Siphlonurus typicus

(Eaton, 1885)

primitive minnow mayfly

Siphlonurus typicus is a of minnow in the . It inhabits temporary ponds in eastern North America, where develop from March through June and emerge from late May to mid-June. Development is strongly temperature-dependent, with degree days serving as an excellent predictor of maturity.

Pronunciation

How to pronounce Siphlonurus typicus: /ˌsɪfloʊˈnjuːrəs ˈtɪpɪkəs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Siphlonurus by specific morphological characters of the minnow group; exact diagnostic features not detailed in available sources.

Habitat

Temporary ponds in forested and meadow settings. Documented occur in eastern Connecticut, specifically at the University of Connecticut Forest pond and Merrow Meadows pond.

Distribution

North America; specifically documented in eastern Connecticut with confirmed at two temporary pond sites. GBIF records indicate presence in the Nearctic region.

Seasonality

active from March to June; and mating occur from 27 May to 21 June.

Life Cycle

Nymphal development spans March to June, tracked through 11 maturity based on capsule width measurements. Earlier-hatched achieve larger head capsule widths than later-hatched individuals. and mating occur from late May to mid-June. occurs directly on pond surfaces, inlets, and outlets.

Behavior

at multiple locations (ponds, inlets, outlets) indicates result from both local migrants and permanent residents. Development rate varies by location; the University of Connecticut Forest population matured faster but produced smaller individuals than the Merrow Meadows population.

Human Relevance

May be of interest to fishermen as a representative of minnow , though specific angling significance not documented in available sources.

Similar Taxa

Other Siphlonurus speciesShare characteristics as minnow ; specific distinguishing characters not detailed in available sources

More Details

Development methodology

Researchers developed a new application using 11 maturity and capsule width measurements to track nymphal development and growth, with degree days serving as an excellent predictor of maturity (r²=0.963).

Population variation

Study documented intraspecific variation between two Connecticut : UCF pond population matured faster but was smaller than MER pond population. Sex ratio was female-biased at UCF pond (1.35:1) but not significantly different at MER pond.