YPM IP 237253, Narragansettichnus fortunatus new ichnogenus and ichnospecies, the body imprint of an insect (probably ephemeropteran
) from the Pennsylvanian Rhode Island Formation of Massachusetts, with an interpretive line drawing.
All predators relied heavily on ephemeropterans
In addition, seven species (one pseudoscorpion, one collembolan, one bivalve, one ephemeropteran
, and three trichopterans) are removed from the state list; a synthesis of new distributional records are added for two gastropods, one coleopteran, and one amphibian, and changes in nomenclature are provided for three gastropods and two coleopterans.
The macrobenthic community was in terms of biomass and density dominated by the following taxa: oligochaetes Stylaria lacustris (L.), Limnodrilus hoffmeisteri Claparede, and species of the genus Nais; the hirudineans Erpobdella octoculata (L.) and Glossiphonia complanata (L.); the amphipods Gmelinoides fasciatus (Stebbing) and Pontogammarus robustoides (Sars); the ephemeropterans
Kirikulaht, a lagoon closely connected with the bay of Reigi laht, revealed a diverse freshwater fauna dominated by chironomid and ephemeropteran
larvae, nematodes, and planktonic cladocerans.
The relative ease with which the range of tolerance values regarding the parameters investigated were obtained suggests that empirically derived tolerance ranges for most Ephemeropteran
species can be determined.
Sculpin from 15% embedded streams consumed ephemeropterans
, trichopteran and dipteran larva comprised the majority of darter prey items, although a few other taxa, particularly ostracods, were also present (Fig.
The symbiotic relationship of a chironomid with its Ephemeropteran
(caps?) host in an Arizona mountain stream.
Macroinvertebrate taxa richness varied among sampling sites (mean = 15.04; range, 3 to 29), especially Ephemeropteran
, Plecopteran and Trichopteran (EPT) taxa richness (mean = 4.48; range, 0 to 11).
nymphs (mainly Baetidae) were the predominant food items (Table 3) of YOY sturgeon; this insect order and Simulidae were absent from the lake samples (summer and winter).
and Trichopterans were also consumed, but at lower percentages relative to bivalves and chironomids (Table 1).