Male Gonyleptes fragilis, copyright Pedro H. Martins.

Belongs within: Gonyleptidae.

Gonyleptes is a diverse genus of harvestmen in southern Brazil.

Published 11 January 2010
Dorsal view of an unidentified Collonychium species. Photo by Abel & Ana.

The name Collonychium was recently revived from taxonomic limbo by Kury (2003) for two species of gonyleptid harvestmen found in south-east Brazil. Collonychium bicuspidatum is found in the provinces of Rio de Janeiro, São Paulo and Paraná while C. perlatum is found in Espírito Santo and Minas Gerais. Collonychium bicuspidatum had previously been included in the genus Paragonyleptes, of which it is the type species, before Kury (2003) recognised the type specimen of Collonychium bicuspidatum as a juvenile female of Paragonyleptes bicuspidatus (despite having the same species names, these two were originally described as separate species). A number of other southern Brazilian harvestman species had been assigned to Paragonyleptes, mostly by the famed creator of artificial classifications Carl-Friedrich Roewer and Cândido Firmino de Mello-Leitão (who, if anything, out-Roewered Roewer). These species were mostly listed by Kury (2003) as Gonyleptinae incertae sedis so they may or may not be Collonychium species.

I’m not entirely sure what’s happening in this photo, again by Abel & Ana. Gonyleptids such as Collonychium have very powerful posterior-directed hindlegs, often with large spines pointing inwards on the retrolateral side (they’re not as prominent in this individual, but in other species they may be very scary indeed). I think the individual in the photo above may be executing a handstand in order to bring the hindlegs into a better position to scissor with them at its intimidator (in this case, the photographer).

Systematics of Gonyleptes

Characters (from Pinto-da-Rocha et al. 2012): Generally large, dorsal scutum length longer than 8 mm, with males having femur IV with conspicuous armature and scutal areas I–III convex in lateral view. Penis with ventral plate very convex, apex of ventral process serrate and semicircular.

<==Gonyleptes Kirby 1819KA-Z11 (see below for synonymy)
    |--*G. horridus Kirby 1818K03, A19 (see below for synonymy)
    |--G. acanthopus (Quoy & Gaimard 1824)K03 (see below for synonymy)
    |--G. armatus Perty 1833 (n. d.)K03
    |--G. ater Mello-Leitão 1923KM20 [=G. atrusKM20, Melloleitaniella atraK03]
    |--G. auricola (Mello-Leitão 1924) [=Paragonyleptes auricola]KA20
    |--G. banana Kury 2003 (see below for synonymy)K03
    |--G. barbiellinii Mello-Leitão 1932 [=G. barbiellinu (l. c.); incl. G. crassus Mello-Leitão 1944, G. lanei Piza 1938]K03
    |--G. bicuspidatus Koch 1839 (see below for synonymy)K03
    |--‘Paragonyleptes’ bimaculatus (Sørensen 1884) [=Gonyleptes bimaculatus]K03
    |--G. borgmeyeri Mello-Leitão 1932 [=G. borgmeieri (l. c.)]K03
    |--G. calcaripes (Roewer 1917) [=*Metagoniosoma calcaripes; incl. G. eneodon Mello-Leitão 1931]K03
    |--G. curticornis (Mello-Leitão 1940) (see below for synonymy)K03
    |--G. espiritosantensis Soares 1944KA-Z11, K03
    |--G. fragilis Mello-Leitão 1923 [incl. G. flavipes Mello-Leitão 1923, G. perlatus Piza 1938]K03
    |--G. gertschi Soares & Soares 1948K03
    |--G. gonyleptoides (Soares & Soares 1945) [=Stephanocranion gonyleptoides]K03
    |--G. gonypernoides (Piza 1943) [=Gonyleptilus gonypernoides, Paragonyleptes gonypernoides]KA20
    |--G. granulatus (Piza 1940) [=*Melloleitaniella granulata]K03
    |--G. guttatus Roewer 1917 [=Melloleitaniella guttata]K03
    |--G. melloleitaoi Kury & Alonso-Zarazaga 2011 (see below for synonymy)KA-Z11
    |--G. parcigranulatus Soares & Soares 1949 [=G. paucigranulatus Mello-Leitão 1932 non Mello-Leitão 1923]K03
    |--G. paucigranulatus Mello-Leitão 1923 [=Melloleitaniella paucigranulata]K03
    |--G. pectinatus Koch 1845 [=Melloleitaniella pectinata]K03
    |--G. pectinipes Roewer 1917 (see below for synonymy)K03
    |--*Moojenia’ perlata Mello-Leitão 1935 (see below for synonymy)K03
    |--G. pseudogranulatus Soares & Soares 1946K03
    |--G. pseudoguttatus Giltay 1928K03
    |--G. pustulatus Sørensen 1884 [=Gonyleptus (l. c.) pustulatus]K03
    |--G. recentissimus Mello-Leitão 1932K03
    |--G. saprophilus Mello-Leitão 1922 (see below for synonymy)K03
    |--G. vatius Bertkau 1880K03
    `--G. viridisagittatus Soares & Soares 1945K03

Gonyleptes Kirby 1819KA-Z11 [=Gonoleptes Berthold 1827K18, Gonoleptus (l. c.)K03, Gonyleptis (l. c.)K03; incl. Anisoleptes Piza 1940K03, Collonychium Bertkau 1880KA20, Kainganga Mello-Leitão 1933K03, Melloleitaniella Piza 1940K03, Mendesius Roewer 1943K03, Metagoniosoma Roewer 1917K03, Metagonyleptoides Mello-Leitão 1923K03, Moojenia Mello-Leitão 1935K03, Moogenia (l. c.)K03, Nictheroya Mello-Leitão 1926K03, KA-Z11, Nicteroia (l. c.)K03, Nictheroia (l. c.)K03, Paragonyleptes Roewer 1913K03]

Gonyleptes acanthopus (Quoy & Gaimard 1824)K03 [=Phalangium acanthopusK03; incl. G. almeidai Soares & Soares 1945K03, G. cervus Roewer 1913K03, Eusarcus grandis Perty 1833K03, Eusarchus (l. c.) grandisR23, Gonyleptes acanthopus var. imbellicus Bertkau 1880R23]

Gonyleptes banana Kury 2003 [=Mendesius guttatus Roewer 1952 non G. guttatus Roewer 1917, Jupuvura punctata Soares & Soares 1949]K03

Gonyleptes bicuspidatus Koch 1839 [=Collonychium bicuspidatum, *Paragonyleptes bicuspidatus; incl. *Metagonyleptoides anomalus Mello-Leitão 1923, Metagonyleptoides anomalos (l. c.), *Collonychium bicuspidatum Bertkau 1880 non G. bicuspidatus Koch 1839, *Kainganga flangei Mello-Leitão 1933, Paragonyleptes flangei, *Nictheroya incerta Mello-Leitão 1927, Nictheroia (l. c.) incerta, Paragonyleptes luteispinis Mello-Leitão 1932, Metagoniosoma metropolitanum Mello-Leitão 1932, Gonyleptes metropolitanum, G. tijucanus Mello-Leitão 1932]K03

Gonyleptes curticornis (Mello-Leitão 1940) [=Anomaloleptes curticornis, Liogonyleptoides curticornis; incl. Gonyleptes ubatubae Soares 1945]K03

*Gonyleptes horridus Kirby 1818K03, A19 [=Gonoleptes (l. c.) horridusK03, Gonyleptus (l. c.) horridusK03; incl. *Mendesius albipunctatus Roewer 1943K03, Jupuvura albipunctataK03, Weyhia curvicornis Roewer 1913K03, Geraecormobius curvicornisK03, Ge. curvivornis (l. c.)K03, Gonyleptes lacrimosus Mello-Leitão 1932K03, Melloleitaniella lacrimosaK03]

Gonyleptes melloleitaoi Kury & Alonso-Zarazaga 2011 [=G. curvicornis Mello-Leitão 1932 non Weyhia curvicornis Roewer 1913]KA-Z11

Gonyleptes pectinipes Roewer 1917 [=Melloleitaniella pectinipes; incl. M. bunoweyhioides Piza 1943, Gonyleptes bunoweyhioides]K03

*Moojenia’ perlata Mello-Leitão 1935 [=Collonychium perlatum, Moogenia (l. c.) perlata, Metagonyleptoides perlatus; incl. *Anisoleptes condecoratus Piza 1940, Metagonyleptes condecoratus]K03

Gonyleptes saprophilus Mello-Leitão 1922 [incl. Weyhia bisignata Mello-Leitão 1933, Geraecormobius bisignata, Ge. bisignatus, W. brieni Giltay 1928, Gonyleptes brieni, Go. brienni (l. c.), Melloleitaniella brieni, Go. itatiayae Mello-Leitão 1932, Geraecormobius jimi Soares & Soares 1974, Go. niger Mello-Leitão 1932 (n. n.), Gyndesops pretiosus Mello-Leitão 1949, Temucus pretiosus]K03

*Type species of generic name indicated


[A19] Acosta, L. E. 2019. A relictual troglomorphic harvestman discovered in a volcanic cave of western Argentina: Otilioleptes marcelae, new genus, new species, and Otilioleptidae, new family (Arachnida, Opiliones, Gonyleptoidea). PLoS One 14 (10): e0223828.

[K03] Kury, A. B. 2003. Annotated catalogue of the Laniatores of the New World (Arachnida, Opiliones). Revista Ibérica de Aracnología, volumen especial monográfico 1: 1–337.

[K18] Kury, A. B. 2018. Familial nomina in harvestmen (Arachnida, Opiliones). Bionomina 13: 1–27.

[KA-Z11] Kury, A. B., & M. A. Alonso-Zarazaga. 2011. Addenda and corrigenda to the “Annotated catalogue of the Laniatores of the New World (Arachnida, Opiliones)”. Zootaxa 3034: 47–68.

[KA20] Kury, A. B., & L. N. de Ázara. 2020. New synonymies and combinations in the clade K92. In: Kury, A. B., A. C. Mendes, L. Cardoso, M. S. Kury & A. A. Granado. 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 pp. 44–47. Published by the author: Rio de Janeiro.

[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.

Pinto-da-Rocha, R., A. Benedetti, E. de Vasconcelos & M. Hara. 2012. New systematic assignments in Gonyleptoidea (Arachnida, Opiliones, Laniatores). ZooKeys 198: 25–68.

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

Leave a comment

Your email address will not be published. Required fields are marked *