Dusky catshark vs small tortoiseshell

Bythaelurus incanus compared with Aglais urticae

Key Differences

• Dusky catshark is Data Deficient while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Dusky catshark	small tortoiseshell
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Arthropoda (สัตว์ขาปล้อง)
Class	Chondrichthyes (ปลากระดูกอ่อน)	Insecta (แมลง)
Order	Carcharhiniformes (อันดับปลาฉลามครีบดำ)	Lepidoptera (ผีเสื้อ)
Family	Scyliorhinidae	Nymphalidae (Brush-footed Butterflies)
Genus	Bythaelurus	Aglais
Species	Bythaelurus incanus	Aglais urticae

Evolutionary Relationship

Dusky catshark and small tortoiseshell share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Dusky catshark

DD — Data Deficient

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Dusky catshark	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Dusky catshark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

small tortoiseshell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (41 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

small tortoiseshell

small tortoiseshell (Aglais urticae) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.