The Mordellidae (Coleoptera) of the Maritime provinces of Canada

Majka, Christopher G.; Jackman, John A.

doi:10.4039/n05-080

Cited by 12 publications

(11 citation statements)

References 5 publications

(7 reference statements)

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“…This may represent an island-associated diminution, a paucity of collecting, or a combination of both. Majka & McCorquodale (2006) found that Cape Breton Island had 41% of the Maritime Provinces fauna of native Coccinellidae, and Majka and Jackman (2006) found the same proportion (41%) of native Mordellidae. In examining the saproxylic Tetratomidae, Melandryidae, Synchroidae, and Scraptiidae, Majka & Pollock (2006) found 32% of the native Maritime species on Cape Breton, while Majka (2006) examining another grouping of saproxylic families, the Mycteridae, Boridae, Pythidae, Pyrochroidae, and Salpingidae, found 53% of the Maritime Provinces species on Cape Breton.…”

Section: Contemporary Composition and Zoogeographymentioning

confidence: 92%

The ground beetles (Coleoptera: Carabidae) of the Maritime Provinces of Canada: review of collecting, new records, and observations on composition, zoogeography, and historical origins

Majka

Bousquet

Westby

2007

Zootaxa

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The Carabidae of Nova Scotia and New Brunswick are surveyed. The collecting history of the family in the region is reviewed. New records of 20 species are reported, 6 from New Brunswick and 15 from Nova Scotia. Six species are newly recorded in the Maritime Provinces (New Brunswick, Nova Scotia, and Prince Edward Island) as a whole. Six species are removed from the faunal list of Nova Scotia and one from the faunal list of New Brunswick. Consequently, 282 species of Carabidae are now known from Nova Scotia, 273 species from New Brunswick, and 329 from the Maritime Provinces as a whole. A new and earlier timeline (1942) is reported for the introduced Palearctic carabid, Bembidion properans (Stephens), in North America. The status of Stenolophus carbo Bousquet in the region is reviewed and its presence in Nova Scotia is considered doubtful. The historical origins of the Maritime fauna are discussed based on studies of post-glacial Coleoptera. These indicate at least three colonization phases, some elements of which are still apparent in the contemporary fauna. Elements of the native Nova Scotia fauna not found in New Brunswick (26 species), may represent colonization from New England across post-glacial land bridges and island chains. Elements of the native fauna found in New Brunswick and not Nova Scotia (31 species), may represent species that have reached the eastward limit of their distribution for climatic or environmental reasons; or that have found the Northumberland Strait and/or the isthmus of Chignecto an obstacle to geographical dispersal; or represent widely distributed boreal species (6 species) that should be sought in Nova Scotia. Eighteen species of Nova Scotia carabids have been recorded only from Cape Breton Island, two of which are known in Atlantic Canada solely from there. Although Cape Breton is separated from the mainland by the 1.5 km wide Strait of Canso, the number of flightless, native carabids present is proportionally greater than that in Nova Scotia overall, or the Maritime Provinces as a whole. Despite differences in land mass and distance to the neighbouring mainland, the faunas of Cape Breton, Prince Edward Island, and insular Newfoundland, exhibit similarities in size and composition, although Newfoundland's fauna has twice the proportion of Holarctic species. Cape Breton's carabid fauna is diminished compared to the neighbouring mainland, having only 57% of the native species. This may represent an island-associated diminution, the paucity of collecting, or a combination of both, although in comparison with other groups of Coleoptera the Carabidae appear relatively well represented. Within Atlantic Canada, New Brunswick has the lowest proportion (8.8%) of introduced carabids and the highest proportion (83.2%) of native, Nearctic species. Given the potential utility of carabids as bioindicators, and the wide range of disturbance to which the environment of the Maritime Provinces has been subjected, further research on this diverse group of beetles would be desirable.

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Section: Contemporary Composition and Zoogeographymentioning

confidence: 92%

The ground beetles (Coleoptera: Carabidae) of the Maritime Provinces of Canada: review of collecting, new records, and observations on composition, zoogeography, and historical origins

Majka

Bousquet

Westby

2007

Zootaxa

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“…Th is may represent an island-associated diminution, the paucity of collecting, an area effect, or a combination of all these factors. In comparison, Majka and McCorquodale (2006) found that Prince Edward Island had 39% of the native Maritime Provinces fauna of Coccinellidae, Majka and Jackman (2006) found 40% of Maritime species of Mordellidae, Majka et al (2007) found 32% of the native Maritime Cerambycidae, and Majka et al (2008) found 49% of the native Maritime Carabidae that occur on Prince Edward Island.…”

Section: Discussionmentioning

confidence: 99%

The aquatic Coleoptera of Prince Edward Island, Canada: new records and faunal composition

Majka¹

2008

535

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Th e aquatic Coleoptera (Gyrinidae, Haliplidae, Dytiscidae, Hydrophilidae, Elmidae, Dryopidae, Heteroceridae) of Prince Edward Island, Canada is surveyed. Seventy-two species are now known to occur on Prince Edward Island, 26 of which are added to the island's faunal list. Th ree species, Gyrinus aquiris LeConte, Oulimnius latiusculus (LeConte), and Helichus striatus LeConte, are removed since there are no voucher specimens or published records to substantiate their presence. Th e name Dineutus horni is designated as an incorrect subsequent spelling of Dineutus hornii Roberts, 1895. Th e composition of the fauna is briefl y discussed, both from regional and zoogeographic perspectives. Th ere is only one introduced species, Helophorus grandis Illiger. Only one third of the aquatic fauna recorded on the neighbouring mainland has been found on Prince Edward Island, perhaps refl ecting an island-associated diminution, the paucity of collecting, an area eff ect, or a combination of all these factors. Th e island faunas of Prince Edward Island, Cape Breton Island, and insular Newfoundland are compared. Prince Edward Island's is 36% smaller than the others, in contrast with the island's carabid fauna which is almost identical in magnitude with that of Cape Breton. Th is might refl ect dispersal obstacles, the relative paucity of aquatic habitats on the island, or an insuffi cient collecting eff ort. Further research would be desirable, both to better discern the composition of the province's fauna, as well as to monitor the health of aquatic ecosystems in relation to anthropogenic activities.

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“…In practice this means stands where trees average 150 years (sugar maple, yellow birch, beech), 200 years (red spruce and white pine) or 300 years (eastern hemlock) depending on species composition. Majka (2006Majka ( , 2007, Majka and Jackman (2006), Majka and Pollock (2006), (Majka et al , 2007a.…”

Section: Discussionmentioning

confidence: 99%

The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles

Majka

2007

Zootaxa

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The Family Eucnemidae in the Maritime Provinces of Canada is surveyed. Eleven species are now known from the region. Ten species are recorded in Nova Scotia, six in New Brunswick, and four on Prince Edward Island. Nine new provincial records (four from Nova Scotia, four from Prince Edward Island, and one from New Brunswick) are reported, and two species, Microrhagus triangularis (Say) and Nematodes penetrans (LeConte), are newly recorded in the Maritime Provinces as a whole. The four species reported from Prince Edward Island are the first records of the family Eucnemidae from the province. The composition of the fauna is in broad agreement with that of northeastern North America. The faunas on Prince Edward and Cape Breton Islands are diminished with respect to the mainland, but are more robust than that of other saproxylic groups. Many species of eucnemids have been very infrequently collected and may actually be rare. In this regard eucnemids are similar to many other groups of saproxylic beetles, although they are proportionately even less abundant than many other groups. A variety of studies that have reported on this phenomenon have pointed to the history of forest management in the region as potential being responsible for this scarcity. The eucnemids in this region are almost entirely associated with deciduous trees. The history of forest management in the Maritime Provinces, as well as that of introduced forest diseases, is such as to have had a major impact on the composition and structure hardwood forests, and hence potentially on insects such as eucnemids which are reliant on these hosts. Consequently further research is urged in order to better ascertain their status, and to develop appropriate conservation measures for these important indicator species of diverse forest structure.

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The Mordellidae (Coleoptera) of the Maritime provinces of Canada

Cited by 12 publications

References 5 publications

The ground beetles (Coleoptera: Carabidae) of the Maritime Provinces of Canada: review of collecting, new records, and observations on composition, zoogeography, and historical origins

The ground beetles (Coleoptera: Carabidae) of the Maritime Provinces of Canada: review of collecting, new records, and observations on composition, zoogeography, and historical origins

The aquatic Coleoptera of Prince Edward Island, Canada: new records and faunal composition

The Eucnemidae (Coleoptera) of the Maritime Provinces of Canada: new records, observations on composition and zoogeography, and comments on the rarity of saproxylic beetles

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