Southern-appalachians
Guides
Antrodiaetus unicolor
folding-door spider, collared spider
Antrodiaetus unicolor is a mygalomorph spider in the family Antrodiaetidae, historically considered a single widespread species but now recognized as a species complex containing multiple cryptic species. These spiders construct silk-lined burrows with folding doors rather than the hinged trapdoors of related families. Research using genomic-scale data has revealed substantial hidden diversity within this morphologically conserved group, particularly in the southern Appalachian Mountains.
Dasycerus
Dasycerus is the sole extant genus in the rove beetle subfamily Dasycerinae, comprising 25 recognized species. Nine cryptic species were recently discovered in 2024, previously attributed to D. carolinensis, distinguishable only by male aedeagal dissection or DNA analysis. The genus exhibits notable intraspecific genetic diversity and cryptic speciation, particularly in montane populations.
Fumontana deprehendor
Fumontana deprehendor is the sole species in the monotypic genus Fumontana, a harvestman (order Opiliones) endemic to the southern Appalachian Mountains. Originally described from only four specimens at two old-growth forest localities, expanded field surveys have documented 141 individuals across 22 newly-discovered populations throughout the Appalachian uplands. The species exhibits minimal geographic variation in both body and genital morphology across its disjunct range. Its conservation status has shifted from perceived hyper-rarity to recognition of broader distribution with geographically isolated population units requiring continued study.
Ligidium blueridgensis
Ligidium blueridgensis is a terrestrial isopod species in the family Ligiidae, described in 1964 from specimens collected in the southern Blue Ridge Mountains. The species exhibits a disjunct distribution across multiple biogeographical barriers in Georgia, North Carolina, South Carolina, and Tennessee, with deeply divergent mitochondrial lineages suggesting long-term persistence and diversification in the region. It is one of several morphologically similar Ligidium species in the southern Appalachians.
Nebria appalachia
southern Appalachian gazelle beetle
Nebria appalachia is a flightless ground beetle endemic to the southern Appalachian Mountains. Adults are brachypterous, with reduced wings preventing aerial dispersal. The species occupies a restricted geographic range limited to mid- to upland mixed forests in North Carolina and Tennessee.
Sensillanura
Sensillanura is a genus of springtails (Collembola: Neanuridae) established by Deharveng in 1981. The genus is characterized by specific arrangements of sensilla on the body, a diagnostic feature for the group. Recent taxonomic work has described six new species from the Southern Appalachian Mountains, expanding the known diversity of the genus in North America. Species identification relies heavily on detailed examination of chaetotaxy and sensory structures.