Schizomida

Male of Hubbardia pentapeltis, photographed by Marshal Hedin.

Belongs within: Arachnida.

The Schizomida are a group of less than 200 species of minute soil-dwelling arachnids, with the majority of species found in rainforest leaf litter. Schizomids are generally less than 5 mm in length and have long, tactile anterior legs. The posterior flagellum is sexually dimorphic, being bulbous and unsegmented in the male and elongate and segmented in the female (Harvey 2002).

<==Schizomida [Schizopeltidia]
    |  i. s.: Schizomus Cook 1899 H02
    |           `--S. palaciosi Reddell & Cokendolpher 1986 A05
    |         Trithyreus Kraepelin 1899 H02
    |           |--T. cambridgei K14
    |           `--T. modestus K14
    |--Calcitro Petrunkevitch 1945 [Calcitronidae] H02
    |    `--C. fisheri GE05
    |--Protoschizomidae S07
    |    |--Protoschizomus S07
    |    `--Agastoschizomus H02
    |--Schizonotoidae [Tartarides] T89
    |    |--Nyctalops crassicaudatus Cambridge 1872 T89, H02 (see below for synonymy)
    |    `--Tripeltis Thorell 1889 T89
    |         |--*T. grassii Thorell 1889 T89
    |         `--T. cambridgei Thorell 1889 T89
    `--Hubbardiidae S07
         |--Calcoschizomus Pierce 1951 H02
         |--Onychothelyphonus Pierce 1950 H02
         |--Megaschizomus [Megaschizominae] H02
         |--Stenochrus portoricensis Chamberlin 1922 S07, GE02
         `--Hubbardia [Hubbardiinae] GE02
              `--H. pentapeltis Cook 1899 GE02

Nyctalops crassicaudatus Cambridge 1872 T89, H02 [incl. N. tenuicaudatus Cambridge 1872 H02, Schizonotus tenuicaudatus T89]

*Type species of generic name indicated

REFERENCES

[A05] Alberti, G. 2005. Double spermatogenesis in Chelicerata. Journal of Morphology 266 (3): 281-297.

[GE02] Giribet, G., G. D. Edgecombe, W. C. Wheeler & C. Babbitt. 2002. Phylogeny and systematic position of Opiliones: A combined analysis of chelicerate relationships using morphological and molecular data. Cladistics 18: 5-70.

[GE05] Grimaldi, D., & M. S. Engel. 2005. Evolution of the Insects. Cambridge University Press: New York.

[H02] Harvey, M. S. 2002. The neglected cousins: What do we know about the smaller arachnid orders? Journal of Arachnology 30 (2): 357-372.

[K14] Kraepelin, K. 1914. Die Skorpione und Pedipalpen von Neu-Caledonien und den benachbarten Inselgruppen. In Nova Caledonia: Forschungen in Neu-Caledonian und auf den Loyalty-Inseln. A. Zoologie vol. 1, Heft IV (F. Sarasin & J. Roux, eds) pp. 327-337. C. W. Kreidels Verlag: Wiesbaden.

[S07] Shultz, J. W. 2007. A phylogenetic analysis of the arachnid orders based on morphological characters. Zoological Journal of the Linnean Society 150 (2): 221-265.

[T89] Thorell, T. 1889. Viaggio di Leonardo Fea in Birmania e regioni vicine. XXI. – Aracnidi Artrogastri Birmani raccolti da L. Fea nel 1885-1887. Annali del Museo Civico di Storia Naturale di Genova, Serie 2a 7: 521-729.