. The Canadian field-naturalist. 472 The Canadian Field-Naturalist Vol. 110. Exoglossum maxillingua o captured before 1950 • captured 1950 - 1989 0 25 SO K ilometres Figure 2. Distribution of the Cutiips Minnow in Canada, Exoglossum maxillingua. A point may represent more than one capture at different sites within the area of the circle. Inset: North American distribution modified from Gilbert and Lee (1980). the mid 1980s (Mandrak and Grossman 1992). Despite the much larger scale of sampling, compared to that in the 1930s, the surveys captured the species at only six additional sites in the R
. The Canadian field-naturalist. 472 The Canadian Field-Naturalist Vol. 110. Exoglossum maxillingua o captured before 1950 • captured 1950 - 1989 0 25 SO K ilometres Figure 2. Distribution of the Cutiips Minnow in Canada, Exoglossum maxillingua. A point may represent more than one capture at different sites within the area of the circle. Inset: North American distribution modified from Gilbert and Lee (1980). the mid 1980s (Mandrak and Grossman 1992). Despite the much larger scale of sampling, compared to that in the 1930s, the surveys captured the species at only six additional sites in the Raisin River sys- tem. Little Rideau Creek, and at one site in the St. Lawrence River. The unsuccessful capture attempts and the scarcity of records after 1970 suggest that populations in Ontario have declined in abundance from former levels. The species is more widely distributed in Quebec where 284 collections have been made at 274 sites. The species was first recorded in 1935 from the upper section of the Ulverton River (Saint-Frangois river system) and in a few streams of the Nicolet system. At that time, Exoglossum maxillingua was consid- ered to be one of the rarest minnows in the Eastern Townships (Richardson 1935). In 1941, the species was also recorded from below the Rapides du Rocher Fendu, Lac Saint-Louis, and the Chateauguay, Chaudiere, and Saint-Denis river systems. Surveys conducted by MLCP in several major St. Lawrence River systems from 1960 to 1982 captured the species in many of the rivers where it was for- merly known and found it at numerous other sites in the St. Lawrence River of Quebec (see Table 1). Distribution records indicate that Exoglossum max- illingua occurs at the greatest number of locations in the Riviere Chateauguay system (82 records, 1941 to 1989) and in the St. Lawrence River below Rapides de Lachine in the Montreal region (36 records, 1967 to 1989). In the Chateauguay it is particularly com- mon in the streams of the upper half of the dra
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