Calyxochaetus pictipes
Creators: name: Runyon, Justin B.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Dolichopodidae
Calyxochaetus
Calyxochaetus pictipes

description: Calyxochaetus pictipes (Harmston & Knowlton)
(Figs 107, 125, 145)
Sympycnus pictipes Harmston & Knowlton, 1940: 401.
Calyxochaetus pictipes: Pollet et al. (2004: 74).
Type material examined. HOLOTYPE ♂, labeled: “ Kanosh Cany / July 28, 1939 ”; “ G.F. Knowlton / F.C. Harmston ”; “HOLOTYPE/ Sympycnus / pictipes / n. sp. F.C.H. – G.F.K”; “ Sympycnus / pictipes H. & K./ Det. 1940 F.C. Harmston”; “Type No/ 54296/ USNM” (USNM). PARATYPE: USA: Utah: Washington County: Leeds, 1.x.1939, G.F. Knowlton & FCH (1♂, USNM).
Other material examined. USA: Arizona: Apache County: Springerville, Little Colorado River, 1.vii.1953, W.W. Wirth (1♂, USNM); Cochise County: 6 mi. W Portal, 23.vi.1968, FCH (6♂, FSCA); Southwestern Research Station, Portal, 23.vi.1968, V.D. Roth & FCH (2♂, FSCA); Garden Canyon, Huachuca Mts, 5300 ft, 16.iv.2003, JBR & RLH (2♂, MTEC); South Fork Cave Creek, N31°52.70’ W109°10.69’, 6.iv.2011, JBR (1♂, MTEC); Graham County: Twilight Spring, Pinaleno Mts, 7100 ft, 26.vi.2001, RLH & JBR (2♂, MTEC); Gila River, Safford, 25.iv.2002, RLH & JBR (4♂, 3♀, MTEC); Greenlee County: Chase Creek, Granville campground, 27.iv.2001, RLH & JBR (4♂, 3♀, MTEC); same data except, San Francisco River, Clifton (1♂, 1♀, MTEC); Pima County: Cienega Creek Preserve, N32°01.09′ W110°38.58′, 3.iv.2016, JBR (5♂, MTEC); Santa Cruz County: Madera Canyon, 14.iv.1962, P.A. Rude (1♂, 1♀, EMEC); Madera Canyon, 25.iv.2001, RLH & JBR (1♂, MTEC); Patagonia, 27.vi.1953, W.W. Wirth (1♂, USNM); Sonoita Creek near Patagonia Lake inlet, 3775 ft, N31°29.95′ W110°50.69′, 3.iv.2016, JBR (1♂, MTEC); Tubac, 29.ix.1972, FCH (2♂, FSCA). New Mexico: Catron County: Reserve, 25.vi.1968, FCH (6♂, 1♀, FSCA); Glenwood, 1.vi.1972, Malaise, W.W. Wirth (1♂, USNM); Grant County: Silver City, 25.vi.1968, FCH (5♂, FSCA); Pinos Altos, Cherry Creek, 22.vi.1953, W.W. Wirth (1♂, 2♀, USNM); Iron Creek near Wright’s Cabin campground, 32°54.8′N 107°46.8′W, 7600 ft, sweep along creek, 14.viii.2007, S.E. Brooks (1♂, CNC); Torrance County: Manzano Mts, 8 mi. W Tajique, 4th of July campground, 7500 ft, 11–12.viii.1993, J.E. O’Hara (2♂, CNC); same data except, 22.v.2013 (2♂, 3♀, CNC). Utah: Beaver County: Beaver, 19.v.1940, G.F. Knowlton & FCH (1♂, LACM); Kane County: Lick Wash narrows below Skutumpah road, 37°21′53″N 112°11′19″W, 29.v.2000, #7065, C.R. Nelson (1♂, BYU); Washington County: Leeds, 17.v.1940, G.F. Knowlton & FCH (1♂, USNM); same data except, 22.vi.1940 (1♂, USNM); Santa Clara, 19.vii.1941, G.F. Knowlton & FCH (4♂, CNC).
Diagnosis. Males can be recognized by the unmodified arista-like stylus (Fig. 107), infuscated metepimeron, and form of the mid tarsus (Fig. 125). This species is related to C. desertus and C. sobrinus (see diagnosis for C. desertus).
Redescription. Male. Wing length 2.9–3.2 mm. Similar to C. desertus except as noted: Head: Arista-like stylus (Fig. 107) unmodified, slender, evenly tapered to point, with very short microtrichia (often appearing bare). Legs: Midleg: Tarsomere 2 1.5X longer than combined length of tarsomeres 3–4. Tarsomere 5 slender, distinctly longer than combined length of tarsomeres 3–4 (Fig. 125).
Female. Wing length 2.8–3.2 mm. Similar to C. desertus except arista-like stylus with apex sharply pointed, not blunted.
Distribution and seasonal occurrence. Known from Arizona, New Mexico and Utah (Fig. 145). Adults have been collected from April to October.
description: Published as part of Runyon, Justin B., 2024, Revision of the genus Calyxochaetus Bigot (Diptera: Dolichopodidae: Sympycninae), pp. 1-74 in Zootaxa 5539 (1) on page 66, DOI: 10.11646/zootaxa.5539.1.1, http://zenodo.org/record/14240426