Stygnoplus clavotibialis, copyright Bryan Reynolds.

Belongs within: Stygnidae.

Stygnoplus is a genus of harvestmen found in northernmost South America and on islands around the Caribbean.

Characters (from Pinto-da-Rocha 1997): Dorsal scute with lateral margins convex. Cephalothorax with one large median spine. Lateral margins without white spots. Areas I–IV and posterior margin with or without white spots. Areas I–III with two spines. Chelicera small-tuberculate. Apex of basal sockets of pedipalpal tibia bifid. Penis with distal U-shaped cleft; ventral plate narrow and short basally, with setae placed medially; without ventral setae; truncus with four pairs of setae; without dorsal process; basal part of glans membranous.

<==Stygnoplus Simon 1879 V-MR04 (see below for synonymy)
    |--*S. forcipatus (Koch 1845) [=Stygnus forcipatus] K03
    |--S. antiguanus (Roewer 1943) [=Ilhastygnus antiguanus] K03
    |--S. biguttatus Pinto-da-Rocha 1997 K03
    |--S. clavotibialis (Goodnight & Goodnight 1947) [=Pseudostygnoplus clavotibialis] V-MR04
    |--S. flavitarsis (Simon 1879) V-MR04 [=*Styphelus flavitarsis K03]
    |--S. granulosus Mello-Leitão 1940 V-MR04
    |--S. lomion Villarreal-M. & Rodríguez 2004 V-MR04
    |--S. longipalpus (Goodnight & Goodnight 1942) V-MR04 [=*Pseudostygnoplus longipalpus K03]
    |--S. meinerti Sørensen 1932 K03
    |--S. triacanthus (Kollar 1839) V-MR04 [=Stygnus triacanthus K03]
    |--S. trilineatus Pinto-da-Rocha 1997 K03
    `--S. tuberculatus (Goodnight & Goodnight 1942) V-MR04 (see below for synonymy)

Stygnoplus Simon 1879 V-MR04 [incl. Ilhastygnus Roewer 1943 (nom. inv.) K03, KA-Z11, Parastygnoplus Goodnight & Goodnight 1942 K03, Pseudostygnoplus Goodnight & Goodnight 1942 K03, Styphelus Simon 1879 K03]

Stygnoplus tuberculatus (Goodnight & Goodnight 1942) V-MR04[=*Parastygnoplus tuberculatus K03; incl. *Ilhastygnus dominicanus Roewer 1943 K03, Stygnoplus dominicanus K03]

*Type species of generic name indicated


[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.

[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.

Pinto-da-Rocha, R. 1997. Systematic review of the Neotropical family Stygnidae (Opiliones, Laniatores, Gonyleptoidea). Arq. Zool., Sao Paulo 33 (4): 163–342.

[V-MR04] Villarreal-M., O., & C. J. Rodríguez. 2004. Descripción de una nueva especie y dos nuevos registros del género Stygnoplus (Opiliones, Stygnidae) para Venezuela. Revista Ibérica de Aracnología 10: 179–184.

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