Thrinchostoma de Saussure 1890
Creators: name: Pauly, Alain
name: Eardley, Connal
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Thrinchostoma

description: Key to the species in Thrinchostoma de Saussure, 1890   
Males only:  
 (1) Antennae composed of only 12 segments (fig. 5a) ….................... T. emini Blüthgen, 1930   
- Antennae composed of 13 segments (fig. 5b) ….................................................................. (2)  
(2) Last segment of antennae bent at right angles or nearly so (fig. 6a) …............................ (3)  
- Last segment of antennae straight (fig. 6b) …...................................................................... (6)  
(3) Apical margin of S5 with setae (fig. 7a)........................................................................... (4)  
- Apical margin of S5 glabrous (fig. 7b)................................................................................ (5)  
 (4) Hind femora strongly swollen (fig. 8a) ….............................. T. nachtigali Blüthgen, 1930   
 - Hind femora weakly swollen (fig. 8b)........................................... T. sjoestedti (Friese, 1909)   
 (5) Apical lobe of hind tibia short (fig. 9a); apical margin of S5 slightly curved (fig. 9c); terga always black....................................................................................... T. kandti Blüthgen, 1930   
 - Apical lobe of hind tibiae longer (fig. 9b); apical margin of S5 distinctly concave (fig. 9d); terga often partly red, rarely totaly black........................................... T. petersi Blüthgen, 1930   
 (6) Hind tibiae very broad and covered with a dense tomentum (fig. 10a); apical margin of S5 with long and very dense setae (fig. 10b) …............................. T. orchidarum Cockerell, 1908   
- Hind tibiae of different shape and without dense tomentum; apical margin of S5 without setae or with less dense setae................................................................................................. (7)  
(7) Punctuation of scutum very sparse (fig. 11a)................................................................. (8)  
- Punctuation of scutum dense (fig. 11b)............................................................................... (9)  
 (8) Metasoma and legs orange; hind femora swollen, apical lobe of hind tibiae acutely angled (fig. 12a)............................................................................ T. amanicum (Strand, 1910)   
 - Metasoma and legs dark brown; hind femora slender, apical lobe of hind tibiae truncated distally (fig. 12b)..................................................... T. uluguruensis Pauly & Eardley sp. nov.   
 (9) S5 without apical setae; apical lobe of hind tibiae triangular; posterior basitarsi narrow (fig. 13a); antennal segments long............................................... T. productum (Smith, 1853)   
 - S5 with apical sertae; apical lobe of hind tibiae truncated distally; hind basitarsi very wide (fig. 13b); antennal segments short................................ T. upembae Pauly & Eardley sp. nov.
description: Published as part of Pauly, Alain & Eardley, Connal, 2013, A Revision of Afrotropical Thrinchostoma de Saussure, 1890 (Hymenoptera: Apoidea: Halictidae), pp. 1-76 in Belgian Journal of Entomology 12 on pages 8-12, DOI: 10.5281/zenodo.13486944