arachnida

Summary

Summary: A class of Arthropoda that includes SPIDERS; TICKS; MITES; and SCORPIONS.

Top Publications

  1. Hedin M, Thomas S. Molecular systematics of eastern North American Phalangodidae (Arachnida: Opiliones: Laniatores), demonstrating convergent morphological evolution in caves. Mol Phylogenet Evol. 2010;54:107-21 pubmed publisher
    ..Many questions remain, but our studies provide a solid framework for further systematic investigations of this interesting group...
  2. Thomas S, Hedin M. Multigenic phylogeographic divergence in the paleoendemic southern Appalachian opilionid Fumontana deprehendor Shear (Opiliones, Laniatores, Triaenonychidae). Mol Phylogenet Evol. 2008;46:645-58 pubmed
    ..Conservation implications and the prospect for future comparative arachnid phylogeography in the southern Appalachians are discussed in light of the results presented here...
  3. Fahrein K, Talarico G, Braband A, Podsiadlowski L. The complete mitochondrial genome of Pseudocellus pearsei (Chelicerata: Ricinulei) and a comparison of mitochondrial gene rearrangements in Arachnida. BMC Genomics. 2007;8:386 pubmed publisher
    ..The first complete mitochondrial DNA genome of a member of the Ricinulei, Pseudocellus pearsei (Arachnida: Ricinulei) was sequenced using a PCR-based approach...
  4. Machado G, Bonato V, Oliveira P. Alarm communication: a new function for the scent-gland secretion in harvestmen (Arachnida: Opiliones). Naturwissenschaften. 2002;89:357-60 pubmed
    ..The discovery of this novel function of scent-gland secretion is meaningful in view of the widespread occurrence of gregarious habit among species of the order Opiliones...
  5. Chang J, Masters A, Avery A, Werren J. A divergent Cardinium found in daddy long-legs (Arachnida: Opiliones). J Invertebr Pathol. 2010;105:220-7 pubmed publisher
    ..Based on high pairwise genetic distances, deep branch, and a distinct phylogenetic grouping, we conclude that some Opiliones harbor a newly discovered Cardinium clade...
  6. Masta S. Mitochondrial rRNA secondary structures and genome arrangements distinguish chelicerates: comparisons with a harvestman (Arachnida: Opiliones: Phalangium opilio). Gene. 2010;449:9-21 pubmed publisher
  7. Klann A, Alberti G. Histological and ultrastructural characterization of the alimentary system of solifuges (Arachnida, Solifugae). J Morphol. 2010;271:225-43 pubmed publisher
    ..In contrast to the midgut, the epithelium of the hindgut consists of only one type of cell overlain by a thin cuticle. Digested residuals are stored in the hindgut until defecation...
  8. Dunlop J, Anderson L, Kerp H, Hass H. Palaeontology: preserved organs of Devonian harvestmen. Nature. 2003;425:916 pubmed
  9. Michalik P, Dallai R, Giusti F, Alberti G. The ultrastructure of the peculiar synspermia of some Dysderidae (Araneae, Arachnida). Tissue Cell. 2004;36:447-60 pubmed
    ..The secreted sheath surrounding the spermatozoa is finally synthesized in the parts of the vasa deferentia, which are close to the genital opening where numerous vacuoles and microvilli are seen in the epithelial cells...

More Information

Publications62

  1. Fahrein K, Masta S, Podsiadlowski L. The first complete mitochondrial genome sequences of Amblypygi (Chelicerata: Arachnida) reveal conservation of the ancestral arthropod gene order. Genome. 2009;52:456-66 pubmed publisher
    ..Phylogenetic analysis resulted in weak support for Uropygi being the sister group of Amblypygi...
  2. Davila S, Piñero D, Bustos P, Cevallos M, Davila G. The mitochondrial genome sequence of the scorpion Centruroides limpidus (Karsch 1879) (Chelicerata; Arachnida). Gene. 2005;360:92-102 pubmed
    The mitochondrial genome of the scorpion Centruroides limpidus (Chelicerata; Arachnida) has been completely sequenced and is 14519 bp long...
  3. Klann A, Gromov A, Cushing P, Peretti A, Alberti G. The anatomy and ultrastructure of the suctorial organ of Solifugae (Arachnida). Arthropod Struct Dev. 2008;37:3-12 pubmed
    ..The surface of the suctorial organ is constituted of a very thin epicuticle overlaying the ramifying apices forming ridges and furrows on the ventral side of the suctorial organ...
  4. Masta S, Boore J. Parallel evolution of truncated transfer RNA genes in arachnid mitochondrial genomes. Mol Biol Evol. 2008;25:949-59 pubmed publisher
    ..Together, our data demonstrate variability in structural evolution among different tRNAs as well as evidence for parallel evolution of the loss of sequence coding for tRNA arms within an ancient and diverse group of animals...
  5. Buzatto B, Requena G, Martins E, Machado G. Effects of maternal care on the lifetime reproductive success of females in a neotropical harvestman. J Anim Ecol. 2007;76:937-45 pubmed
    ..3% in their lifetime fitness. Despite the verified fecundity costs of egg-guarding, this behaviour increases female fitness due to the crucial importance of female presence aimed to prevent egg predation...
  6. Raspotnig G, Fauler G, Leis M, Leis H. Chemical profiles of scent gland secretions in the cyphophthalmid opilionid harvestmen, Siro duricorius and S. exilis. J Chem Ecol. 2005;31:1353-68 pubmed
  7. Hedin M, Starrett J, Akhter S, Schönhofer A, Shultz J. Phylogenomic resolution of paleozoic divergences in harvestmen (Arachnida, Opiliones) via analysis of next-generation transcriptome data. PLoS ONE. 2012;7:e42888 pubmed publisher
  8. Rocha D, Hamilton K, Gonçalves C, Machado G, Marsaioli A. 6-Alkyl-3,4-dihydro-2H-pyrans: chemical secretion compounds in neotropical harvestmen. J Nat Prod. 2011;74:658-63 pubmed publisher
    ..The natural product was proven to be racemic, and its biogenetic origin is discussed...
  9. Huang D, Selden P, Dunlop J. Harvestmen (arachnida: opiliones) from the middle Jurassic of China. Naturwissenschaften. 2009;96:955-62 pubmed publisher
    Harvestmen (Arachnida: Opiliones) are familiar animals in most terrestrial habitats but are rare as fossils, with only a handful of species known from each of the Palaeozoic, Mesozoic, and Cenozoic eras...
  10. Lucato R, Abdulkader R, Barbaro K, Mendes G, Castro I, Baptista M, et al. Loxosceles gaucho venom-induced acute kidney injury--in vivo and in vitro studies. PLoS Negl Trop Dis. 2011;5:e1182 pubmed publisher
    ..Accidents caused by Loxosceles spider may cause severe systemic reactions, including acute kidney injury (AKI). There are few experimental studies assessing Loxosceles venom effects on kidney function in vivo...
  11. Mahnert V, Sharaf M, Aldawood A. Further records of pseudoscorpions (Arachnida, Pseudoscorpiones) from Saudi Arabia. Zootaxa. 2014;3764:387-93 pubmed publisher
    ..Minniza monticola Mahnert, 1991 and Rhacochelifer sonyae Mahnert, 1991 are apparently endemic to the southwestern mountains of Saudi Arabia. ..
  12. Eisner T, Rossini C, Gonzalez A, Eisner M. Chemical defense of an opilionid (Acanthopachylus aculeatus). J Exp Biol. 2004;207:1313-21 pubmed
    ..A. aculeatus may therefore contain distasteful factors besides its glandular products...
  13. Boyer S, Baker J, Giribet G. Deep genetic divergences in Aoraki denticulata (Arachnida, Opiliones, Cyphophthalmi): a widespread 'mite harvestman' defies DNA taxonomy. Mol Ecol. 2007;16:4999-5016 pubmed
    Aoraki denticulata (Arachnida, Opiliones, Cyphophthalmi, Pettalidae), a widespread 'mite harvestman' endemic to the South Island of New Zealand, is found in leaf littler habitats throughout Nelson and Marlborough, and as far south as ..
  14. Murienne J, Harvey M, Giribet G. First molecular phylogeny of the major clades of Pseudoscorpiones (Arthropoda: Chelicerata). Mol Phylogenet Evol. 2008;49:170-84 pubmed publisher
    ..This phylogenetic pattern suggests that venom glands evolved just once within this order of arachnids...
  15. Klann A, Bird T, Peretti A, Gromov A, Alberti G. Ultrastructure of spermatozoa of Solifuges (Arachnida, Solifugae): possible characters for their phylogeny?. Tissue Cell. 2009;41:91-103 pubmed publisher
    ..Old World families (Ammotrechidae, Daesiidae, Eremobatidae, Galeodidae, Karschiidae, Solpugidae) of solifuges (Arachnida, Solifugae) were investigated in order to reveal putative characters suitable for subsequent systematic and ..
  16. Masta S, Longhorn S, Boore J. Arachnid relationships based on mitochondrial genomes: asymmetric nucleotide and amino acid bias affects phylogenetic analyses. Mol Phylogenet Evol. 2009;50:117-28 pubmed publisher
    ..based on mitochondrial DNA have yielded widely differing relationships among members of the arthropod lineage Arachnida, depending on the nucleotide coding schemes and models of evolution used...
  17. Giribet G, Edgecombe G, Wheeler W, Babbitt C. Phylogeny and systematic position of Opiliones: a combined analysis of chelicerate relationships using morphological and molecular data. Cladistics. 2002;18:5-70 pubmed
    The ordinal level phylogeny of the Arachnida and the suprafamilial level phylogeny of the Opiliones were studied on the basis of a combined analysis of 253 morphological characters, the complete sequence of the 18S rRNA gene, and the D3 ..
  18. Santos A, Ferreira R, Buzatto B. Two new cave-dwelling species of the short-tailed Whipscorpion genus Rowlandius (Arachnida: Schizomida: Hubbardiidae) from northeastern Brazil, with comments on male dimorphism. PLoS ONE. 2013;8:e63616 pubmed publisher
    ..Moreover, males show a steeper allometry in pedipalp length than females, indicating that this trait is under a different selective regime in males and in females...
  19. Raspotnig G, Leutgeb V, Schaider M, Komposch C. Naphthoquinones and anthraquinones from scent glands of a dyspnoid Harvestman, Paranemastoma quadripunctatum. J Chem Ecol. 2010;36:158-62 pubmed publisher
    ..Naphthoquinones are known scent gland exudates of Cyphophthalmi and certain Eupnoi, methoxy-naphthoquinones and anthraquinones are new for opilionid scent gland secretions...
  20. Machado G, Carrera P, Pomini A, Marsaioli A. Chemical defense in harvestmen (arachnida, opiliones): do benzoquinone secretions deter invertebrate and vertebrate predators?. J Chem Ecol. 2005;31:2519-39 pubmed
  21. Dunlop J. Geological history and phylogeny of Chelicerata. Arthropod Struct Dev. 2010;39:124-42 pubmed publisher
    ..The fourth group, Arachnida, was found monophyletic in most recent studies...
  22. Schönhofer A, McCormack M, Tsurusaki N, Martens J, Hedin M. Molecular phylogeny of the harvestmen genus Sabacon (Arachnida: Opiliones: Dyspnoi) reveals multiple Eocene-Oligocene intercontinental dispersal events in the Holarctic. Mol Phylogenet Evol. 2013;66:303-15 pubmed publisher
    ..Morphological variation supports the divergent genetic clades observed in Sabacon, and suggests that a taxonomic revision (e.g., splitting Sabacon into multiple genera) may be warranted...
  23. Talarico G, Michalik P. Spermatozoa of an Old World Ricinulei (Ricinoides karschii, Ricinoidae) with notes about the relationships of Ricinulei within the Arachnida. Tissue Cell. 2010;42:383-90 pubmed publisher
    ..g., lacking nuclear envelopes/membranes in Actinotrichida (very similar to Solifugae) or vacuolated spermatozoa in Anactinotrichida. Affinities of Ricinulei are discussed in the light of the ultrastructure of arachnid spermatozoa...
  24. Shayesteh A, Zamiri N, Peymani P, Zargani F, Lankarani K. A novel management method for disseminated intravascular coagulation like syndrome after a sting of Hemiscorpius lepturus: a case series. Trop Biomed. 2011;28:518-23 pubmed
  25. Townsend V, Rana N, Proud D, Moore M, Rock P, Felgenhauer B. Morphological changes during postembryonic development in two species of neotropical harvestmen (Opiliones, Laniatores, Cranaidae). J Morphol. 2009;270:1055-68 pubmed publisher
    ..Morphological changes in postembryonic development in cranaid harvestmen are similar to those reported for other Laniatores...
  26. Sacramento R, Martins R, Miranda A, Dobroff A, Daffre S, Foronda A, et al. Differential effects of alpha-helical and beta-hairpin antimicrobial peptides against Acanthamoeba castellanii. Parasitology. 2009;136:813-21 pubmed publisher
    ..castellanii culture supernatants. We conclude that the use of antimicrobial peptides to treat A. castellanii infections requires the search of more specific peptides that are resistant to proteolysis...
  27. Ferrer V, de Mari T, Gremski L, Trevisan Silva D, da Silveira R, Gremski W, et al. A novel hyaluronidase from brown spider (Loxosceles intermedia) venom (Dietrich's Hyaluronidase): from cloning to functional characterization. PLoS Negl Trop Dis. 2013;7:e2206 pubmed publisher
    ..We propose the name Dietrich's Hyaluronidase for this enzyme, in honor of Professor Carl Peter von Dietrich, who dedicated his life to studying proteoglycans and glycosaminoglycans...
  28. Derkarabetian S, Ledford J, Hedin M. Genetic diversification without obvious genitalic morphological divergence in harvestmen (Opiliones, Laniatores, Sclerobunus robustus) from montane sky islands of western North America. Mol Phylogenet Evol. 2011;61:844-53 pubmed publisher
    ..Based on these data, it is obvious that S. robustus has undergone some level of cryptic diversification...
  29. Peattie A, Dirks J, Henriques S, Federle W. Arachnids secrete a fluid over their adhesive pads. PLoS ONE. 2011;6:e20485 pubmed publisher
    ..Indeed, the consensus in the literature is that spiders and their smooth-padded relatives, the solifugids, adhere without the aid of a secretion...
  30. Sharma P, Schwager E, Extavour C, Giribet G. Evolution of the chelicera: a dachshund domain is retained in the deutocerebral appendage of Opiliones (Arthropoda, Chelicerata). Evol Dev. 2012;14:522-33 pubmed publisher
    ..As a corollary, these data also provide an intriguing putative genetic mechanism for the diversity of arachnid chelicerae: loss of developmental domains along the proximo-distal axis...
  31. Ovchinnikov S, Masta S. Pseudoscorpion mitochondria show rearranged genes and genome-wide reductions of RNA gene sizes and inferred structures, yet typical nucleotide composition bias. BMC Evol Biol. 2012;12:31 pubmed publisher
    ..Additionally, some chelicerates possess an atypical guanine-thymine nucleotide bias on the major coding strand of their mitochondrial genomes...
  32. Talarico G, Palacios Vargas J, Alberti G. The pedipalp of Pseudocellus pearsei (Ricinulei, Arachnida) - ultrastructure of a multifunctional organ. Arthropod Struct Dev. 2008;37:511-21 pubmed publisher
    ..In order to present the complete sensory equipment of all appendages of the investigated Pseudocellus a comparative overview is provided...
  33. Oliveira L, Brescovit A. A taxonomic revision of the Neotropical spider genus Xiruana Brescovit 1997 (Araneae: Anyphaenidae, Anyphaeninae). Zootaxa. 2015;3980:201-29 pubmed publisher
    ..sp., X. guaia n. sp., X. jaboticabal n. sp., X. minacu n. sp., X. tapirape n. sp., X. lusitania n. sp., X. silarae n. sp., all endemic to Brazil. The known geographical distribution of all species here presented is mapped. ..
  34. Yun Y, Lei C, Peng Y, Liu F, Chen J, Chen L. Wolbachia strains typing in different geographic population spider, Hylyphantes graminicola (Linyphiidae). Curr Microbiol. 2011;62:139-45 pubmed publisher
    ..The significant correlation was observed between pairwise distance of H. graminicola COI and genetic divergence of associated Wolbachia strains. We also found that Wolbachia infection frequencies in hosts varied over geographic space...
  35. Clouse R, Sharma P, Giribet G, Wheeler W. Elongation factor-1?, a putative single-copy nuclear gene, has divergent sets of paralogs in an arachnid. Mol Phylogenet Evol. 2013;68:471-81 pubmed publisher
    ..These data contradict the common assumption that EF-1? is for most or all taxa a single-copy gene, or that it has a small number of paralogs that are homogenized through gene conversion, unequal crossing over, or other processes...
  36. Pfeiler E, Bitler B, Castrezana S, Matzkin L, Markow T. Genetic diversification and demographic history of the cactophilic pseudoscorpion Dinocheirus arizonensis from the Sonoran Desert. Mol Phylogenet Evol. 2009;52:133-41 pubmed publisher
    ..arizonensis, as well as O. longicornis, have experienced historical population expansions. Potential barriers to gene flow that may have led to genetic isolation and diversification in clades I and II of D. arizonensis are discussed...
  37. Garwood R, Dunlop J, Giribet G, Sutton M. Anatomically modern Carboniferous harvestmen demonstrate early cladogenesis and stasis in Opiliones. Nat Commun. 2011;2:444 pubmed publisher
    ..Compared with other arachnids--and terrestrial arthropods generally--harvestmen are amongst the first groups to evolve fully modern body plans...
  38. Oxford G, Gunnarsson B. Spatial variation in colour morph, spotting and allozyme frequencies in the candy-stripe spider, Enoplognatha ovata (Theridiidae) on two Swedish archipelagos. Genetica. 2006;128:51-62 pubmed
    ..It is not clear what selective forces act on colour...
  39. Kury A. Opiliones are no longer the same--on suprafamilial groups in harvestmen (Arthropoda: Arachnida). Zootaxa. 2015;3925:301-40 pubmed publisher
    ..Some of the hypotheses implied by these names are conflicting and mutually exclusive, but the state of knowledge of harvestman taxonomy is quickly changing, and no hypothesis that clearly supersedes the others can be detected. ..
  40. Bechsgaard J, Vanthournout B, Funch P, Vestbo S, Gibbs R, Richards S, et al. Comparative genomic study of arachnid immune systems indicates loss of beta-1,3-glucanase-related proteins and the immune deficiency pathway. J Evol Biol. 2016;29:277-91 pubmed publisher
    ..The gel-forming protein in horseshoe crabs, coagulogen, was not recovered in any of the arachnid genomes; however, it is possible that the arachnid clot consists of a related protein, spätzle, that is present in all of the genomes. ..
  41. Supp S, Ernest S. Species-level and community-level responses to disturbance: a cross-community analysis. Ecology. 2014;95:1717-23 pubmed
    ..We suggest that ecologists consider using multiple metrics that measure composition and structure in biodiversity response studies...
  42. Peng Y, Zhao J, Hu C. [Effect of temperature, relative humidity and photoperiod on embryonic development and egg hatch of Pirata piraticus]. Ying Yong Sheng Tai Xue Bao. 2001;12:95-8 pubmed
    ..After calculating the hatching rate using the model of hatching rate by computer, the optimum condition for egg hatch of the spider was given: temperature 27 degrees C-28.5 degrees C, relative humidity 94%-97%, and photoperiod 14-17 h...
  43. Svojanovská H, Nguyen P, Hiřman M, Tuf I, Wahab R, Haddad C, et al. Karyotype Evolution in Harvestmen of the Suborder Cyphophthalmi (Opiliones). Cytogenet Genome Res. 2016;148:227-36 pubmed publisher
    ..However, decreases as well as increases in the number of chromosomes have been detected in the karyotype evolution of Cyphophthalmi. Our data thus reveal unexpected diversity in cyphophthalmid karyotypes. ..
  44. Murienne J, Benavides L, Prendini L, Hormiga G, Giribet G. Forest refugia in Western and Central Africa as 'museums' of Mesozoic biodiversity. Biol Lett. 2013;9:20120932 pubmed publisher
  45. Proud D, Felgenhauer B. Ultrastructure of the sexually dimorphic basitarsal glands of leg I in manaosbiid harvestmen (Opiliones, Laniatores). J Morphol. 2011;272:872-82 pubmed publisher
    ..Finally, we discuss possible roles of these basitarsal glands in manaosbiid reproductive biology based on the present understanding of sexually dimorphic glands in other terrestrial arthropods (i.e., insects and spiders)...
  46. Zhao F, Padrón R, Craig R. Blebbistatin stabilizes the helical order of myosin filaments by promoting the switch 2 closed state. Biophys J. 2008;95:3322-9 pubmed publisher
    ..These properties make blebbistatin a useful tool in structural and functional studies of cell motility and muscle contraction...
  47. Byrne R, Bates L. Why are animals cognitive?. Curr Biol. 2006;16:R445-8 pubmed
  48. Vetter R. Arachnids submitted as suspected brown recluse spiders (Araneae: Sicariidae): Loxosceles spiders are virtually restricted to their known distributions but are perceived to exist throughout the United States. J Med Entomol. 2005;42:512-21 pubmed
    ..This study corroborates opinions that diagnosis of brown recluse spider bites is best restricted to areas historically supporting proven, widespread populations of Loxosceles spiders...
  49. Nahmani J, Rossi J. Soil macroinvertebrates as indicators of pollution by heavy metals. C R Biol. 2003;326:295-303 pubmed
  50. Lipovsek S, Letofsky Papst I, Hofer F, Pabst M. Seasonal- and age-dependent changes of the structure and chemical composition of the spherites in the midgut gland of the harvestmen Gyas annulatus (Opiliones). Micron. 2002;33:647-54 pubmed
  51. Spagna J, Peattie A. Terrestrial locomotion in arachnids. J Insect Physiol. 2012;58:599-606 pubmed publisher
    In this review, we assess the current state of knowledge on terrestrial locomotion in Arachnida. Arachnids represent a single diverse (>100,000 species) clade containing well-defined subgroups (at both the order and subordinal levels) ..
  52. Combes A, Choi S, Pimentel C, Darbon H, Waidelich D, Mestivier D, et al. Determination with matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry of the extensive disulfide bonding in tarantula venom peptide Psalmopeotoxin I. Eur J Mass Spectrom (Chichester). 2009;15:517-29 pubmed publisher
    ..Our findings illustrated the critical role of the electronic environment around the central Cys(18)-Cys(19) doublet in PcFK1 in internal fragmentation of the peptide...
  53. De Lima M, Figueiredo S, Pimenta A, Santos D, Borges M, Cordeiro M, et al. Peptides of arachnid venoms with insecticidal activity targeting sodium channels. Comp Biochem Physiol C Toxicol Pharmacol. 2007;146:264-79 pubmed
    ..Spider and scorpion toxins having insecticidal activity are reviewed here considering their structures, toxicities and action mechanisms in sodium channels of excitable membranes...