 Paranthodon was a small stegosaurid relative to larger relatives such as Stegosaurus . Thomas R. Holtz Jr. estimated that the animal was 5 @.@ 0 m ( 16 @.@ 4 ft ) long and weighed between 454 and 907 kg ( 1 @,@ 001 and 2 @,@ 000 lb ) . The snout is elongated , though not extremely so , and convex on top . The back of the premaxilla is long and broad , and the external nares are large . The teeth have a prominent primary ridge . The fossilized nasal and maxillary bones are relatively complete , and an incomplete premaxilla is also preserved . The partial snout resembles Stegosaurus in its large posterior premaxillary process and the extension of the palate . However , Stegosaurus is the only stegosaurid known from adequate cranial material to compare with Paranthodon , and even though their resemblance is great , tooth morphology is very distinguishing among the stegosaurians . For example , cranial material is only known from Stegosaurus , Paranthodon , Kentrosaurus , and Tuojiangosaurus , and in all of them , the tooth morphology differs . 
 Paranthodon was a small stegosaurid relative to larger relatives such as Stegosaurus . Thomas R. Holtz Jr. estimated that the animal was 5 @.@ 0 m ( 16 @.@ 4 ft ) long and weighed between 454 and 907 kg ( 1 @,@ 001 and 2 @,@ 000 lb ) . The snout is elongated , though not extremely so , and convex on top . The back of the premaxilla <a href='drop_aux' title='1'><mark>is</mark></a>long and broad , and the external nares <a href='drop_aux' title='2'><mark>are</mark></a>large . The teeth <a href='got' title='3'><mark>have</mark></a> a prominent primary ridge . The fossilized nasal and maxillary bones <a href='drop_aux' title='4'><mark>are</mark></a>relatively complete , and an incomplete premaxilla is also preserved . The partial snout <a href='uninflect' title='5'><mark>resembles</mark></a> Stegosaurus in its large posterior premaxillary process and the extension of the palate . However , Stegosaurus <a href='drop_aux' title='6'><mark>is</mark></a>the only stegosaurid known from adequate cranial material to compare with Paranthodon , and even though their resemblance <a href='drop_aux' title='7'><mark>is</mark></a>great , tooth morphology <a href='drop_aux' title='8'><mark>is</mark></a>very distinguishing among the stegosaurians . For example , cranial material is only known from Stegosaurus , Paranthodon , Kentrosaurus , and Tuojiangosaurus , and in all of them , the tooth morphology differs . 
Paranthodon was a small stegosaurid relative to larger relatives such as Stegosaurus . Thomas R. Holtz Jr. estimated dat da animal was 5 @.@ 0 m ( 16 @.@ 4 ft ) long and weighed between 454 and 907 kg ( 1 @,@ 001 and 2 @,@ 000 lb ) . The snout is elongated , doe not extremely soo , and convex on top . The back of tdapremaxilla long and broad , and the external nares large . Thdaeef got a prominent primary ridge . The fossilized nasal and maxillary bones relatively complete , and an incomplete premaxilla is also preserved . Thedartial snout resemble Stegosaurus in its bigass posterior premaxillary process and the extension of the palate . However , Stegosaurus the day stegosaurid known from adequate cranial material to compare w Paranthodon , and even though their resemblance great , tooth morphology very distinguishing among the sdaosaurians . fir example , cranial material is only known from Stegosaurus , Paranthodon , Kentrosaurus , and Tuojiangosaurus , and in all of them , the toda morphology differs .