Habropoda pierwolae, Tran & Engel & Michael S., 2025

Tran, Ngat Thi, Engel, & Michael S., 2025, A contribution to the knowledge of Habropoda from Vietnam (Hymenoptera: Apidae), Raffles Bulletin of Zoology 73, pp. 125-152 : 132-137

Habropoda pierwolae , new species

( Figs. 5–8 )

Type material. Holotype. VIETNAM: female, Gia Lai Province, Kbang District , SƠn Lang Commune, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, Ngát Thị Trần, 26.iv.2016 [ IEBR] . Paratypes. VIETNAM: 1 female, 2 males, same data as type [1 male in IEBR; 1 female, 1 male in AMNH] ; 1 female, Qu ảng Nam Province, Nam Giang District, Chà Vàl Commune , alt. 400–600 m, coll. Department of Insect Systematics, 29.iv.2005 ; 1 male, Kon Tum Province, Đắk Glei District, Đ ắk Choong Commune, Ng ọc Linh Natural Reserve , 15°11.9′N, 107°47.6′E, alt. 1064 m, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, PhƯỢng Minh Nguyễn, 9.iv.2015 ; 2 females, 1 male, Gia Lai Province, Kbang District, SƠn Lang Commune, Kon ChƯ Răng Natural Reserve , 14°43′48.9″N, 108°29′22.2″E, alt. 866 m, coll. Liên Th ị PhƯƠng Nguyễn, Lam Xuân TrƯƠng, Tuấn Viết LƯƠng, 5.v. 2018 ; 1 male, Đắk Lắk Province, Krông Bông District, Krông Kmar Town, ChƯ Yăng Sin National Park , 12°25′18.4″N, 108°17′49.4″E, alt. 1052 m, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, Ngát Thị Trần, 3.v.2016 ; 7 females, Đắk Lắk Province, Krông Bông District, Krông Kmar Town, ChƯ Yăng Sin National Park , 12°25′02.8″N, 108°22′30.8″E, alt. 1081 m, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, Ngát Thị Trần, 4.v.2016 ; 2 females, Đắk Lắk Province, Krông Bông District, Krông Kmar Town, ChƯ Yăng Sin National Park , 12°27′05.3″N, 108°20′24.3″E, alt. 744 m, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, Ngát Thị Trần, 5.v.2016 ; 1 female, 1 male, Lâm Đ ồng Province, Đà L ạt City, Bidoup Núi Bà National Park , 12°10′56.7″N, 108°40′47.9″E, alt. 1458 m, coll. Liên Th ị PhƯƠng Nguyễn, Đại Đắc Nguyễn, Ngát Thị Trần, 7.v.2016 [ IEBR].

Diagnosis. Discal setae of terga of female dark brown to black; apical fimbrial bands of female terga I–IV bright yellow; flagellomere I of male at most as long as flagellomere II; flagellum of male except flagellomere I light brown ventrally; sternum VII of male not expanded medially nor hatchet-shaped, tapering slightly from midlength to apical margin with broad medioapical lobe; sternum VIII of male with lateral margins of disc almost straight, converging to apical margin with broad medial concavity between to apical angles, concavity with minute, bluntly rounded lobe.

Description. Female: Total body length 11–11.5 mm (holotype = 11.5 mm), forewing length 9–9.5 mm (holotype = 9.5 mm). Body robust ( Fig. 5A–B ). Head broader than long, about 1.4× as broad as long. Compound eyes large and bulging. Clypeus strongly convex in profile, broader than long, about 1.5× as broad as long ( Fig. 6A ). Labrum subrectangular, 1.6× as broad as long, with relatively small, shallow medio-apical emargination ( Fig. 6B ). Mandible bidentate and relatively round apically. Scape slender, approximately 3.8× as long as broad, flagellomere I longest, flagellomere II shortest, length of flagellomere I approximately 2.2× flagellomere II, flagellomere III little longer than flagellomere II, flagellomeres IV–IX subequal in lengths, flagellomere X longer than individual lengths of flagellomeres IV–IX ( Fig. 6C ). Forewing subhyaline, with three submarginal cells, first and third submarginal cells broader than second submarginal cell, 1m-cu entering near apex of second submarginal cell ( Fig. 6E ). Metasoma bulge, heart-shaped ( Fig. 6F ). Pygidial plate with lateral margins gradually narrowed to basal ⅔, then slender on remaining part and apex nearly rounded ( Fig. 6G ).

Clypeus with dense uniform punctures basally, and wrinkled dense punctures baso-laterally, punctures separated by 0.2–1× puncture width, except on medio-central area of clypeus disc and on yellow maculation, where punctures are shallow, very sparse forming an impunctate longitudinal line medially; supraclypeal area with dense punctures separated by 0.2–1× puncture width ( Fig. 6A ); labrum with dense, contiguous, coarse, wrinkled punctures ( Fig. 6B ); paraocular area with round, smaller, dense punctures separated by 0.2–1× puncture width; frons and vertex with round, minute, dense, nearly contiguous punctures; the impunctate area next to lateral ocelli much small, almost non-existent ( Fig. 6D ). Mesoscutum and mesoscutellum with round, dense, nearly contiguous punctures, size of punctures larger than those on frons. Metasomal terga with round, small, relatively dense punctures separated by a puncture width, size of punctures smaller than those on mesoscutum.

Body black except as follows: mandible yellowish except by the medial ⅓ and apical edge light brown to black; labiomaxillary complex ferruginous; clypeus brown except T-inverted yellow medio-apical maculation; supraclypeal area brown ( Fig. 6A ); antenna brown to dark brown except flagellomeres I–II brownish black ( Fig. 6C ); legs brown; sterna dark brown except amber apical margins.

Setae on body plumose except for simple setae mostly found on clypeus, labrum, and discs of terga II– IV. Clypeus with short, sparse, yellow setae except longer, scattered, blackish plumose setae basolaterally and dense, yellowish plumose setae apicolaterally. Labrum with yellow setae, setae longer and denser than those on clypeus. Paraocular area with short, dense, yellowish setae, above antennal torulus with longer, yellowish setal tuft. Frons with dense, yellowish intermixed blackish setae. Inner space between ocelli with dense, blackish setal tufts and inter space between ocelli and vertex with yellow setae intermixed with blackish setae ( Fig. 6A ). Vertex with long, blackish setae ( Fig. 6D ). Occiput with long, dense, yellowish to yellow setae. Gena from below compound eye to mid-height of eye with long, dense, yellowish setae, and from there up to near top of eye with yellow setae intermixed with blackish setae. Mesoscutum and mesoscutellum with yellow setae intermixed blackish setae ( Fig. 6D ). Tergum I with long, dense, yellow plumose setae; terga II–IV with short, dense, dark brown or black setae except apical margins with dense, bright yellow plumose setal bands, tergum V with dense, yellowish brown plumose setal band apically ( Fig. 6G ).

Male. Total body length 9.5–10 mm, forewing length 7.5–8 mm. Mandible bidentate, preapical tooth with blunt apically, apically tooth with relatively round apically, apical tooth little longer than preapical tooth ( Fig. 7B ); scape approximately 2.2× as long as broad, flagellomere I as long as flagellomere II, flagellomeres III–X subequal in lengths, flagellomere XI about 1.5× length of flagellomere III ( Fig. 7C ); tergum VII with apical margin slightly curved ( Fig. 7F ). Sterna IV–VIII as in Fig. 8A–E . Male gonostylus with the dorsal process long, expanded gradually from base to apex, broad and round apically with long setal tuft, and the ventral process obovate in shape, with dense setae ( Fig. 8F, G ).

Sculpturing as described for female except punctures of clypeus scattered and fainter.

Integument black except labiomaxillary complex dark ferruginous; mandible yellowish except brown to brownish black apically; clypeus yellowish except teardrop-shaped black stain medio-laterally (sloping from anterior tentorial pit) and black at lateral borders, apical margin brown ( Fig. 7A ). Supraclypeal area with thin, yellowish crescent mark bordering sulcus ( Fig. 7A ). Scape and flagellomeres II–XI ventrally dark brown ( Fig. 7C ). Legs brown to dark brown, pretarsal claws black apically.

Pubescence generally a little paler on male than in female ( Fig. 5C, D ); terga I–IV with thinner setal bands apically than those of female ( Fig. 7E ).

Distribution. Vietnam (Central and Central Highlands).

Remarks. In this species males have gonostyli identical to those of H. sinensis illustrated by Lieftinck (1974: fig. 3) and Wu (2000: fig. 178c), and with sternum VIII as depicted by Wu (2000: fig. 178b), but differs from the drawing presented by Lieftinck (1974: fig. 2). Sternum VII of the new species is also very different from the sketches presented by both Lieftinck (1974: fig. 2) and Wu (2000: fig. 178a), particularly in that the disc of sternum VII is broader or more hatchet-shaped in H. sinensis , while in the new species the disc is narrower, with margins converging less abruptly apically and not expanded horizontally (i.e., not hatchet-shaped).

Etymology. The specific epithet honors Ms. Agnieska Pierwola, multi-talented, vibrant, and astute entomologist of the AMNH who has been an unflagging source of support and inspiration for our work on bees.

Floral association. Unknown.

Figures

Fig. 5. A–D, Habropoda pierwolae, new species, female and male; A, lateral habitus, female; B, dorsal habitus, female; C, lateral habitus, male; D, dorsal habitus, male. Scale bars = 1.0 mm.

Fig. 6. A–G, Habropoda pierwolae, new species, female; A, head, frontal view; B, labrum and mandible, frontal view; C, left antenna; D, head and mesosoma, dorsal view; E, left wing; F, metasoma, dorsal view; G, pygidial plate, dorsal view. Scale bars = 1.0 mm (A, C–F), 0.5 mm (B, G).

Fig. 7. A–F, Habropoda pierwolae, new species, male; A, head, frontal view; B, labrum and mandible, frontal view; C, left antenna; D, head and mesosoma, dorsal view; E, metasoma, dorsal view; F, metasomal terga VI–VII, dorsal view. Scale bars = 1.0 mm (A, C–E), 0.5 mm (B, F).

Fig. 8. A–G, Habropoda pierwolae, new species, male; A, metasomal sternum IV; B, metasomal sternum V; C, metasomal sternum VI; D, metasomal sternum VII; E, metasomal sternum VIII; F, genitalia, dorsal view; G, genitalia, ventral view. Scale bars = 1.0 mm (A, B), 0.5 mm (C–G).