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luanavieirac.bsky.social
luanavieirac.bsky.social
@luanavieirac.bsky.social
12 followers 44 following 2 posts
Biologist | PhD student in Evolutionary Biology
Researching insects, evolution & ecological patterns.
I study solitary wasps and bees in Brazil.
Cooking is my love language.
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Reposted by luanavieirac.bsky.social
plosbiology.org
#Haplodiploid inheritance is found in all species of #Hymenoptera. @mwbstr.bsky.social &co map the #sex determining #gene of the red mason #bee to the ANTSR gene region, suggesting a shared, ancient origin of #SexDetermination in bees & ants >150 Mya ago @plosbiology.org 🧪 plos.io/47COEtH
Complementary sex determination (CSD) in bees and ants. Top left: Single-locus CSD is likely to be the predominant mode of sex determination in Hymenoptera. CSD loci have been identified in two species: the honeybee Apis mellifera and the invasive ant Linepithema humile. The tree shows evolutionary relationships between these species and Osmia bicornis, the main subject of this study. The origin of Hymenoptera is estimated as 386 million years ago and the common ancestor of Apoidea and Formicoidea is estimated as 153 million years ago. Top right: Under single-locus CSD, females are heterozygous at the CSD locus, whereas males are haploid and therefore hemizygous. A large number of CSD alleles are expected to segregate in outbred populations. A small proportion of homozygotes at the CSD locus are produced by chance, when parents share an allele, which results in the production of sterile diploid males. Middle: An O. bicornis nest consists of a row of cocoons in a tube. The mother lays fertilized diploid eggs deepest in the nest and unfertilized haploid eggs closer to the entrance. Eggs develop into adults inside cocoons. Diploid eggs typically develop into females whereas haploid eggs become male. A small proportion of diploids that are homozygous at the CSD locus develop into diploid males, which occur amongst females and are larger than haploid males. Bottom: A male and female red mason bee mating. Photo by Marie Louise Huskens.
November 4, 2025 at 5:38 PM
luanavieirac.bsky.social
December 24, 2025 at 2:12 PM
luanavieirac.bsky.social
Centris bees (Apidae: Centridini) are solitary bees best known for their oil-collecting behavior. Females collect floral oils mainly from Malpighiaceae, using specialized scopae. These oils are mixed with pollen to provision the brood cells and play a structural role in nest construction.
December 24, 2025 at 2:07 PM