Ctenanthidium nigripes Urban, 1993

Parizotto, Daniele R. & Urban, Danúncia, 2013, Contribution to the knowledge of the Anthidulum Michener and Ctenanthidium Urban (Hymenoptera, Apidae) with new species from Argentina and Peru, Zootaxa 3609 (3), pp. 311-318: 316-317

publication ID

http://dx.doi.org/10.11646/zootaxa.3609.3.5

publication LSID

lsid:zoobank.org:pub:FF629A16-3BF8-4399-896C-4067C89B10B7

persistent identifier

http://treatment.plazi.org/id/3B0087DD-8C7D-043A-D3BA-BC56EB85D096

treatment provided by

Plazi

scientific name

Ctenanthidium nigripes Urban, 1993
status

 

Ctenanthidium nigripes Urban, 1993 

( Figs. 11 –12View FIGURES 1 – 12, 23View FIGURES 22 – 26)

The original description of this species was based on a single female from Bolivia, Potosi. The male described below is from Bolivia, Cochabamba.

Comments and diagnosis. Integument of mesoscutum smooth, with two anterior yellow bands; each side of vertex with one yellow spot ( Fig. 12View FIGURES 1 – 12). Female: metasoma with yellow bands on T 1, T 3 -T 5 ( Fig. 21View FIGURES 13 – 21). This species is very similar with C. argentinum  differing by the metasoma with shallower, smaller and sparser punctures. Ctenanthidium nigripes  also differs by the presence of only two yellow bands on metasoma while C. argentinum  has the metasoma with four yellow bands.

Description male. Approximate body length 6.1 mm; forewing length 5.2 mm; head width 2.0 mm; eye length 1.3 mm. Color: Integument black except yellow as follows: mandible except teeth and margins; clypeus with subapical macula, wider at middle; supraclypeal area with U-shaped macula including juxtantennal carina; lower paraocular area, narrowing near antennal sockets. One spot on each side of vertex, behind eyes. Antenna with scape, pedicel and first two basal segments amber; pedicel blackened dorsally ( Fig. 11View FIGURES 1 – 12). Mesoscutum with an anterior band on each side, wider near middle; axilla and scutellum with subapical band and translucent margin. Tegula amber, wing membrane blackened, veins black, darker at base and at costal margin ( Fig. 12View FIGURES 1 – 12). Legs with coxae, trochanters and basal half of femora blackened; fore leg with femur amber on external surface and apex; middle and hind legs with apices of femora, tibiae and tarsomeres amber. Terga black; T 1 with large yellow band, slightly narrow at middle; T 2 with yellow lateroventral macula; T 3 -T 5 with discal yellow band, distal half of terga yellowish amber with translucent margin, larger on T 3; T 6 -T 7 with marginal yellow band ( Fig. 23View FIGURES 22 – 26). S 1 with lateral spots; S 2 with apical half yellow and stained by two discal black spot; S 3 with two large lateral yellow spots and translucent medial margin.

Pilosity. Predominantly white, hairs longer than ocellar diameter, sparser and longer on paraocular area, clypeal apex, scutellar apex, sides of terga, sterna and legs. Second and third sterna with apical fringe of plumose hairs laterally.

Punctures. Head and mesosoma densely punctate; punctures on metasoma shallower and sparser than in mesosoma. Punctures of first and second terga sparser and smaller than in the remaining terga.

Material examined. One male: “ BOLIVIA, Cochabamba:/ Peña Colorada, 1800m./ February 21,1976/ L. E. Peña” (AMNH); ARGENTINA: one male, Jujuy, Tumbaya, II/ 84, Fritz; one male and one female from Salta, El Maray, I/ 94, Fritz (AMNH); one female from Salta, Cuesta, Obispo, II/ 85 (AMNH); one male and one female from Salta, Chorrillos, III/ 93 (AMNH); one male from El Alisal, III/ 93 (DZUP) and one female from El Alisal III/ 94, Fritz, (DZUP).

Variation. In the other males examined following variations in the supraclypeal area were noted: the specimen from El Alisal has a U-shaped macula, including the juxtantennal carina; the male from El Maray has a yellow spot near the epistomal sulcus; the male from Tumbaya has a small yellow band near the epistomal sulcus. Females differ from holotype by having larger ferruginous areas.

Key to the species of Ctenanthidium 

1 Mesoscutum dull, with dense microreticulation between punctures............................................... 2

- Mesoscutum shiny and smooth between punctures........................................................... 3

2 Mesoscutum black. Female: metasoma with yellow bands on T 1 and T 3 only; T 2 with sparse punctures on disc, punctures separated by a puncture diameter ( Fig. 20View FIGURES 13 – 21)......................................................... C. bifasciatum 

- Mesoscutum with yellow maculae. Female: metasoma with yellow bands on T 1, T 3 -T 5, respectively; T 2 with dense punctures on disc, punctures separated by half of a puncture diameter ( Fig. 21View FIGURES 13 – 21)................................ C. gracile Urban 

3 Tegula with sparse and shallow punctures laterally, smooth on disc ( Fig. 16View FIGURES 13 – 21). Head and mesosoma black with yellow and orange maculations ( Figs. 8–9View FIGURES 1 – 12). Mesoscutum with a reversed L-shaped maculae, yellow dorsally and ferruginous laterally ( Fig. 13–14View FIGURES 13 – 21). Female: labrum with thickened subapical hairs ( Fig. 10View FIGURES 1 – 12)........................... C. versicolor  sp. nov.

- Tegula with dense and deep punctures on sides, smaller and sparser on the disc ( Fig. 15View FIGURES 13 – 21). Head and mesosoma black with yellow maculae, sometimes with a small ferruginous spot behind eyes ( Fig. 11–12View FIGURES 1 – 12). Female: labrum with apical hairs......... 4

4 T 2 -T 3 with shallow, small and sparse punctures, distance between punctures as wide as half of puncture diameter. Female: metasoma with yellow bands on T 1, T 3 -T 5 ( Fig. 21View FIGURES 13 – 21). Male: sides of mesepisternum with long plumose hairs (> 2 PD)............................................................................................ C. nigripes Urban 

- T 2 -T 3 with deep, bigger and dense punctures, distance between punctures less than a half of puncture diameter. Female: metasoma with yellow bands on T 1 and T 3 only ( Fig. 19–20View FIGURES 13 – 21). Male: sides of mesepisternum with short plumose hairs (≤ 1.5 PD).................................................................................... C. argentinum Urban