The unusual genus Ramiheithrus (Trichoptera: Philorheithridae)

Clair, Rosalind M. St

doi:10.24199/j.mmv.2021.80.08

Cited by 2 publications

(6 citation statements)

References 2 publications

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“…In general, boundary species were not necessarily headwater specialists restricted to the smallest streams, and many occur widely throughout SE Australia in the headwater and transfer zones of river systems, as defined by geomorphologists (see Methods). Some species which we encountered were rare (e.g., Russobex cuneatus [St Clair, 1988]) or new (we collected five previously unknown species and one new genus). Some other species were unusual and have larvae that may be terrestrial or that typically occupy wet seeps, such as Caloca spp.…”

Section: Discussionmentioning

confidence: 99%

“…(Calocidae) (Shackleton, 2013) and Ramiheithrus spp. (Philorheithridae) (St Clair, 2021), but these taxa may not be headwater specialists per se . Wet seeps are common near to, or on the margins of, stream channels and these species occurred at all three locations types (Up, Middle and Down).…”

Section: Discussionmentioning

confidence: 99%

Section: Boundary Versus Non-boundary Speciesmentioning

confidence: 98%

“…The exception, Ecnomus pansus, was observed only once at one Up location. Our small, high-gradient streams may not provide suitable habitat for their larvae (Lancaster & Downes, 2017b, 2021, and this individual may be an itinerant.…”

Section: Characteristics Of Boundary Speciesmentioning

confidence: 99%

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Connected headwaters: Indelible field evidence of dispersal by a diverse caddisfly assemblage up stream valleys to dry catchment boundaries

Lancaster,

Downes,

Finn

et al. 2023

Freshwater Biology

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Abstract1. Integral to many ecological models is the notion that dispersal connects populations and communities in disparate locations. For stream insects, however, there is very little empirical information about which species and what proportion of the species in a community are likely to disperse, in what direction and how far they travel, and whether dispersal is successful in connecting populations and communities. This study examines whether species of caddisfly can disperse between catchments and potentially connect communities.2. We used a novel sampling design comprising five pairs of streams. Each stream in a pair flowed from the same boundary, but in opposite directions and into isolated catchments. We surveyed abundances of adult caddisflies on the catchment boundary (boundary species) where there was no water (Up location), and on two locations per stream (Middle, Down locations) where there was permanently flowing water (resident species). If caddisflies fly along the topographic features of stream valleys, then we expected to find adults on the ridge between catchments and, if dispersal is successful, stream communities in adjacent catchments should have similar species composition.3. Over 130 species of caddisfly (from 18 families) were collected. Approximately half of them occurred on at least one catchment boundary, and Up locations averaged almost 20 species. Boundary species included both the smallest‐ and largest‐bodied taxa and they were a near perfect subset of species in resident assemblages. However, boundary species were not simply the most common in resident assemblages. There was no evidence of sex‐biased dispersal. Unsurprisingly, assemblage composition varied across the landscape, within and among catchments. However, resident assemblages within stream pairs were significantly more similar to one another than unpaired streams in either the same or in different catchments.4. Our results suggest that a surprisingly diverse set of caddisflies disperse up to catchment boundaries and potentially connect streams on either side of catchment divides. Nevertheless, many other caddisfly species were never recorded at Up sites and hence may never or only rarely reach catchment boundaries.5. These outcomes suggest, firstly, that some caddisflies are capable of trans‐catchment dispersal but it is incorrect to assume that all caddisflies are good dispersers, as is often stated in the literature. Secondly, caddisfly assemblages in headwater streams may be less isolated than is often considered and the dendritic structure of stream networks may be less important for their distribution patterns than the proximity of tributaries in neighbouring catchments, in many landscapes. Trans‐catchment dispersal could ensure community connectivity and facilitate recovery after catchment‐wide extinctions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Boundary Versus Non-boundary Speciesmentioning

confidence: 98%

Section: Characteristics Of Boundary Speciesmentioning

confidence: 99%

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Connected headwaters: Indelible field evidence of dispersal by a diverse caddisfly assemblage up stream valleys to dry catchment boundaries

Lancaster,

Downes,

Finn

et al. 2023

Freshwater Biology

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“…Since 1982, many new taxa in assorted families have been described, including Antipodoeciidae (St Clair et al, 2018), Calocidae (Neboiss, 1984a;Shackleton, 2010Shackleton, , 2013Webb, 2014a, 2015;Shackleton et al, 2014b), Hydrobiosidae (Schmid, 1989), Hydropsychidae (Neboiss, 1984c;Dean, 2001;Wells and Neboiss, 2018), Hydroptilidae (Wells, 1985a(Wells, , 1990(Wells, , 1998(Wells, , 1999(Wells, , 2002(Wells, , 2005(Wells, , 2010b(Wells, , 2021Wells and Dostine, 2016;Wells and Kjer, 2016), Leptoceridae (St Clair, 1988;Neboiss, 1989;Neboiss and Wells, 1998;Wells, 2000Wells, , 2004Wells, , 2006, Ecnomidae (Cartwright, 1990b(Cartwright, , 2008(Cartwright, , 2009(Cartwright, , 2010a(Cartwright, , 2011a, Odontoceridae (Wells and St Clair, 2021), Polycentropodidae (Neboiss, 1992b(Neboiss, , 1994Cartwright, 2021), Helicopsychidae (Johanson, 1995(Johanson, , 1997, Conoesucidae (Jackson, 1998b), Atriplectidae (Neboiss, 1999), Philopotamidae (Cartwright, 2002…”

Section: Descriptions Of Adult Trichoptera Since 1982mentioning

confidence: 99%

Taxonomic status and distribution of Australian caddisflies (Insecta: Trichoptera)

Cartwright¹,

Wells²,

Dean³

et al. 2023

Mem. Mus. Vic

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This review of the status of Australian caddisflies focuses on publications from 1982 to 2022. Information is provided on new species described in that period, new keys, new descriptions of both adults and larvae, and the distribution of families and genera from states/regions and the Northern Territory. Australia’s caddisfly fauna now totals 27 families, 111 genera and 868 species, with 97.9% of species endemic to Australia (only 19 of the 868 species are known from outside Australia, mainly from the nearby island of New Guinea – Papua New Guinea and Papua Province, Indonesia); some species also extend into New Zealand and South-East Asia. The biogeography of the Australian fauna is discussed briefly in terms of “northern” and “southern” faunal elements, faunal provinces, distributional barriers, areas of highest biodiversity and refuge areas. Northern and southern elements in the Australian Trichoptera fauna are indicated. The highest biodiversity is recorded in the following states/regions: New South Wales with 263 species, northern Queensland (N-Qld) with 248 species and Victoria with 247 species. The highest endemicity is in southern Western Australia (S-WA), with 73% endemic species, followed by N-Qld with 58% and Tasmania with 57%. The lowest numbers of species have been recorded from South Australia and S-WA, with 42 and 49 species respectively.

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The unusual genus Ramiheithrus (Trichoptera: Philorheithridae)

Cited by 2 publications

References 2 publications

Connected headwaters: Indelible field evidence of dispersal by a diverse caddisfly assemblage up stream valleys to dry catchment boundaries

Connected headwaters: Indelible field evidence of dispersal by a diverse caddisfly assemblage up stream valleys to dry catchment boundaries

Taxonomic status and distribution of Australian caddisflies (Insecta: Trichoptera)

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