Calyxochaetus leptofortunatus, Runyon, 2024

Runyon, Justin B., 2024, Revision of the genus Calyxochaetus Bigot (Diptera: Dolichopodidae: Sympycninae), Zootaxa 5539 (1), pp. 1-74 : 41-43

publication ID

https://doi.org/ 10.11646/zootaxa.5539.1.1

publication LSID

lsid:zoobank.org:pub:7BDB9666-CA90-40BF-8F65-B9897CDA1F2B

DOI

https://doi.org/10.5281/zenodo.14261592

persistent identifier

https://treatment.plazi.org/id/FD1A87BF-A504-FFCF-50D3-F930FBD6FF06

treatment provided by

Plazi

scientific name

Calyxochaetus leptofortunatus
status

sp. nov.

Calyxochaetus leptofortunatus n. sp.

( Figs 81, 84 View FIGURES 77–91 , 93 View FIGURES 92–93 , 94 View FIGURE 94 )

Type material. HOLOTYPE ♂, labeled: “ Keene Valley / Essex Co. N.Y. / 1200ꞌ 20.VII.62 / J.R. Vockeroth ”; “HOLOTYPE/ Calyxochaetus / leptofortunatus /J.B. Runyon[red label]”( CNC)( Fig.93 View FIGURES 92–93 ) . PARATYPES: CANADA: Nova Scotia: Cape Breton Highlands National Park, Pleasant Bay , PG684871, 10.vii.1984, wet hardwood forest, H.J. Teskey (1♂, CNC) . Quebec: Abbotsford , 2.vii.1936, G.E. Shewell (1♂, CNC); Knowlton Lodge , 20.vii.1968, J.R. Vockeroth (1♂, CNC) . USA: Maine: Waldo County: Belfast , 2.viii.1972, FCH (1♂, FSCA). New Hampshire: Cheshire County : Mount Monadnock , 26.vii.1926, ALM (1♂, USNM) . New York: Same data as holotype (8♂, 4♀, CNC) ; Delaware County: Hancock , 3.viii.1935, H.K. Townes (1♂, AMNH); Greene County: Lanesville , 3.viii.1974, FCH (1♂, MTEC); Monroe County : Rochester , 29.vii.1972, FCH (2♂, FSCA); Yates County : Penn Yan , 30.vii.1972, FCH (1♂, FSCA) . North Carolina: Macon County: Wayah Gap, 4100 ft, 28–29.vii.1957, W.R. Richards (5♂, CNC); same data except, base of Wayah Bald , 11.viii.1957 (1♂, CNC); same data except, Wayah Bald , 29.vii.1957 (1♂, CNC) . Pennsylvania: Luzerne County: Choke Creek , 3.4 mi. SW Thornhurst, 22.vii.1991, RLH (1♂, MTEC) . Vermont: Washington County: 12 km SW Waterbury, Camel’s Hump trail , 26.viii.2001, S.E. Brooks & C.P. Chenard (1♂, CNC) . Virginia: Augusta County: Reddish Knob, 29.viii.1953, W.W. Wirth (1♂, USNM); Madison County : Shenandoah National Park , Big Meadows , 1.vii.1939, ALM (1♂, USNM); same data except, 3.vii.1930 (1♂, USNM) .

Diagnosis. This species is very similar to C. fortunatus but differs in having a narrower arista-like stylus ( Fig. 81 View FIGURES 77–91 ) and narrower fore tibia ( Fig. 84 View FIGURES 77–91 ).

Description. Male. Wing length 2.9–3.3 mm. Similar to C. fortunatus except as noted: Head: Arista-like stylus ( Fig. 81 View FIGURES 77–91 ) with smaller narrower apical lamella, with only about apical half of article 2 thickened. Legs: Foreleg ( Fig. 84 View FIGURES 77–91 ): Tibia not as strongly swollen, subequal to or slightly less than width of fore femur. Tarsomere 3 with apex slightly less broadened, with shorter dorsal microsetulae.

Female. Wing length 3.1–3.3 mm.

Distribution and seasonal occurrence. This species appears restricted to the Appalachian Mountains from Nova Scotia south to North Carolina ( Fig. 94 View FIGURE 94 ), occurring at higher elevations in the southern Appalachians. Adults have been collected in July and August.

Etymology. The specific epithet is from the Greek leptos (thin, slender) + fortunatus , in reference to this species being similar to C. fortunatus but having a thinner arista-like stylus and fore tibia.

CNC

Canada, Ontario, Ottawa, Canadian National Collection of Insects

FSCA

USA, Florida, Gainesville, Division of Plant Industry, Florida State Collection of Arthropods

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

AMNH

USA, New York, New York, American Museum of Natural History

MTEC

USA, Montana, Bozeman, Montana State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Dolichopodidae

SubFamily

Sympycninae

Genus

Calyxochaetus

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