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Endophytic oviposition and ovipositor position variation in Acanthagrion lancea (Zygoptera, Coenagrionidae) (A) Acanthagrion lancea laying eggs endophytically, folding the abdomen, and varying the ovipositor position. (B) Extant leaf of Eryngium agavifolium (Apeaceae) showing directional change of the egg (black arrows), because of changes in the position of the abdomen and ovipositor of Acanthagrion lancea. Scale: 1mm. (C) Detail of the egg zones. Abbreviation: AZ, apical zone (black); BZ, basal zone.
Source publication
Plant-insect interactions can provide extremely valuable information for reconstructing the oviposition behavior. We have studied about 1350 endophytic egg traces of coenagrionid damselflies (Odonata: Zygoptera) from the Eocene, identifying triangular or drop-shaped scars associated with them. This study aims to determine the origin of these scars....
Contexts in source publication
Context 1
... number of eggs per row, and thus the total length of the curved row of eggs, was limited by the length of the damselfly abdomen, because of space restrictions and/or, apparently, by the presence of areas interpreted as undesirable for oviposition, e.g., the proximity of leaf veins, mainly those of large-caliber veins such as the midrib (principal leaf vein). At the beginning of a new row of eggs, the female could remain in the same position and just bend her abdomen, varying the position of the ovipositor in relation to her body (Figure 2A), or she could simply walk a few steps forward. The distance between successive curved rows varied between 1.1 mm and 2.1 mm. ...
Context 2
... the female oviposits with her abdomen extended backwards and the ovipositor behind her hind legs, and once she has oviposited a set of eggs, she folds her abdomen anteriorly under her body, and sometimes the ovipositor is in front of her front legs (see Figure 2A, and Romero-Lebró n et al. 34 ). At this position, she repeats the process of lacerating the tissue and placing an egg in each incision, with the particularity that the eggs are arranged in reverse ( Figure 2B) compared to eggs deposited when the ovipositor does not exceed its forelegs. ...
Context 3
... the female oviposits with her abdomen extended backwards and the ovipositor behind her hind legs, and once she has oviposited a set of eggs, she folds her abdomen anteriorly under her body, and sometimes the ovipositor is in front of her front legs (see Figure 2A, and Romero-Lebró n et al. 34 ). At this position, she repeats the process of lacerating the tissue and placing an egg in each incision, with the particularity that the eggs are arranged in reverse ( Figure 2B) compared to eggs deposited when the ovipositor does not exceed its forelegs. ...
Context 4
... morphology shows two differentiated zones: a rounded basal zone (the zone that first enters the plant tissue) and a sharper dark-colored apical zone that sometimes rests partially outside the plant tissue ( Figure 2C). The mean length of the extant eggs analyzed (n = 1787) was 0.85 G 0.01 mm (A. ...
Context 5
... number of eggs per row, and thus the total length of the curved row of eggs, was limited by the length of the damselfly abdomen, because of space restrictions and/or, apparently, by the presence of areas interpreted as undesirable for oviposition, e.g., the proximity of leaf veins, mainly those of large-caliber veins such as the midrib (principal leaf vein). At the beginning of a new row of eggs, the female could remain in the same position and just bend her abdomen, varying the position of the ovipositor in relation to her body (Figure 2A), or she could simply walk a few steps forward. The distance between successive curved rows varied between 1.1 mm and 2.1 mm. ...
Context 6
... the female oviposits with her abdomen extended backwards and the ovipositor behind her hind legs, and once she has oviposited a set of eggs, she folds her abdomen anteriorly under her body, and sometimes the ovipositor is in front of her front legs (see Figure 2A, and Romero-Lebró n et al. 34 ). At this position, she repeats the process of lacerating the tissue and placing an egg in each incision, with the particularity that the eggs are arranged in reverse ( Figure 2B) compared to eggs deposited when the ovipositor does not exceed its forelegs. ...
Context 7
... the female oviposits with her abdomen extended backwards and the ovipositor behind her hind legs, and once she has oviposited a set of eggs, she folds her abdomen anteriorly under her body, and sometimes the ovipositor is in front of her front legs (see Figure 2A, and Romero-Lebró n et al. 34 ). At this position, she repeats the process of lacerating the tissue and placing an egg in each incision, with the particularity that the eggs are arranged in reverse ( Figure 2B) compared to eggs deposited when the ovipositor does not exceed its forelegs. ...
Context 8
... morphology shows two differentiated zones: a rounded basal zone (the zone that first enters the plant tissue) and a sharper dark-colored apical zone that sometimes rests partially outside the plant tissue ( Figure 2C). The mean length of the extant eggs analyzed (n = 1787) was 0.85 G 0.01 mm (A. ...
Citations
... Description. Damage on PA MHNGr 40337 and PA MHNGr 39464 likely correspond to unidentified traces expressed as interrupted oviposition (see Table 1) (Romero-Lebrón et al., 2023), measurement of scars reaches 6.5 × 2.5 mm to 3.5 × 2.0 mm. The vegetative axe is interpreted as stems or branches measuring respectively 24 mm and 48 mm wide and could correspond either to Cordaites or Cordaicladus. ...
... In the present study, we emphasize that the Cordaicladus (Fig. 12) was impacted by interactions that we tentatively consider as damages dues to interrupted ovipositions. As stated in Romero-Lebrón et al. (2023) such behavior is known from the middle Carboniferous. Therefore, it could be inferred that the behavior of leaf vein and tissue avoidance would have been possibly present in the Westphalian C series (315.2-311.0 ...
Plant-animal interactions shed light on the ecology of the rich insect community from the middle Pennsylvanian basin of Northern France (Nord-Pas-de-Calais coal basin, Hauts-de-France). The data set derives from coal bed layers locally named the Bruay Formation and were collected on the slag heap. This work is a meta-analysis of the different types of damages caused by arthropods, especially insects, consisting of endophytic oviposition scars, holes, galls, bulges, and undetermined traces. These damage traces are associated with host plants belonging to Lycopsida, Medullosales, Pinopsida, and Polypodiopsida. The paleoenvironmental framework and mutualism within each community are also discussed. Based on the present discoveries in Northern France, these interactions may have occurred stratigraphically from Westphalian B (Anzin Formation) until to Westphalian C (Bruay Formation). Despite the limited fossilization potential and sampling difficulties due to slag heap bias, occurrences may be compared with other European localities of the Carboniferous age.
The most common macrofossils in the highly diverse flora from Laguna del Hunco (early Eocene of Chubut, Argentina) are "Celtis" ameghinoi leaves, whose true affinities have remained enigmatic for a century. The species accounts for 14% of all plant fossils in unbiased field counts and bears diverse insect-feeding damage, suggesting its high biomass and paleoecological importance. The leaves have well-preserved architecture but lack cuticles or reproductive attachments. We find that the fossils only superficially resemble Celtis and comparable taxa in Cannabaceae, Ulmaceae, Rhamnaceae, Malvaceae, and many other families. However, the distinctive foliar morphology conforms in detail to Dobinea (Anacardiaceae), a genus with two species of shrubs and large herbs ranging from India's Far East and Tibet to Myanmar and central China, and we propose Dobineaites ameghinoi (E.W. Berry) gen et. comb. nov. for the fossils. This discovery strengthens the extensive biogeographic links between Eocene Patagonia and mainland Asia, provides the first fossil record related to Dobinea, and represents a rare Gondwanan macrofossil occurrence of Anacardiaceae, which was widespread and diversified in the Northern Hemisphere at the time. The diverse leaf architecture of Anacardiaceae includes several patterns usually associated with other taxa, and many other leaf fossils in this family may remain misidentified.
