Chondrichthyes are aquatic vertebrates with paired fins, paired nares, placoid scales, conus arteriosus in the heart, and a lack of opercula and swim bladders. Within the infraphylum …

Feb 8, 2025 · chondrichthyan, (class Chondrichthyes), any member of the diverse group of cartilaginous fishes that includes the sharks, skates, rays, and chimaeras. The class is one of …

Feb 8, 2025 · At this time the chondrichthyan fishes, which had reached their greatest flowering during the Carboniferous, became greatly reduced. They remained so until the Jurassic (about …

The meaning of CHONDRICHTHYAN is a fish of the class Chondrichthyes : a cartilaginous fish. How to use chondrichthyan in a sentence.

Feb 8, 2025 · Chondrichthyan - Cartilaginous Skeleton, Gills, & Fins: Chondrichthyans have distinguishing features like a cartilaginous skeleton, five to seven fully developed gill clefts, …

Apr 12, 2024 · Chondrichthyes, derived from the Greek words “chondr” meaning cartilage and “ichthys” meaning fish, refers to a class of jawed fishes characterized by their cartilaginous …

Chondrichthyes is a class of jawed fishes having a cartilaginous skeleton. The class includes a diverse group of fishes including sharks, rays, skates and chimaeras. They are mostly marine …

Jan 24, 2019 · Chondrichthyans are one of two major clades of living jawed vertebrates, with a rich fossil record potentially extending back to the Late Ordovician (455 million years ago, …

Feb 24, 2025 · What are chondrichthyans? Chondrichthyans are cartilaginous — as opposed to bony (teleost) — fishes. This fish group evolved 450 million years ago and is the oldest jaw …

May 29, 2023 · Chondrichthyes are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage (rather than bone). They are divided into …