Juraphyllitidae is a family of Lower Triassic phylloceratin

Phylloceratina

The Phyllocertina comprise a suborder of ammonoid cephalopods, belonging to the Ammonitida, whose range extends from the Lower Triassic to the Upper Cretaceous...

 ammonites from Europe, North Africa, and Asia characterized by narrow, evolutely coiled shells, usually with coarse ventral ribbing on the body chamber. The first lateral saddles in the suture are diphyllic, with two terminal branches, others exposed sutural saddles are diphyllic or triphyllic, those covered by successive whorls being monophyllic. A few genera are more involute, with successive whorls partially embracing the flanks of the previous. All are compressed and a few lack ribbing.

The Juraphyllitidae are probably derived from the Late Triassic Discophyllitidae

Discophyllitidae

Discophyllitidae are discoidal, generally evolute Phylloceratina from the Upper Triassic, derived from the Ussuritidae, in which the principal saddles of the suture have bifurcated or trifurcated endings, described as being di- or triphyllic. Discophyllitid shells are rather similar to those of...

 and independent from the Phylloceratidae

Phylloceratidae

Phylloceratidae is the predominant family of the Phylloceratina with some 15 or more genera found in rocks ranging from the Lower Jurassic to the Upper Cretaceous. Members of the Phylloceratidae are characterized by smooth, involute shells with very thin walls. Many are covered with fine growth...

. They apparently left no descendants.

Eight genera are included:

Juraphyllites

Tragophylloceras

Dasyceras

Schistophylloceras

Paradasyceras

Meneghiniceras

Harpophylloceras

Galaticeras

Distinctions are based on variations in overall form including nature of ribbing, ventral surface, and degree of involuteness.