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Agapostemon tyleri Cockerell, 1917
Agapostemon martini Cockerell, 1927

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Agapostemon
Subgenus: Agapostemon

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Agapostemon tyleri, Tylers Agapostemon
© Copyright John Ascher, 2006-2014 · 6
Agapostemon tyleri, Tylers Agapostemon

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Agapostemon tyleri, Tylers Agapostemon
© Copyright John Ascher, 2006-2014 · 6
Agapostemon tyleri, Tylers Agapostemon
Agapostemon tyleri, Tylers Agapostemon
© Copyright John Ascher, 2006-2014 · 6
Agapostemon tyleri, Tylers Agapostemon

Agapostemon tyleri, female, head, supraclypeus, mtg
© Kimberly Huntzinger, 2007 · 1
Agapostemon tyleri, female, head, supraclypeus, mtg
Agapostemon tyleri, male, S4-6, mtg
© Kimberly Huntzinger, 2007 · 1
Agapostemon tyleri, male, S4-6, mtg
Identification
Extracted from: Roberts, 1973. Bees of Northwester America: AGAPOSTEMON. Agricultural Experimental Station. Oregon State University.
Agapostemon tyleri occurs in the desert South-
west and in arid parts of Mexico. I have seen specimens from as far north
as Jerome, Arizona; as far south as Tehuacan, Puebla, Mexico; as far east
as the Gulf Coast in Tamaulipas, Mexico; and as far west as Prescott,
Arizona. It ranges from sea level in Tamaulipas, Mexico, to 8,200 ft. (2,499
m) at Pachuca, Hidalgo, Mexico. Throughout most of its range it occurs
at altitudes of over 4,000 ft. (1,219 m) on the central plateau. In the United
States males have been collected from February through April, June through
September, and November; and females in April and May, July through
September, and November. In Mexico males have been collected in Feb-
ruary, May through September, and November; and females from June
through September, and December.

Diagnosis. The male may be distinguished from all North American
species except A. coloradinus by the lack of yellow maculations on its dark
brown to black metasomal sterna; from A. coloradinus by its smaller size,
by the black streak extending the entire length of the posterior surface of
its hind tibia (Figs. 159-160), and by its broader penis valve, which lacks
conspicuous hairs on its dorsal crest (Figs. 226-227). The female may be
distinguished from many other species occurring north of Mexico by its
black metasoma and by the lack of yellow on its clypeus; from A. virescens
by its finer genal carinulae (2-3 per 0.25 mm in A. virescens and 5-6 per 0.25
mm in A. tyleri, cf. Figs. 28-29); and from A. coloradinus by its colorless
wings, darker tegulae, and shinier supraclypeal protuberance. This species
is very close to A. coloradinus. Description
male (Figs. 95-96, 159, 184, 198, 227)

General coloration of head and mesosoma bright metallic blue-green to
blue, metasoma with black and pale yellow to creamy bands. Head
(Figs. 95-96): pubescence snowy white. (1) Labrum as in A. texanus but
more rounded at apex. (2) Clypeus as in A. virescens but punctures shal-
lower and pubescence more dense. (3) Interocular area with coarse con-
tiguous punctures (some specimens finely rugose around antennal sockets) ;
supraclypeal protuberance as in A. virescens. (4) Vertex as in A. virescens.
(5) Gena as in A. virescens but with carinae much finer. (6) Malar area
yellow, never amber; short. (7) Mandible as in A. virescens. (8) Antenna
as in A. coloradinus. Mesosoma: pubescence snowy white. (9) Prono-
tum as in A. virescens but with weaker sculpturing. (10) Mesoscutum
as in A. virescens but with finer punctures and with anterior margin punc-
tate. (11-13) Mesoscutelhtm, metanotum and mete pi sternum as in A.
virescens but with finer sculpturing. (14-17) Metepisternum, propodeum ,
wing and tegula as in A. coloradinus. (18-20) Fore, middle and hind legs
as in A. virescens but posterior surfaces of tibiae and femora nearly com-
pletely covered with dark brown to brown-black, and usually with small
yellow rim apically on ventral surface of trochanters (Fig. 159). Meta-
soma: (21-22) Terga and sterna as in A. coloradinus but with creamy
band on tergum 1 almost always broadly interrupted medially. (23) Geni-
talia (Figs. 184, 198, 227) as in A. virescens but with much smaller fold on
medial plate of gonostylus and with prominent dorsal crest on penis valve.

female (Figs. 29, 51-52)

General coloration of head and mesosoma bright metallic blue-green,
metasoma black with white hair bands. Head (Figs. 51-52): (1) Labrum
as in A. texanus. (2-4) Clypeus, interocular area and vertex as in A.
virescens but with center of supraclypeal protuberance shiny and nearly im-
punctate. (5) Gena as in A. virescens but with much finer and more nu-
merous (5-6 per 0.25 mm) carinulae. (6) Malar area very dark ferruginous
to brown-black; very narrow, almost absent. (7-8) Mandible and antenna
as in A. coloradinus. Mesosoma: snowy white pubescence sometimes
very slightly fuliginous on mesonotum and metanotum. (9-15) Pronotum,
mesoscutum, mesoscutellum , metanotum, mesepisternum, metepisternum
and propodeum as in A. virescens but with sculpturing slightly shallower
and finer. (16) Wing as in A. virescens but always clear, never slightly
amber. (17) Tegula as in A. virescens but dark amber (also darker than in
A. coloradinus). (18-20) Fore, middle and hind legs as in A. virescens but
with pubescence slightly paler. Metasoma: (21) Terga as in A. virescens but with pubescence on 5-6 paler brown. (22) Sterna as in A. virescens but
darker.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Aizoaceae  Trianthema portulacastrum @ AMNH_BEE (1)
Asteraceae  Baccharis glutinosa @ AMNH_BEE (2)

Baccharis @ AMNH_BEE (19)

Helianthus annuus @ BBSL (4)

Helianthus @ AMNH_BEE (1)

Verbesina encelioides @ I_JSA (3)
Brassicaceae  Sisymbrium altissimum @ BBSL (1)
Cactaceae  Opuntia sp @ BBSL (1)
Fabaceae  Caesalpinia gilliesii @ AMNH_BEE (1)

Medicago sp @ BBSL (1)

Melilotus officinalis @ AMNH_BEE (2)
Zygophyllaceae  Kallstroemia sp @ BBSL (2)

Larrea tridentata @ BBSL (2)
_  Withheld @ BBSL__CAVE (94); BBSL (7)

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Updated: 2020-06-02 18:42:55 gmt
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