provided by Memoirs of the American Entomological Society
Dicaelus (Paradieaelus) teter Bonelli
Dicaelus teter Bonelli, 1813:449. Type locality: " Amerique septentrionale " ;
(determined from original description). — Le Conte, 1848:431. Dicaelus ovipennis Casey, 1913:152; [type specimen a male, in Casey Coll.,
USNM no. 47362]. Type locality: North Carolina; (determined from
original description). — Leng, 1920:62.
A combination of relatively narrow pronotal base, sides of pronotum reflexed, and sinuate posteriorly (fig. 93), surface of integument generally smooth and shining, and the mandibles peculiar to the politus group separate this species from all others of the genus.
Variation. — There is distinct, and probably geographical, size variation. A series of twenty males chosen at random throughout the range of the species vary in length from 16.2-19.2 mm. (mean 17.8 mm.), twenty females vary from 14.9-21.2 mm. (mean 18.1 mm.). For a summary of data on variation in maximum width for this species, see table 21. For the ratios PN : W/L, and PN : W base/ W apex, see tables 22 and 23.
Surface sculpture varies, and all extremes can be found within the series of specimens collected in the state of New York. The proportions of the terminal palpal segments vary slightly but seemingly at random. The lateral margins of the pronotum vary posteriorly from strongly sinuate to weakly straight, and anteriorly from strongly arcuate to almost straight, but again in no geographical pattern. The posterior lateral sinuation is lacking in three specimens collected at Monte Sano, Walker County, Alabama, and these specimens are large in size: two males, 20.0 and 21.2 mm.; one female, 21.4 mm. These specimens may be sufficiently different to warrant their inclusion in a separate subspecies but their status cannot be determined on the basis of so few specimens. In thirty of forty specimens examined there was no evidence of beading ; in eight specimens the bead extends for about 1/2 the length of the lateral margins, and for 1/4 and 3/4 of the length of the lateral margins in two specimens. The 6th abdominal sternite has a variable number of setigerous punctures : for 20 males, 4-6 (4.5) ; for 20 females, 5-11 (7.4). The male genitalia do not exhibit any significant variation, and are like those of ambigims.
Synonymical Notes. — Casey's species, D. ovipennis, is based on a smaller than average specimen of D. teter. The small parallel-sided pronotum may be simply the result of general small size, and the seeming inflation of the elytra is probably the result of the more than average narrowing of the elytra at base. Reticulation of the elytra is a variable character and is not of much use as a diagnostic character in this species. Variation in the length of segments of the maxillary palpi is insignificant, and I therefore relegate the name Dicaelns ovipennis, which is based on the above characters, to the synonymy of D. teter.
Distribution. — This species ranges through the Appalachian region of eastern United States southward to northern Alabama, westward to southwestern Indiana, northward to southern Canada, and eastward to the Atlantic. In altitude, this species ranges from at or near sea level, to at least 5000' in the Smoky Mountains.
I have taken this species in a variety of localities in New York State and in southwestern Pennsylvania, always under cover in moist, forested areas.
I have examined one hundred seventy-six males and one hundred forty-six females collected in the following states.
Peripheral localities — Ontario: Brant County, Hamilton. Connecticut: Litchfield County, Cornwall. Alabama: Madison County, Monte Sano. Michigan : Washtenaw County. Additional states — District of Columbia. Georgia. Kentucky. Maryland. New Jersey. New York. North Carolina. Ohio. Pennsylvania. Tennessee. Virginia. West Virginia.
mem. amer. ent. soc, 16.
- bibliographic citation
- Ball, G.E. 1959. A Taxonomic Study of the North American Licinini with Notes on the Old World Species of the Genus Diplocheila Brulle (Coleoptera). Memoirs of the American Entomological Society vol. 16. Philadelphia, USA
Dicaelus teter: Brief Summary
provided by wikipedia EN
Dicaelus teter is a species of ground beetle in the family Carabidae. It is found in North America.
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