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A second species of the North American mayfly genus Amercaenis Provonsha and McCafferty (Ephemeroptera: Caenidae).

Provonsha AV, McCafferty WP - J. Insect Sci. (2006)

Bottom Line: The new species differs from the only other known species of the genus, A. ridens (McDunnough), for example, in having segments 2 and 3 of the labial palps subequal in length, and having the transverse row of setae on the forefemora consisting of long spatulate setae.Adults provisionally assigned to the new species are associated with the larvae morphologically and in locale do not fit any other adults of North American Caenidae, and differ from the congener A. ridens by dark dorsal coloration.The two species of Americaenis are biogeoraphically disjunct.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, Purdue Unviversity, West Lafayette, IN 47905, USA. provonsh@purdue.edu

ABSTRACT
A new species of the psammophilous and brushlegged North American genus Amercaenis Provonsha and McCafferty, Amercaenis cusabo Provonsha and McCafferty, new species, is described from larvae taken from the Black River (North Carolina), the Pee Dee River (North Carolina), and the Savannah River (Georgia and South Carolina). The new species differs from the only other known species of the genus, A. ridens (McDunnough), for example, in having segments 2 and 3 of the labial palps subequal in length, and having the transverse row of setae on the forefemora consisting of long spatulate setae. Adults provisionally assigned to the new species are associated with the larvae morphologically and in locale do not fit any other adults of North American Caenidae, and differ from the congener A. ridens by dark dorsal coloration. The two species of Americaenis are biogeoraphically disjunct.

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Amercaenis cusabo, larva. 1, Head and pronotum, dorsal. 2, Angulate mandible. 3, Maxilla. 4, Labium. 5, Foreleg, dorsal. 6. Hindleg, dorsal. 7, Base of abdomen, lateral. 8, Operculate gill, dorsal. 9, Abdominal sterna 7–9.
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i1536-2442-6-10-1-f01: Amercaenis cusabo, larva. 1, Head and pronotum, dorsal. 2, Angulate mandible. 3, Maxilla. 4, Labium. 5, Foreleg, dorsal. 6. Hindleg, dorsal. 7, Base of abdomen, lateral. 8, Operculate gill, dorsal. 9, Abdominal sterna 7–9.

Mentions: Head: Dorsal coloration uniform dark chestnut brown; ventral coloration pale; genal ridge (Fig. 1) slightly developed; clypeus slightly produced anteriorly, rounded, with numerous long hair-like setae (Fig. 1); vertex with small, globulate microtrichiae (Fig. 1). Planate and angulate mandible (Fig. 2) with cluster of long hair-like setae near outer margin. Maxilla (Fig. 3) with three-segmented palp; palp segment 2 less than half length of segment 3; palp segment 3 and crown of galealacinia setose; sparse setae of palp segment 2 and dense setae of palp segment 3 relatively long; sparse setae of palp segment 1 and dense setae of crown shorter. Labium (Fig. 4) with three-segmented palp; palp segments 2 and 3 subequal in length, covered with dense, long, hair-like setae; palp segment 3 also with short, distal, spine-like setae.


A second species of the North American mayfly genus Amercaenis Provonsha and McCafferty (Ephemeroptera: Caenidae).

Provonsha AV, McCafferty WP - J. Insect Sci. (2006)

Amercaenis cusabo, larva. 1, Head and pronotum, dorsal. 2, Angulate mandible. 3, Maxilla. 4, Labium. 5, Foreleg, dorsal. 6. Hindleg, dorsal. 7, Base of abdomen, lateral. 8, Operculate gill, dorsal. 9, Abdominal sterna 7–9.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2990297&req=5

i1536-2442-6-10-1-f01: Amercaenis cusabo, larva. 1, Head and pronotum, dorsal. 2, Angulate mandible. 3, Maxilla. 4, Labium. 5, Foreleg, dorsal. 6. Hindleg, dorsal. 7, Base of abdomen, lateral. 8, Operculate gill, dorsal. 9, Abdominal sterna 7–9.
Mentions: Head: Dorsal coloration uniform dark chestnut brown; ventral coloration pale; genal ridge (Fig. 1) slightly developed; clypeus slightly produced anteriorly, rounded, with numerous long hair-like setae (Fig. 1); vertex with small, globulate microtrichiae (Fig. 1). Planate and angulate mandible (Fig. 2) with cluster of long hair-like setae near outer margin. Maxilla (Fig. 3) with three-segmented palp; palp segment 2 less than half length of segment 3; palp segment 3 and crown of galealacinia setose; sparse setae of palp segment 2 and dense setae of palp segment 3 relatively long; sparse setae of palp segment 1 and dense setae of crown shorter. Labium (Fig. 4) with three-segmented palp; palp segments 2 and 3 subequal in length, covered with dense, long, hair-like setae; palp segment 3 also with short, distal, spine-like setae.

Bottom Line: The new species differs from the only other known species of the genus, A. ridens (McDunnough), for example, in having segments 2 and 3 of the labial palps subequal in length, and having the transverse row of setae on the forefemora consisting of long spatulate setae.Adults provisionally assigned to the new species are associated with the larvae morphologically and in locale do not fit any other adults of North American Caenidae, and differ from the congener A. ridens by dark dorsal coloration.The two species of Americaenis are biogeoraphically disjunct.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, Purdue Unviversity, West Lafayette, IN 47905, USA. provonsh@purdue.edu

ABSTRACT
A new species of the psammophilous and brushlegged North American genus Amercaenis Provonsha and McCafferty, Amercaenis cusabo Provonsha and McCafferty, new species, is described from larvae taken from the Black River (North Carolina), the Pee Dee River (North Carolina), and the Savannah River (Georgia and South Carolina). The new species differs from the only other known species of the genus, A. ridens (McDunnough), for example, in having segments 2 and 3 of the labial palps subequal in length, and having the transverse row of setae on the forefemora consisting of long spatulate setae. Adults provisionally assigned to the new species are associated with the larvae morphologically and in locale do not fit any other adults of North American Caenidae, and differ from the congener A. ridens by dark dorsal coloration. The two species of Americaenis are biogeoraphically disjunct.

Show MeSH