taxonID	type	description	language	source
740A87AE7F3BB829D2DFFE8647EDF922.taxon	diagnosis	Diagnosis. Female. (cf. B. weisi s. l.) Metasomal T 2 in the middle between the pits (with hair bases) with the surface strongly sculptured, irregular and dull. Short hair between the antennal base and the ocelli predominantly yellow; hair of the thoracic dorsum usually anteriorly with a transverse yellow band; metasomal T 3 entirely yellow; hind basitarsus posterior long fringe with at least the tips orange. Male. (cf. B. weisi s. l.) Genitalia with the gonostylus shorter than long, rectangular, with the inwardly projecting inner basal process strongly sclerotised for a length less than half of the breadth of the volsella (Fig. 4); volsella distally (posteriorly) beyond the gonostylus strongly narrowed or constricted proximally to the inner distal process; penis-valve head distally (posteriorly) slightly pointed and slightly incurved towards the midline. Hair of metasomal T 3 laterally yellow without a distinct lateral patch of black.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB829D2DFFE8647EDF922.taxon	description	Description. Female. Queen body length 15 ‒ 17 mm, worker 13 mm. Head with the oculo-malar area length / breadth ratio 1.6. Thorax with the mid basitarsus distal posterior corner acutely and spinosely pointed. Hair long, uneven, and black; on the head above the antennal socket the shorter hair yellow; pronotum and anterior scutum either often yellow, forming a transverse band connected with the yellow hypoepimeral area, or this band reduced with black in some queens and most workers; scutellum posteriorly with a yellow fringe, which may be much reduced with black; lateral propodeum yellow; hind tibia with the ends of the corbicular fringes and on the hind basitarsus orange-brown; all leg bases and hind femur with yellow ventrally; metasomal T 1 ‒ 3 entirely yellow; T 4 black, with a narrow medial posterior fringe of rufous orange; T 5 black anteriorly and in the posterior half orange; T 6 orange. Male. Body length 11 ‒ 13 mm. Hair long, uneven, and black; mandibular ventral fringe with long curved hair black; face with many mixed short hair yellow; pronotum and anterior scutum either yellow, forming a transverse band connected with the yellow hypoepimeral area, or often this band reduced with black; mesepisternum, hypoepimeral area and metepisternum with yellow; lateral propodeum yellow; hind tibia with dorsal fringe longer than the breadth of the tibia; hind basitarsus with keirotrichia entirely orange; metasomal T 1 ‒ 3 yellow; T 4 ‒ 5 posterior fringe often mixed with yellow; T 6 in the posterior half with orange; T 7 entirely orange; sterna with long pale hairs on posterior fringes but S 6 short and orange. Genitalia shown in Fig. 4.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB829D2DFFE8647EDF922.taxon	materials_examined	Material examined. ECOSUR: 596 specimens. Data and barcodes for specimens from Figs 2 ‒ 3 are available from https: // www. ecosur. mx / beesofmesoamerica / and barcodes are available from a Supplementary File.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB829D2DFFE8647EDF922.taxon	distribution	Distribution. Bombus nigrodorsalis is endemic to Mexico (Fig. 6), distributed from Chihuahua in the north (29.189 ° N) to Oaxaca in the south (16.149 ° N). It is absent south of the Tehuantepec Isthmus and from beyond Mexico. The altitudinal range is 2000 – 3634 m asl, in areas with pine forest. This species has been collected from July to January, with only two queens collected in April and June. Males were collected from late September to mid-January. Bombus nigrodorsalis is broadly sympatric with B. weisi in some regions of Mexico, but within those regions B. nigrodorsalis is present at higher elevations and has a geographical range that extends further to the north.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB828D2DFF8BD46ACFA9B.taxon	diagnosis	Diagnosis. Female. (cf. B. nigrodorsalis s. str.) Metasomal T 2 in the middle between the large pits (with hair bases) with the surface weakly sculptured, smooth and shining. Short hair between the antennal base and the ocelli black; hair of the thoracic dorsum usually anteriorly black, at most with a minority of yellow hairs intermixed in a weak transverse band; metasomal T 3 usually yellow at least medially but black laterally; hind basitarsus posterior long fringe black. Male. (cf. B. nigrodorsalis s. str.) Gonostylus as long as broad, triangular, with the inwardly projecting inner basal process strongly sclerotised for a length as much as the breadth of the volsella (Fig. 5); volsella distally (posteriorly) remaining broad and nearly parallel-sided throughout its length beyond the gonostylus; penis-valve head distally straight with the tip rounded. Hair of metasomal T 3 with at least a distinct small lateral patch of black.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB828D2DFF8BD46ACFA9B.taxon	description	Description. Female. Queen body length 15 ‒ 17 mm, worker 10 ‒ 12 mm. Head with the oculo-malar area length / breadth ratio 1.3. Thorax with the mid basitarsus distal posterior corner acutely and spinosely pointed. Hair long, uneven, and black; pronotum and anterior scutum either sometimes with yellow intermixed, forming a weak transverse band connected with the yellow hypoepimeral area, or more usually this band reduced or replaced with black; scutellum posteriorly with a weak yellow fringe, which may be much reduced with black; lateral propodeum yellow; legs including bases, femora, and corbicular fringes black. Male. Body length 11 ‒ 13 mm. Hair long, uneven, and black; mandibular ventral fringe with long curved hair brown; vertex and occiput sometimes mixed with yellow; pronotum and anterior scutum either yellow, forming a transverse band connected with the yellow hypoepimeral area, or often replaced with black; mesepisternum, hypoepimeral area and metepisternum with yellow; lateral propodeum yellow; leg bases and femora sometimes partly yellow; metasomal T 1 ‒ 2 yellow; T 3 yellow, but always with patches of black at least at the sides; T 6 at least with a posterior orange fringe; T 7 entirely orange. Genitalia shown in Fig. 5.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB828D2DFF8BD46ACFA9B.taxon	materials_examined	Material examined. ECOSUR: 1195 specimens. Data and barcodes for specimens from Figs 2 ‒ 3 are available from https: // www. ecosur. mx / beesofmesoamerica / and barcodes are available from a Supplementary File.	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
740A87AE7F3BB828D2DFF8BD46ACFA9B.taxon	distribution	Distribution. Bombus weisi is distributed from Durango, Mexico (northernmost point 23.723 ° N) south to San José, Costa Rica (southernmost point 9.369 ° N), occurring on both sides of the Tehuantepec Isthmus (Fig. 6). Its elevational range is 1025 – 3177 m asl through a variety of habitats, from pine or mixed forest to cloud forest, including cultivated land in semi-open areas. 95 % of B. nigrodorsalis records are from above 2500 m, while B. weisi is more abundant below this elevation. Bombus weisi has been collected all year round, except in May, with 95 % of the records in July to December. Bombus weisi and B. nigrodorsalis are broadly sympatric in some regions of Mexico, from San Luis Potosí to Oaxaca (Fig. 6), but B. weisi extends beyond Mexico southwards as far as Costa Rica (Labougle, 1990).	en	Williams, Paul H., Sagot, Philippe, Martínez-López, Oscar, Barajas, Ricardo Ayala-, Mérida-Rivas, Jorge A., Vandame, Rémy (2024): A new wave of Mesoamerican bumblebees? Revising the weisi-complex to reject numts and pseudospecies (Apidae: Bombus). Zootaxa 5514 (4): 301-318, DOI: 10.11646/zootaxa.5514.4.1, URL: http://dx.doi.org/10.11646/zootaxa.5514.4.1
