The principal Larrea bees of the southwestern United States (Hymenoptera, Apoidea)

Hurd, Paul D.; Linsley, E Gorton

doi:10.5479/si.00810282.193

Cited by 58 publications

(57 citation statements)

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“…Observation of other developing fifth instars from the first site also contributed to our understanding defecation and cocoons. The fact that all larvae maintained alive from this study entered diapause indicates that this bee has only one generation a year, synchronized with the spring blooming of its host plant, as was reported by Hurd and Linsley (1975). This fact is of some interest because Larrea tridentata may have a second blooming period depending on the distribution of summer rains.…”

Section: Defecation and Cocoon Structure And Constructionmentioning

confidence: 72%

“…This fact is of some interest because Larrea tridentata may have a second blooming period depending on the distribution of summer rains. The only oligoleges (two species of Perdita [Andrenidae]) to visit this plant typically have two annual generations (Hurd and Linsley, 1975), although, as pointed out by one anonymous reviewer, others, such as Hesperapis larreae Cockerell, may occasionally have a second.…”

Section: Defecation and Cocoon Structure And Constructionmentioning

confidence: 99%

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Nesting Biology and Immatures of the Oligolectic BeeTrachusa larreae(Apoidea: Megachilidae: Anthidiini)

Rozen

Hall

2012

American Museum Novitates

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Herein we report on the nesting biology of ground-nesting Trachusa (Heteranthidium) larreae (Cockerell) from New Mexico and Arizona, an oligolege of creosote bush, Larrea tridentata (DC.) Coville (Zygophyllaceae). Nests are single, slanting, open burrows at the lower end of which are horizontal cells lined with resin collected from creosote bush, also the source of the orange, mealy-moist provisions. Eggs are placed on the surface of the provisions, and the first three instars remain in the same position as the eggs from which they hatched. The fourth instar separates its body from the provisions, and only the fifth (final larval) instar moves around the brood chamber while consuming remaining provisions and defecating prior to cocoon spinning. It is suggested that middorsal body tubercles and an integumental body vestiture of short setae and setiform spicules restricted to this instar are adaptations enabling the movement of the fifth instar not only of this species but possibly those of other Megachilinae, all of which have a body vestiture and presumably middorsal body tubercles.The cocoon is spun after most of the feces are voided. Like cocoons of many other Megachilidae, it bears a pronounced nipple at its anterior end. From its construction as well as by comparison with cocoons of other bee taxa, the nipple seems to serve a number of functions: it enables exchange between the interior air of the cocoon and the external ambient air; it screens out parasites and predators from attacking the cocoon inhabitant; and it probably regulates cell humidity.Eggs are briefly characterized, and three females each were found to have three ovarioles per ovary and to carry a single mature oocyte, which is classified as medium in Iwata and Sakagami's classification of egg/mature oocyte size relative to body size of female. The fifth instars (both preand postdefecating forms) are described and found similar to those of other Anthidiini.

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Section: Defecation and Cocoon Structure And Constructionmentioning

confidence: 72%

Section: Defecation and Cocoon Structure And Constructionmentioning

confidence: 99%

Nesting Biology and Immatures of the Oligolectic BeeTrachusa larreae(Apoidea: Megachilidae: Anthidiini)

Rozen

Hall

2012

American Museum Novitates

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“…The harmonies between floral and pollinator characteristics can be taken as evidence for the long period of co-evolution between flowering plants and pollinators (Kevan, 1984b;Willemstein, 1987). Nevertheless, there are many flowers that are effectively pollinated by a wide diversity of animals (Waser et al, 1996) along with many that are special, with restricted assemblages of potential pollinators Grant, 1965, 1968;Hurd and Linsley, 1975;Faegri and van der Pijl, 1979;Vogel, 1990;Proctor et al, 1996). Very few species of plants appear to be pollinated by single species of pollinators.…”

Section: Pollination Pollinators and Anthophilesmentioning

confidence: 99%

Pollinators as bioindicators of the state of the environment: species, activity and diversity

Kevan

1999

Agriculture, Ecosystems & Environment

346

151

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“…1; Hurd & Linsley, 1975) Rust et al (1983), and provide evidence of two additional Great Basin populations (Thorne Dune and Crescent Dune). Sand Mountain may represent the northern limit for C. stepheni.…”

Section: Resultsmentioning

confidence: 99%

The floral hosts and distribution of a supposed creosote bush specialist, <i>Colletes stepheni</i> Timberlake (Hymenoptera: Colletidae)

Nelson

Griswold

2015

J. Melittol.

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Abstract.Colletes stepheni Timberlake is thought to be a narrow oligolege of creosote bush, Larrea tridentata (DC.) Coville (Zygophyllaceae) with limited distribution in the Sonoran Desert of the western United States. Based on appraisal of museum specimens and field surveys from 1999 to 2001 on 21 sand dunes, we found C. stepheni to be a much more widely distributed psammophile of the Sonoran, Mojave, and Great Basin Deserts that utilizes two unrelated plant pollen sources, Larrea Cav. and Psorothamnus Rydb. (Fabaceae). The geologic history of the region suggests a potential host shift from the more ancient occupant, Psorothamnus, to the Neogene colonizer, Larrea.

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The principal Larrea bees of the southwestern United States (Hymenoptera, Apoidea)

Cited by 58 publications

References 0 publications

Nesting Biology and Immatures of the Oligolectic BeeTrachusa larreae(Apoidea: Megachilidae: Anthidiini)

Nesting Biology and Immatures of the Oligolectic BeeTrachusa larreae(Apoidea: Megachilidae: Anthidiini)

Pollinators as bioindicators of the state of the environment: species, activity and diversity

The floral hosts and distribution of a supposed creosote bush specialist, <i>Colletes stepheni</i> Timberlake (Hymenoptera: Colletidae)

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