Definition
Ischnocnema hoehnei is a species of frog in the family Brachycephalidae. It is endemic to Brazil and inhabits subtropical or tropical moist lowland forests.
Overview
The species was first described by W. Wandolleck in 1907. It belongs to the genus Ischnocnema, which comprises a group of terrestrial frogs that typically exhibit direct development, meaning that they bypass a free‑living tadpole stage. I. hoehnei is found in the Atlantic Forest region of southeastern Brazil, where it occupies leaf litter and low vegetation. The International Union for Conservation of Nature (IUCN) has assessed the species as Least Concern, although it is considered potentially threatened by ongoing habitat loss due to deforestation and agricultural expansion.
Etymology/Origin
The specific epithet “hoehnei” is an eponym honoring a person with the surname Höhne (often rendered as Hoehne), who was likely a collector or researcher associated with the discovery or early study of the species. The genus name Ischnocnema derives from Greek roots: “ischno‑” meaning “thin” or “slender” and “‑cnema” meaning “leg,” referring to the generally slender limbs characteristic of the group.
Characteristics
- Size and Appearance: Like other members of Ischnocnema, I. hoehnei is a small to medium‑sized frog, typically measuring less than 30 mm in snout‑vent length. The dorsal coloration is variable but often includes shades of brown or gray, providing camouflage among leaf litter.
- Reproduction: The species exhibits direct development; embryos develop within eggs laid on land and hatch as miniature froglets, eliminating the need for an aquatic larval stage.
- Habitat Preferences: It is primarily terrestrial, favoring moist forest floor microhabitats such as leaf litter, under logs, and low vegetation. The species is associated with humid, shaded environments and is sensitive to changes in microclimate.
- Behavior: Nocturnal activity is typical, with individuals emerging at night to forage for small invertebrates. Vocalizations, when present, are relatively quiet and consist of short, high‑pitched calls used for territorial and mating purposes.
Related Topics
- Genus Ischnocnema – a diverse group of South‑American terrestrial frogs.
- Family Brachycephalidae – a family of small, direct‑developing frogs endemic to the Atlantic Forest and other Neotropical regions.
- Atlantic Forest (Mata Atlântica) – a biodiversity hotspot in Brazil that provides the primary habitat for I. hoehnei.
- Conservation of Brazilian Amphibians – broader efforts and challenges related to protecting amphibian species in Brazil, many of which face habitat loss and climate change.