del Hunco floras of Patagonia. Accordingly, the ichnotaxonomic status of the ichnogenus Paleoovoidus was reviewed, providing a new ichnotaxonomic classification, indicating that the preservation of Paleoovoidus bifurcatus is variable across a broad range of compression/impression floras and host plants. The presense of Paleoovoidus bifurcatus on the Buckthorn family ( Rhamnaceae ) at Rott extending its host plant range. Previously, the ichnogenus show a marked preference for lauraceous leaves of the morphogenus Daphnogene cinnamomifolia ( Hellmund and Hellmund 1991, 1996a, b).