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在山东省莒南地质公园内发现6个小型恐龙足迹化石,被归入足迹属Minisauripus。化石产于下白垩统大盛群田家楼组,时代为早白垩世巴列姆(Barremian)—阿普特期(Aptian)。5个较大,长约6cm,产于下部“主”层面上,其中4个组成2节行迹;1个较小,长约3cm,位于“主”层面30cm之上的上部层面上。山东Minisauripus的特征是:足迹个体小(长3.1~5.6cm,宽2.0~3.7cm),三趾型,略不对称;足迹纵长,各趾近平行,趾垫较清晰;趾末端较钝,但爪迹较尖。Ⅲ趾比Ⅳ趾略长,而Ⅳ趾比Ⅱ趾略长且窄。此外,步幅较长,足长与步长之比约为10∶1。与四川、韩国的Minisauripus不同之处是:足迹个体较大,长约是它们的2倍。继中国四川和韩国之后,山东是Minisauripus在全球的第三个发现点。
Six small dinosaur footprint fossils have been found in Junan Geopark in Shandong Province and are classified as Minisauripus. Fossils produced in the Lower Cretaceous Dashengqu Tianjialou group, the age of the Early Cretaceous Barremian (Barremian) - Aptian period (Aptian period). Five larger, about 6cm long, produced in the lower “main ” level, of which four constitute 2 knots; a smaller, about 3cm, located in the “main” level 30cm above the upper level on. The characteristics of Shandong Minisauripus are as follows: Footprints are small (3.1 ~ 5.6cm in length and 2.0 ~ 3.7cm in width), three-toe type, slightly asymmetrical; the footprints are long and narrow, the toes are nearly parallel and the toe pad is clearer; But the paw marks more sharp. Ⅲ toe slightly longer than the fourth toe, and Ⅳ toe slightly longer than the toes and narrow. In addition, the stride is longer and the ratio of foot length to step length is about 10: 1. The difference between Minisauripus in Sichuan and South Korea is that footprints are larger and about twice as long as they are. Following China’s Sichuan and South Korea, Shandong is the third-spot in the world for Minisauripus.