Table 1 Distribution of recurrent ichnogenera in chalk, based on this study (for lagoonal chalk) and literature compilation (for shelf and deep-sea chalk21,28,29,30,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143; see Supplementary Table S2 for references). The categories of abundance follow the percentage of occurrence in the different chalks: Very common (≥ 75%), common (25–74%), uncommon (15–24%), rare (1–14%), absent (0%).
From: Animal–substrate interactions preserved in ancient lagoonal chalk
Ichnogenus | Lagoonal Chalk | Shelf-sea Chalk | Deep-sea Chalk |
|---|---|---|---|
Bichordites | Very common | Rare | Absent |
Chondrites | Very common | Very common | Very common |
Cylindrichnus | Absent | Uncommon | Uncommon |
Gyrolithes | Uncommon | Rare | Absent |
Ophiomorpha | Absent | Uncommon | Rare |
Palaeophycus | Common | Common | Rare |
Phycosiphon | Absent | Common | Absent |
Planolites | Very common | Very common | Very common |
Skolithos | Absent | Rare | Common |
Taenidium | Very common | Common | Rare |
Teichichnus | Common | Common | Common |
Thalassinoides | Very common | Very common | Common |
Trichichnus | Absent | Common | Rare |
Zoophycos | Absent | Very common | Very common |
