Hibolithes

Hibolithes is a genus of belemnite that lived from the Middle Jurassic to the Early Cretaceous, and has been found in Antarctica,^[1][2] Greenland,^[3] Iran,^[4] Europe,^[5][6] South America, and New Zealand. In 2020, this genus was found in the Pedawan Formation (Tithonian – Hauterivian) in Sarawak, on the island of Borneo (Malaysia).^[7]

Hibolithes Temporal range: Middle Jurassic - Early Cretaceous
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
(unranked):	Belemnoidea
Order:	Belemnitida
Suborder:	Pachybelemnopseina Riegraf, 1998
Family:	Mesohibolitidae Nerodenko, 1983
Genus:	Hibolithes Montfort, 1808
Species
H. hastatus (Blainville, 1827) H. semisulcatus (Münster, 1830) H. catlinensis (Hector, 1878) H. conradi (Kilian, 1889) H. girardoti (Loriol, 1902) H. fellabrunnensis (Vetters, 1905) H. sangensis (Boden, 1911) H. jaculiformis (Shvetsov, 1913)
Synonyms
Pseudohibolites (Bliithgen, 1936) H. shimanskyi (Gustomesov, 1976) H. ivanovi (Gustomesov, 1976) H. orlovi (Gustomesov, 1976)

Species and sexual dimorphism

At least two Hibolithes species, H. conradi and H. semisulcatus, represented in Jurassic (Oxfordian and Tithonian) and possibly Early Cretaceous (Late Berriasian) zones of Hungary.^[5]

H. shimanskyi, H. orlovi and H. ivanovi from Upper Callovian-Lower Oxfordian of Bryansk Oblast and Saratov Oblast of European Russia, were described in 1976 by Gustomesov. In 2006, Ippolitov assigned H. shimanskyi as a synonym to H. girardoti due to sexual dimorphism within this species. Ippolitov also assigned H. orlovi and H. ivanovi as synonyms to H. sangensis for the same reason.^[6]