Egaenus convexus, copyright Filip Trnka.

Belongs within: Phalangiidae.

Egaenus is a genus of phalangiid harvestmen found in arid regions of Eurasia. Species of this genus have relatively short legs and massively robust pedipalps, with the latter being strongly armed. Males often have chelicerae which are somewhat larger and thicker than those of females though the two sexes are similar in the Iranian species E. oedipus (Roewer 1923).

Characters (from Martens 1978): Truncus penis thickset to long-slender, dorsoventrally flattened, often with broad dorsal keel; muscles in more than basal half of truncus, sometimes filling its entire length. Glans spindle-shaped, often with basolateral fold. Pedipalp massively robust; femur, usually also patella and tibia, strongly armed with denticles; apophyses absent. Tuber oculorum usually small, low, weakly armed or completely smooth; approximately its length or more distant from frontal margin of cephalothorax. Supracheliceral lamellae smooth. Secondary sexual characteristics poorly developed; armature of male pedipalp more developed.

<==Egaenus Koch 1839SS19 [incl. Diabunus Thorell 1876C92]
    |--E. convexus (Koch 1835)K14 (see below for synonymy)
    |--E. amanensis (Simon 1884)K14 [=Phalangium amanenseR23]
    |--E. charitonovi (Gricenko 1972)S03
    |--E. diadema Simon 1885 (n. d.)R23
    |--E. kashmiricus Caporiacco 1934MJD23
    |--E. laevipes (Caporiacco 1935) [=Diabunus laevipes]KM20
    |--E. lindbergi (Roewer 1960)S03
    |--E. oedipus (Thorell 1876)S03 [=*Diabunus oedipusC92]
    |--E. pakistanus (Roewer 1956) [=Opilio pakistanus]S03
    |--E. robustus (Kulczyński 1901) [=Phalangium robustum]R23
    `--E. turcicus Snegovaya & Marusik 2012K14

Egaenus convexus (Koch 1835)K14 [=Opilio convexusC92; incl. E. atomarius Doleschall 1852KM20, Phalangium (Egaenus) atomariumR23, E. convexus var. atratus Sørensen in Lendl 1894R23, E. carpaticus Avram 1978S03, E. clairi Simon 1876R23, E. ictericus Koch 1839R23, E. convexus var. ictericusR23, E. maximus Sørensen in Lendl 1894R23, E. sinister Simon 1876R23, *E. tibialis Koch 1839C92, E. trivialis (l. c.)C92]

*Type species of generic name indicated


[C92] Crawford, R. L. 1992. Catalogue of the genera and type species of the harvestman superfamily Phalangioidea (Arachnida). Burke Museum Contributions in Anthropology and Natural History 8: 1–60.

[K14] Kurt, K. 2014. Updated checklist of harvestmen (Arachnida: Opiliones) in Turkey. Arch. Biol. Sci. 66 (4): 1617–1631.

[KM20] Kury, A. B., A. C. Mendes, L. Cardoso, M. S. Kury & A. A. Granado. 2020. WCO-Lite: Online world catalogue of harvestmen (Arachnida, Opiliones). Version 1.0—Checklist of all valid nomina in Opiliones with authors and dates of publication up to 2018. Published by the author: Rio de Janeiro.

[MJD23] Martens, J., J. M. Julka & S. Devi. 2023. Himachalus pradeshicus, an unusual new harvestman genus and species from the Indian Himalayas of Himachal Pradesh (Arachnida, Opiliones, Phalangiidae). Revue Suisse de Zoologie 130 (2): 275–283.

[R23] Roewer, C.-F. 1923. Die Weberknechte der Erde: Systematische Bearbeitung der bisher bekannnten Opiliones. Gustav Fischer: Jena.

[SS19] Snegovaya, N. Y., & W. Staręga. 2019. A new species of the genus Redikorcevia Snegovaya et Staręga, 2008 (Arachnida: Opiliones: Phalangiidae) from Xinjiang, China. Arthropoda Selecta 28 (2): 257–259.

[S03] Staręga, W. 2003. On the identity and synonymies of some Asiatic Opilioninae (Opiliones: Phalangiidae). Acta Arachnologica 52 (2): 91–102.

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