Andinopanurgus lynnae Packer, 2021

Packer, Laurence, 2021, Two new species of Andinopanurgus (Hymenoptera: Andrenidae: Panurginae), with a description of the female of A. amyae, Journal of Melittology 2021 (101), pp. 1-19 : 5-11

Andinopanurgus lynnae Packer , new species

ZooBank: urn:lsid:zoobank.org:act:0325CDA1-C217-48BC-8316-D386B243BEE1

( Figs. 9–15 , 23 , 24 )

DIAGNOSIS: Males of the new species can be differentiated from all other bees by the combination of unusual setal structure on S4 ( Figs. 11–12 ) and a white transverse marking on the clypeus ( Fig. 10 ). Only A. chirosimpson has similarly unusual setae on S4 ( Figs. 4–5 ) with short, thick forked setae, but that species has an entirely black clypeus ( Fig. 2 ). The setal paterns are also different between the species (compare Figs. 4–5 with Figs. 11–12 ). The female has the following combination of character states that is unique among known females of the genus: antennal flagellum not crenulate, F1 clearly longer than F2 ( Fig. 14 ), metatibia with white scopal hairs ( Fig. 13 ), mesotibial spur as long as mesobasitarsus ( Fig. 15 ), and pro- and mesotibiae lacking basodorsal pale mark ( Fig. 13 ). It shares all but the last two features with A. vargasllosai Gonzalez & Alvarado which has the mesotibial spur 0.8× as long as the mesobasitarsus and pale marked pro- and mesotibiae. An additional difference between females of A. lynnae and A. vargasllosai is the length to width of the facial fovea,>5: 1 in A. lynnae versus 3.7: 1 in A. vargasllosai .

DESCRIPTION: ♂: Body length 5.4 mm, forewing length 4.2 mm, head width 1.42 mm., intertegular distance 0.85 mm.

Coloration. Black to blackish-brown except as follows: dark red-brown on mandible, labrum, epistomal lobe, legs (except as noted below) and metasoma (except as noted below); orange-brown on pronotal lobe, apical impressed areas of metasomal terga; pale yellow-brown apicosubmedially on S6 and ventrally on F3–F11, area of flagellomere that is pale increasing from small subapical spot on F3 to entire ventral surface on F6–F10, F11 dark apicoventrally; lateral reflexed portions of metasomal terga and apical impressed areas of S1–S6 translucent pale brown; pale cream subapical transverse band on clypeus. Following parts yellow: narrow longitudinal stripe on protibia (absent for apical 1/5 th), small basodorsal spot on mesotibia. Wing veins dark brown to level of base of stigma, remaining veins and stigma pale brown; membranes very pale yellow-brown.

Pubescence. Minute simple suberect hairs on mesoscutum, scutellum, metanotum and metasomal dorsum. Longer hairs pale brown erect with numerous short branches and sparse unless stated otherwise; longest ≈3 MOD basoventrally on mandible, lower paraocular area (hairs blackish along inner margin of compound eye), gena below (becoming shorter ≈1 MOD and dark brown above), scape, mesoscutum, scutellum, mesopleuron and profemur; ≈2 MOD on vertex posteriorly, mesosomal venter, and metafemur; short, less plumose and blackish on frontal and vertexal areas; 1.5 MOD on dorsolateral portion of propodeum. Metasoma hairs with branches mostly only on anterior surface of rachis <1.5 MOD, longest on side of T 3; T 7 with whitish plumose apicomedially oriented dense hair patch ≈1 MOD; sterna with short subapressed hairs <1 MOD, S1–S3, S5, and S6 with somewhat denser more erect hairs towards apex; S4 with highly modified setae, divided into two, three, five, or six branches.

Surface sculpture. Body surface dull due to microsculpture except absent surface shiny on labrum, epistomal lobe and tegula and weak on apical impressed areas of metasomal terga and sterna; imbricate and somewhat shiny on face below antennal sockets, genal area below, lower half of metapleuron, metapostnotum, sides of propodeum and metasoma; coarsely imbricate on upper paraocular area, lower parts of frontal area, mesoscutum and metanotum; coarsely imbricate on upper part of frontal and on vertexal areas and mesopleuron. Macrosculpture: punctures shallow and obscure, on clypeus large, i=1–4d; on supraclypeal area small, almost absent on disc, i~d towards lateral margin; on subantennal sclerite small, irregularly spaced i=0.5–5d; lower paraocular area punctures irregular in size, i=1–2d; upper paraocular, frontal and vertexal areas punctures obscure among coarse microscupture, i=0.5–5d; mesoscutum punctures small, i=1–8d; scutellum punctures larger, i=0.2–3d; metanotum punctures obscure; hypoepimeral area densely punctate i~d; rest of mesopleuron punctures small, more distinct, i=2–5d; upper part of metapleuron longitudinally striate; lateral surface of propodeum impunctate below, sparsely punctate above i=2–4d; metapostnotum weakly and sparsely striate. Metasoma obscurely punctate, punctures increasingly distinct on more apical terga, on T 6 i>4d on disc, i>2d towards sides; T 7 i>d; sternal punctures minute and sparse on disc, increasingly large and dense towards apex of each sternum and from S1–S5, on S2 i>2d apically, on S5 i≥d; S6 almost impunctate.

Structure. Head shorter than wide (67:73); labrum less than twice as wide as long (20:13), basal box surface concave, apically strongly ridged, sides strongly convergent, apical margin feebly convex; labial palpomeres 1–4: 12:10:10:7; clypeus more than twice as wide as long (80:37); interantennal distance considerably greater than antennocular distance (34:20); malar area linear; supraclypeal area angularly raised just below lower antennal socket tangent; anterior tentorial pit at junction of outer subantennal and epistomal sulci; epistomal lobe swollen ≈135˚; compound eye ≈1.6× as long as wide (78:48), wider than genal area in lateral view (31); inner margin of compound eyes weakly concave above, strongly convergent below, upper to minimum to lower interocular distances (73:50:57); inner and outer subantennal sutures outwardly concave, subantennal sclerite widest above midlength 1.5× antennal socket diameter (15:10); frontal line weakly raised except depressed just above bluntly rounded process above lower tangent of antennal sockets; facial fovea distinct, oval 2.5× as long as wide (7.5:3); interocellar distance less than half ocellocular distance (17:37); vertex swollen behind compound eyes, mostly transverse, weakly convex medially in frontal view; flagellum longer than width of head (88:73); flagellum unmodified, not crenulate; F1 almost twice as long as wide (17:9); remaining flagellomeres with length and width subequal except F11 almost twice as long as wide (23:12).

Mesoscutum slightly shorter than intertegular width (39:42), median line more than half length of mesoscutum, distinct, ending in small oval deep depression; parapsidal line ≈1/2 as long as tegula (10:20); scutellum:metanotum:metapostnotum (27:14:20); legs unmodified, posterior metatibial spur more strongly curved than anterior spur and mesotibial spur, ciliate; inner and outer rami of tarsal claws subequal in length, claws bifid; posterior margin of first submarginal cell longer than second (28:24); both recurrent veins entering second submarginal cell, first further from first submarginal cross vein than second is from second submarginal crossvein (6:4); stigma almost 4× longer than maximum width (30:8); marginal cell ≈3.5× longer than maximum width (43:12), apex truncate.

T 1 shorter than apical width (40:52); apical impressed areas gradually depressed from disc, on T 2 shorter than MOD (7.5:10); T 2 lateral fovea weak, elongate, L:W (8:3) T 2– T 4 narrowly and weakly transversely depressed anteriorly; T 7 apex concave; S1–S5 unmodified, S6 apically narrowly concave apicomedially; S8 apical lobe weakly laterally expanded before rounded apex; gonostylus obliquely flatened, gradually narrowing to acute apex [genitalia not dissected in the sole known specimen].

♀: Body length 5.95 mm, forewing length 4.6 mm, head width 1.52 mm., intertegular distance 1.02 mm.

Coloration. Black to blackish-brown except as follows: red-brown on apex of mandible pronotal lobe, tegula, legs (suffused with blackish), apical impressed areas of metasomal terga, area anterior to impressed area on T 3 and T 4, most of T 5, metasomal sterna (except apical impressed areas pale amber); ventral surface of F5–F10 pale orange-brown, pale area increasing in size from F5 to F9, F11 apex brown.

Pubescence. Minute simple suberect hairs on mesoscutum, scutellum, metanotum, and metasomal dorsum. Longer hairs pale brown erect with numerous short branches and sparse unless stated otherwise; longest ≈3 MOD on medial surface of scape and mesopleuron; ≈2.5 MOD basoventrally on mandible, genal area below (becoming shorter ≈1.5 MOD above), scutellum and apicoventrally on profemur, metacoxa; <2 MOD on lower paraocular area, vertexal area (where some hairs dark brown), mesoscutum, legs; shorter ≤1.5 MOD on metanotum and dorsolateral area of propodeum, ≤1.5 MOD and less plumose on frontal and vertexal areas. Metatibial scopal hairs mostly simple, long <4 MOD. Metasomal tergal hairs with branches mostly only on anterior surface of rachis ≤1 MOD, except towards sides, prepygidial fimbria and T 6, plumose, longest on side of T 5 ≤2.5 MOD, prepygidial fimbria and T 6 hairs brown, ≤2 MOD and ≤1.5 MOD respectively; metasomal sternal hairs mostly with branches only on anterior surface of rachis, increasing in length from anterior to posterior on each sternum, longest hairs <2 MOD; S5 with apical fringe of white appressed hairs ≈1.5 MOD.

Surface sculpture. As in male except microsculpture generally weaker throughout; macrosculpture: punctures shallow and obscure, on clypeus large, i=1–5d; on supraclypeal area smaller, i=2–6d on disc, i≈d towards lateral margin; on subantennal sclerite small, irregularly spaced i≈d; lower paraocular area punctures irregular in size, i=1–6d; upper paraocular and frontal area punctures obscure, vertexal area i≥d; mesoscutum and scutellum punctures bimodal in size, minute punctures i>d, larger punctures sparse; metanotum obscurely punctate; hypoepimeral area puncate-imbricate; rest of mesopleuron sparsely punctate i>3d; upper part of metapleuron longitudinally weakly striate; side of propodeum impunctate below, sparsely punctate above i>3d; metapostnotum with few longitudinal striae. Metasomal terga sparsely minutely punctate except T 5 i=2–5d on disc, i≈d subapically.

Structure. Head shorter than wide (69:76); labrum ≈1.5× as wide as long (23:16), basal box surface concave, apically strongly ridged, sides strongly convergent, apical margin feebly convex, ridge U-shaped; [first labial palpomere almost as long as remaining three combined, labial palpomeres 1–4: 24:9:8:7.5]; clypeus <2.5× as wide as long 48:21; interantennal distance slightly less than antennocular distance (18:21); malar area linear; supraclypeal area shallowly convex in profile; anterior tentorial pit just above junction of outer subantennal and epistomal sulci; epistomal lobe swollen ≈160˚; compound eye <2× as long as wide (71:37), wider than genal area in lateral view (30); inner margin of compound eyes weakly concave above, strongly convergent below, upper to minimum to lower interocular distances (95:78:88); inner subantennal sulcus straight, outer subantennal sulci outwardly weakly concave, subantennal sclerite widest above midlength, ≈ antennal socket diameter (11:11); frontal line very short, weak; facial fovea distinct, parallel-sided, elongate ≈5× as long as wide (24:5), widest just below upper extremity; interocellar distance ≈0.5× ocellocular distance (19:36); frontal area weakly depressed above antennal sockets and below median ocellus, upper paraocular area weakly depressed; vertex swollen behind compound eyes, transverse in anterior view; flagellum length subequal to head width; F1 more than twice as long as wide (19:7); remaining flagellomeres with length and width subequal except F11 ≈1.5× as long as wide (20:13).

Mesoscutum shorter than intertegular width (70:83), median line more than half length of mesoscutum; parapsidal line 1/2 as long as tegula (10:20); scutellum:metan otum:metapostnotum (30:15:22); legs unmodified, mesotibial spur straight, as long as mesobasitarsus, with three long teeth, almost as long as mesobasitarsus (43:46); metatibial spurs strongly sclerotized, anterior spur more strongly curved and less weakly serrate than posterior one; tarsal claws with long tooth arising at or before midlength; posterior margin of first submarginal cell slightly longer than second (54:51); both recurrent veins entering second submarginal cell, first ~ twice as far from first submarginal cross vein than second is from second submarginal crossvein (15:8); stigma ≈4× longer than maximum width (53:13); marginal cell ≈4.5× longer than maximum width (49:13), apex truncate.

T 1 apical width ≈1.5× length (63:43); apical impressed areas distinct, on T 2 1.5× MOD; [ T 2 lateral fovea distinct, elongate, L:W 27:6, acutely narrowed anteriorly]; T 2– T 4 not noticeably transversely depressed anteriorly; pygidial plate weakly convex laterally, sides forming angle of ≈45˚, apex rounded, surface raised medially sides of raised area concave; S6 with glabrous thickened apical lip, apex weakly convex.

TYPE MATERIAL: ♂, PERU, Cusco, Picol , 3782m, 12.ii.2005, L.S. Kimsey, malaise trap; allotype and second female paratype, same data as holotype. All specimens will be housed at the R. M. Bohart Musem of Entomology, University of California , Davis.

ETYMOLOGY: The specific epithet honours two people, Lynn Sophie Gail Quesney, the author’s grandaughter, and Lynn Kimsey, the well known hymenopterist who collected the only known specimens of the species.

COMMENTS: The setation on S4 of the male is unique, though clearly shares some features with A. chirosimpson described above.

The female seems, superficially at least, similar to that of A. vargasllosai .

Figures

Figure 23. Andinopanurgus lynnae, new species, female, oblique ventral view of head to show straight hypostomal carina (scale bar = 0.5mm).

Figure 24. Map showing the known localities for all Andinopanurgus species. Data taken from Gonzalez & Ruz (2007), Gonzalez & Engel (2011), Gonzalez et al. (2013, 2019), and herein. The circles for two species (A. amyae (Gonzalez & Engel) and A. guarnensis (Gonzalez & Ruz)) are somewhat larger than for the others to encompass multiple localities in moderately close proximity. The symbols for A. lynnae, new species, and A. vargasllosai Gonzalez & Alvarado and the southern two symbols for both A. bachue (Gonzalez & Ruz) and A. rangeli (Gonzalez & Ruz) are slightly further apart than they should be to facilitate visualization.

Figures 9–12. Andinopanurgus lynnae, new species, holotype male, light photomicrographs unless stated otherwise. 9. Lateral habitus (scale bar = 1 mm). 10. Head anterior view (scale bar = 1 mm). 11. ESEM of part of S4 to show unique setal structure (scale bar = 300 μm). 12. ESEM of a single five-branched seta from S4 (scale bar = 50 μm).

Figures 13–15. Andinopanurgus lynnae, new species, allotype female. 13. Lateral habitus (scale bar = 1 mm). 14. Head anterior view (scale bar = 0.5 mm). 15. Part of midleg to show length of mesotibial spur and its teeth (scale bar = 0.5 mm).

Figures 1–8. Andinopanurgus chirosimpson, new species, holotype male, light photomicrographs unless stated otherwise. 1. Lateral habitus (scale bar = 1 mm). 2. Head anterior view (scale bar = 1 mm). 3. Apex of T7 to show straight and densely setose apical margin (scale bar = 0.5 mm). 4. ESEM of part of S4 to show unique setal structure (scale bar = 300 μm). 5. ESEM of a single seta from S4 (scale bar = 50 μm). 6. S7 ventral view (scale bar = 0.25 mm). 7. S8 dorsal view (scale bar = 0.25 mm). 8. Genital capsule dorsal view (scale bar = 0.25 mm).