New York Natural Heritage Program
Southern Pygmy Clubtail
Lanthus vernalis Carle, 1980

Habitat [-]
Larvae (in at least 3 different size classes) can sometimes be numerous in spring-fed rills, but the secretive adults are rarely observed. The preferred habitat is small spring brooks and seepage areas, but it can also occasionally occur in small coldwater rivers with very high water quality (i.e., groundwater fed) and therefore can be considered an indicator of waters capable of sustaining native brook trout strains. Territorial adult males perch 3-4 meters above the seep and live in surrounding forests (Carle, 1980; SaintOurs 2002).

Associated Ecological Communities [-]
  • Confined river
    The aquatic community of relatively large, fast flowing sections of streams with a moderate to gentle gradient.
  • Marsh headwater stream
    The aquatic community of a small, marshy perennial brook with a very low gradient, slow flow rate, and cool to warm water that flows through a marsh, fen, or swamp where a stream system originates. These streams usually have clearly distinguished meanders (i.e., high sinuosity) and are in unconfined landscapes.
  • Rocky headwater stream
    The aquatic community of a small- to moderate-sized perennial rocky stream typically with a moderate to steep gradient, and cold water that flows over eroded bedrock, boulders, or cobbles in the area where a stream system originates.

Associated Species [-]
  • Delta-Spotted Spiketail (Cordulegaster diastatops)
  • Spine-Crowned Clubtail (Gomphus abbreviatus)
  • Maine Snaketail (Ophiogomphus mainensis)