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1. Diversification and post-glacial range expansion of giant North American camel spiders in genus Eremocosta (Solifugae: Eremobatidae)

   https://doi.org/10.1038/s41598-021-01555-1  

   Santibáñez-López, Carlos E.; Cushing, Paula E.; Powell, Alexsis M.; Graham, Matthew R. (December 2021, Scientific Reports)

   Abstract Species of camel spiders in the family Eremobatidae are an important component of arthropod communities in arid ecosystems throughout North America. Recently, research demonstrated that the evolutionary history and biogeography of the family are poorly understood. Herein we explore the biogeographic history of this group of arachnids using genome-wide single nucleotide polymorphism (SNP) data, morphology, and distribution modelling to study the eremobatid genus Eremocosta , which contains exceptionally large species distributed throughout North American deserts. Relationships among sampled species were resolved with strong support and they appear to have diversified within distinct desert regions along an east-to-west progression beginning in the Chihuahuan Desert. The unexpected phylogenetic position of some samples suggests that the genus may contain additional, morphologically cryptic species. Geometric morphometric analyses reveal a largely conserved cheliceral morphology among Eremocosta spp. Phylogeographic analyses indicate that the distribution of E. titania was substantially reduced during the last glacial maximum and the species only recently colonized much of the Mojave Desert. Results from this study underscore the power of genome-wide data for unlocking the genetic potential of museum specimens, which is especially promising for organisms like camel spiders that are notoriously difficult to collect. 

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2. Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic

   https://doi.org/10.11646/phytotaxa.567.1.2  

   SIVER, PETER A.; ODDSUND, ERIK; LOTT, ANNE M. (September 2022, Phytotaxa)

   Eunotia is the largest and most diverse genus within the family Eunotiaceae, a primarily freshwater group of diatoms often found in dilute, acidic and humic-stained environments. Species in this genus are characterized by being asymmetric along their apical axis, symmetric about the transapical axis, and with a simple and reduced raphe system situated largely on the mantle and restricted to the apical ends of the valve. In addition, Eunotia taxa have one or more rimoportula per valve, usually close to the apex. Because of their reduced raphe system, coupled with the presence of rimoportulae, Eunotia and its relatives are often viewed as the oldest lineage of raphe-bearing diatoms. To date, the oldest remains of Eunotia species have been reported from the early to middle Eocene, including from the Giraffe Pipe locality, an ancient Eocene fossil site located in northern Canada near the Arctic Circle. Rocks from this site contain a large and diverse assemblage of Eunotia taxa. The purpose of this study is to begin to characterize this assemblage with descriptions of three new species, Eunotia giraffensis sp. nov., E. petasum sp. nov. and E. pseudonaegelii sp. nov. The new species, representing the longest specimens found at the Giraffe Pipe locality, each possess characteristics common to Eunotia making them easily assigned to this genus. Because the Eunotia lineage was well established by the early part of the Eocene, it is likely to be significantly older. 

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3. Electric Blue: Molecular Evolution of Three-Finger Toxins in the Long-Glanded Coral Snake Species Calliophis bivirgatus

   https://doi.org/10.3390/toxins13020124  

   Dashevsky, Daniel; Rokyta, Darin; Frank, Nathaniel; Nouwens, Amanda; Fry, Bryan G. (February 2021, Toxins)

   The genus Calliophis is the most basal branch of the family Elapidae and several species in it have developed highly elongated venom glands. Recent research has shown that C. bivirgatus has evolved a seemingly unique toxin (calliotoxin) that produces spastic paralysis in their prey by acting on the voltage-gated sodium (NaV) channels. We assembled a transcriptome from C. bivirgatus to investigate the molecular characteristics of these toxins and the venom as a whole. We find strong confirmation that this genus produces the classic elapid eight-cysteine three-finger toxins, that δδ-elapitoxins (toxins that resemble calliotoxin) are responsible for a substantial portion of the venom composition, and that these toxins form a distinct clade within a larger, more diverse clade of C. bivirgatus three-finger toxins. This broader clade of C. bivirgatus toxins also contains the previously named maticotoxins and is somewhat closely related to cytotoxins from other elapids. However, the toxins from this clade that have been characterized are not themselves cytotoxic. No other toxins show clear relationships to toxins of known function from other species. 

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4. A New Family of Stoneflies (Insecta: Plecoptera), Kathroperlidae, fam. n., with a Phylogenomic Analysis of the Paraperlinae (Plecoptera: Chloroperlidae)

   https://doi.org/10.1093/isd/ixab014  

   South, Eric J; Skinner, Rachel K; Edward DeWalt, R; Davis, Mark A; Johnson, Kevin P; Teslenko, Valentina A; Lee, Jonathan J; Malison, Rachel L; Hwang, Jeong Mi; Bae, Yeon Jae; et al (July 2021, Insect Systematics and Diversity)

   Ware, Jessica (Ed.)

   Abstract Recent molecular analyses of transcriptome data from 94 species across 92 genera of North American Plecoptera identified the genus Kathroperla Banks, 1920 as sister group to Chloroperlidae + Perlodidae. Given that the genus Kathroperla has historically been included as a member of the family Chloroperlidae, this discovery indicated further investigation of the genus and the subfamily Paraperlinae was needed. Both transcriptome and genome sequencing datasets were generated from 32 species of the infraorder Systellognatha, including all described species of the Paraperlinae, to test the phylogenetic placement of these taxa. From these datasets, a large phylogenomic data matrix of 800 orthologous genes was produced, and multiple analyses were conducted, including both concatenated and coalescent analyses. Morphological comparisons were made among all Paraperlinae using light microscopy. All molecular results support a monophyletic Kathroperla, which is supported as sister taxon to the remaining Perloidea by five of six molecular analyses. Postocular head length is determined to be a distinct morphological character of this genus. Combined molecular and morphological evidence support the designation of Kathroperlidae, fam. n., as the seventeenth family of extant Plecoptera. 

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5. Matriarchs Matter: Family Influences to Scientific Thinking of Women of Color in the Community College

   Yap, Melo-Jean (March 2020, IAFOR International Conference on Education official conference proceedings)

   In the University of California system, community college transfer students comprise of 48% of graduates with STEM bachelor’s degrees. This demonstrates that two-year colleges help pave the career pathways of community college students, many of which are students from underrepresented backgrounds in STEM fields. To cultivate the potential of women of color in pursuing STEM fields in the community college, focusing on their standpoint will empower them in centering their own perspectives in their own retention and success. Learning more about their standpoint also highlights their knowledge production as future producers of knowledge in the STEM fields. To obtain the influences to their scientific thinking development, 35 women of color STEM majors answered a social network questionnaire by nominating these influences. Social network analysis was used to analyze their influential social networks. Results demonstrate that family members have the highest frequency of influence to scientific thinking, regardless of educational attainment at the high school or lower levels. These relatives also heavily consist of matriarchal figures, such as mothers and grandmothers, especially as influences to scientific observation and scientific justification. These findings signify the importance of family in cultivating intellect, whether or not the relatives obtained college degrees or higher. Significance also supports emphasis on the students’ standpoint in self-determining their own success, and creates a campus culture that celebrates family-inclusiveness. Creating campus programming that caters to students’ strong relationships with their families may promote even more persistence in their STEM career trajectories. 

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