Liomma Roewer, 1959

Kury, Adriano B., Villarreal, Osvaldo & Medrano, Miguel, 2024, On the systematic allocation of Liomma Roewer, 1959 (Arachnida: Opiliones: Nomoclastidae) and discovery of a putative synapomorphy for Nomoclastinae, Journal of Natural History 58 (1 - 4), pp. 1-13 : 4-5

publication ID

https://doi.org/ 10.1080/00222933.2023.2287765

DOI

https://doi.org/10.5281/zenodo.10818430

persistent identifier

https://treatment.plazi.org/id/442A87F2-2925-FFCD-7A95-5E5EFE47BF1B

treatment provided by

Plazi

scientific name

Liomma Roewer, 1959
status

 

Genus Liomma Roewer, 1959 View in CoL

Liomma Roewer 1959: 72 View in CoL

[type species: Liomma laeve Roewer,1959 View in CoL , by original designation]

Liomma View in CoL – Kury 2003: 25 (cat.)

Placement

Originally in Tricommatinae, removed to Grassatores incertae sedis by Kury (2003). Transferred herein to Nomoclastidae : Nomoclastinae NEW FAMILIAL ASSIGNMENT.

Included species

Liomma laeve Roewer, 1959 View in CoL .

Etymology

From Greek λεῖος (smooth) + ὄμμα (eye). Possibly referring to the unarmed and glossy ocularium. Gender neuter.

Diagnosis

Medium-sized nomoclastines (dorsal scutum length about 4.4 mm). Dorsal scutum rectangular, with coda region flaring. In the female, scutum is trapezoidal with two well-marked constrictions. Ocularium very wide (not so much in the females) ( Figures 4a View Figure 4 , 6a View Figure 6 ), not especially high. Chelicera and pedipalpus sexually dimorphic, extremely robust in male: basichelicerite stout, cheliceral hand kidney-like, swollen, pedipalp articles, especially femur, thickened and bearing immense dorsal protuberance. Metatarsus I sexually dimorphic, swollen only in male with a row of 19 short MtCS ( Figure 2a–c View Figure 2 ). Legs I–IV short and thin, contrasting with the sturdy body. Ventral plate trapezoid with rounded corners. Glans complex not sunken in a circular pit. Glans sac rectangular, multi-folded with ventral inflatable sac ( Figure 5c–f View Figure 5 ). Stylus thick, thumb-shaped, situated atop the glans sac. Macrosetae C1–C3, A1–A2 cylindrical elongate, laterally inserted. Macrosetae B absent. Macrosetae D and E extremely reduced ( Figure 5d–f View Figure 5 ). See discussion below for comparison of characters within the subfamily. Males with short comb of MtCS positioned on the distal third of the metatarsus.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Nomoclastidae

Loc

Liomma Roewer, 1959

Kury, Adriano B., Villarreal, Osvaldo & Medrano, Miguel 2024
2024
Loc

Liomma

Kury AB 2003: 25
2003
Loc

Liomma

Roewer C-F 1959: 72
1959
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