Trichomycetes occurring in both lentic (lake) and lotic (stream) habitats within the Halifax Regional Municipality, Nova Scotia, Canada

Botany ◽  
2013 ◽  
Vol 91 (6) ◽  
pp. 382-402 ◽  
Author(s):  
R.T. William ◽  
D.B. Strongman
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
Habitat Preference ◽  
Aquatic Insect ◽  
Ecological Group ◽  
Frequency Of Occurrence ◽  
Aquatic Habitats ◽  
Insect Larvae ◽  
Chironomidae Larvae ◽  
Aquatic Insect Larvae

Trichomycetes are an ecological group of fungi and protists found inside the gut lumen of aquatic insect larvae and have been reported virtually everywhere trichomycetologists have looked for them. Trichomycetes are common in freshwater aquatic habitats, both lentic and lotic, though lentic habitats have been explored less frequently. An inventory of trichomycetes inhabiting both stream (lotic) and lake (lentic) habitats was conducted within the Halifax Regional Municipality, Nova Scotia, Canada, including one site at the interface where a stream emptied into a lake. Twenty-six species of trichomycetes were collected from both lotic and lentic sites, nine of which are new species, all isolated from midge (Chironomidae) larvae. These are as follows: Smittium adaiosporum sp. nov. R.T. William and Strongman, Smittium cryptancora sp. nov. R.T. William and Strongman , Smittium petilum sp. nov. R.T. William and Strongman, Smittium peculiare sp. nov. R.T. William and Strongman, Stachylina abundans sp. nov. R.T. William and Strongman, Stachylina extensiva sp. nov. R.T. William and Strongman, Stachylina infrequens sp. nov. R.T. William and Strongman, Stachylina somnisimilis sp. nov. R.T. William and Strongman, and Stachylina uranus sp. nov. R.T. William and Strongman. In addition, a new continental record for Smittium hecatei L.G. Valle & Santam. previously reported from Spain and new regional geographic records for Smittium minutisporum Lichtw., Siri & M.M. White and Smittium mucronatum Manier & Mathiez ex Manier are documented. In addition, 14 other trichomycetes previously reported from Atlantic Canada were recorded and these included both harpellid fungi and protists in the genus Paramoebidium. Insects from the orders Diptera, Ephemeroptera, and Plecoptera were all found to contain trichomycetes. Data on the frequency of occurrence and the habitat preference for some gut fungi are discussed.

Trichomycete gut fungi in New Zealand aquatic insect larvae

1990 ◽  
Vol 68 (5) ◽  
pp. 1045-1056 ◽  
Author(s):  
Marvin C. Williams ◽  
Robert W. Lichtwardt
Keyword(s):  
New Species ◽  
New Zealand ◽  
New Genus ◽  
Aquatic Insect ◽  
The Other ◽  
Insect Larvae ◽  
Widespread Species ◽  
The World ◽  
Chironomidae Larvae ◽  
Aquatic Insect Larvae

New Zealand, like other regions of the world, has now been shown to have a diverse and rich assortment of Trichomycetes (Zygomycotina). Seven of the 14 species of Harpellales we found in aquatic insect larvae are known from other land areas. The remaining seven species, consisting of six Harpellales and one Amoebidiales, are new and possibly endemic. A new genus, Austrosmittium, from Chironomidae larvae is established, with two species, A. kiwiorum and A. norinsulare. The other new species are Glotzia plecopterorum (in Plecoptera), Paramoebidium bibrachium (Amoebidiales, in Ephemeroptera), Pennella asymmetrica (in Simuliidae), and Smittium rarum and Stachylina minima (in Chironomidae). All of the new species were found either on North Island or South Island, but not both. We also report the presence on South Island of two widespread species of marine trichomycetes (Eccrinales), Enteromyces callianassae and Taeniella carcini, in anomuran and brachyuran crustaceans.

Trichomycete gut fungi in Australian aquatic insect larvae

1990 ◽  
Vol 68 (5) ◽  
pp. 1057-1074 ◽  
Author(s):  
Robert W. Lichtwardt ◽  
Marvin C. Williams
Keyword(s):  
New Species ◽  
New South ◽  
Aquatic Insect ◽  
Distribution Data ◽  
New Genera ◽  
Insect Larvae ◽  
Australian Species ◽  
South Wales ◽  
Axenic Cultures ◽  
Aquatic Insect Larvae

Arthropods containing gut fungi (Zygomycotina: Trichomycetes) were studied from 85 collecting sites in Queensland, New South Wales, Victoria, and Tasmania. The emphasis was on the fungal order Harpellales in endemic larvae or nymphs of aquatic Diptera, Ephemeroptera, and Plecoptera, but included a few Eccrinales in Crustacea. Of the more than 25 species of trichomycetes dissected from arthropods, 20 are described and illustrated. Of these, 10 are new species that are possibly endemic to Australia. All new Australian species were different from new species described in a correlated study of New Zealand trichomycetes. The new Australian species are Austrosmittium aussiorum, Glotzia tasmaniensis, Smittium aciculare, Sm. boomerangum, Sm. delicatum, Sm. paludis, Sm. rupestre, Stachylina queenslandiae, St. thaumaleidarum (Harpellales), and Parataeniella latrobi (Eccrinales). Other possible new genera and species are briefly described, but not named. Thirteen axenic cultures of Harpellales were obtained; these include one of the new species, Sm. boomerangum, and another species not previously isolated, Sm. elongatum. Some unusual insect families were found infested by Australian trichomycetes. Distribution data on these fungi and their hosts are provided.

scholarly journals Effects of bromeliad flowering event on the community structuring of aquatic insect larvae associated with phytotelmata of Aechmea distichantha Lem. (Bromeliaceae)

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Felipe Emiliano Amadeo ◽  
Juliana Déo Dias ◽  
Bianca Trevizan Segovia ◽  
Nadson Ressyé Simões ◽  
Fábio Amodêo Lansac-Tôha
Keyword(s):  
Growth Phase ◽  
Vegetative Growth ◽  
Beta Diversity ◽  
Aquatic Insect ◽  
Insect Larvae ◽  
Local Factors ◽  
Flowering Phase ◽  
Regional Factors ◽  
Aquatic Insect Larvae ◽  
Phenological Phases

Abstract Aim: We aimed to understand how aquatic insect larvae communities associated with bromeliad phytotelmata are affected by plant architecture, predators and resources (local factors), and by geographical distance (regional factors) in two different plant phenological phases. Bromeliad flowering results in plant structural changes, which favours insect dispersal. Considering that local and regional factors may affect the community of aquatic insect larvae, we expected that composition, beta diversity and the importance of those factors would differ in the vegetative growth and flowering phases. Methods We performed six samplings of the bromeliad associated fauna in 2010, three during the first semester - vegetative growth phase - and three during the second semester - flowering phase. In each sampling, we collected 12 plants along the rocky walls with similar location distribution, with a total of 72 bromeliads studied. Results Although beta diversity (PERMDISP) did not differ between vegetative growth and flowering, NMDS followed by ANOSIM showed that composition was significantly different in the distinct phenological phases. IndVal results showed that three Diptera morphospecies were discriminant of the vegetative growth phase. In addition, pRDA revealed differences in the relative contribution of local and regional factors to explain insect larvae community structure. During the flowering phase, local factors predominated, while during vegetative growth, regional factors were more important. Conclusion Differences in dispersal rates between the two phenological phases, likely due to adult insect pollination and further oviposition, influenced community structuring. Therefore, flowering events account for differences not only in the composition, but also in community structuring of aquatic insect larvae inhabiting the phytotelmata of Aechmea distichantha Lem. (Bromeliaceae).

In vitro infection experiments with eggs of the nematode Contracaecum rudolphii Hartwich, 1964 (sensu lato) targeting aquatic insect larvae (Odonata: Coenagrionidae and Libellulidae; Trichoptera: Integripalpia) as possible intermediate hosts

2014 ◽  
Vol 43 (2) ◽  
Author(s):  
Janina Dziekońska-Rynko ◽  
Jerzy Rokicki ◽  
Katarzyna Mierzejewska
Keyword(s):  
Aquatic Insects ◽  
Aquatic Insect ◽  
Intermediate Hosts ◽  
Insect Larvae ◽  
Contracaecum Rudolphii ◽  
High Prevalence ◽  
Nematode Eggs ◽  
Newly Hatched Larvae ◽  
Aquatic Insect Larvae

AbstractThe availability of aquatic insects (Odonata: Coenagrionidae, Libellulidae and Trichoptera: Integripalpia) as potential intermediate hosts for the nematode Contracaecum rudolphii Hartwich, 1964 sensu lato was studied under laboratory conditions. The infective material consisted of nematode eggs, newly hatched larvae, as well as in vitro infected cyclopoid copepods. High prevalence and intensity of infection associated with a low mortality of aquatic insect larvae suggests that they may serve as intermediate hosts for C. rudolphii and constitute a major reservoir of C. rudolphii larvae in aquatic habitats.

scholarly journals Trichomycetes in Argentinean Aquatic Insect Larvae

Mycologia ◽  
1999 ◽  
Vol 91 (6) ◽  
pp. 1060 ◽  
Author(s):  
Robert W. Lichtwardt ◽  
Leonard C. Ferrington ◽  
Claudia Lopez Lastra
Keyword(s):  
Aquatic Insect ◽  
Insect Larvae ◽  
Aquatic Insect Larvae

Tasmanian Trichomycete Gut Fungi in Aquatic Insect Larvae

Mycologia ◽  
1992 ◽  
Vol 84 (3) ◽  
pp. 384-391 ◽  
Author(s):  
Robert W. Lichtwardt ◽  
Marvin C. Williams
Keyword(s):  
Aquatic Insect ◽  
Insect Larvae ◽  
Aquatic Insect Larvae

New species of Spartiella and Legeriosimilis from mayflies and other arthropod-associated trichomycetes from Nova Scotia, Canada

Botany ◽  
2012 ◽  
Vol 90 (12) ◽  
pp. 1195-1203 ◽  
Author(s):  
Merlin M. White ◽  
D.B. Strongman
Keyword(s):  
New Species ◽  
Nova Scotia ◽  
Growth Pattern ◽  
Aquatic Insects ◽  
Unusual Feature ◽  
Ecological Group ◽  
Corophium Volutator ◽  
Potential Significance ◽  
Amphipod Crustacean ◽  
Freshwater Insects

The digestive tracts of non-predaceous, aquatic insects and other arthropods living in moist habitats harbour a group of fungal and protistan microorganisms known as trichomycetes or “gut fungi”. A former class of Zygomycota, “trichomycetes” now refers to an ecological group of gut microbes. This report adds to the growing inventory of gut fungi that have been described from Atlantic Canada, with two new fungal trichomycetes, Legeriosimilis hiemalis sp. nov. Strongman and M.M. White and Spartiella aurensis sp. nov. Strongman and M.M. White, both from Ephemeroptera (mayfly) nymphs. Legeriosimilis hiemalis is now the fourth of seven known species of the genus to be recorded only from Canadian sites. Spartiella aurensis displays an unusual feature, with thalli apparently able to grow from the hindgut back into the midgut of its host, a growth pattern not typically observed in other gut fungi. The potential significance of this development is discussed. Despite the focus on immature freshwater insects and their habitats, we also record a species of Orchesellaria from Collembola (springtails) and Astreptonema corophii from the amphipod crustacean Corophium volutator.

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