Paecilaema C. L. Koch 1839
Creators: name: Kury, Adriano B.
name: Medrano, Miguel
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Cosmetidae
Paecilaema

description: Key to the genera revalidated from the synonymy of Paecilaema
1. DS outline alpha-type; legs III-IV much stronger than I-II; Fe IV incrassate, armed with prolateral rows of strong spines.... 7
1’ DS outline beta-type or delta-type; legs III-IV comparable to I-II; Fe IV not incrassate, unarmed....................... 2
2. Varied white markings on scutum, but never forming a true lyra; scutal armature on area III weak; Fe IV thick, long; tarsal count of posterior legs high (II 15– 19, III 10– 12, IV 11 -–15)................................................... 3
2’ True lyra present; Fe IV very slender; scutal area III with pair of spines (except for P. muticum); tarsal count of posterior legs low to medium (II 9–14, III 6–8, IV 6–9)................................................................... 6
3. Scutal shape delta; scutal marking as a Discosomaticus -like ring; areas I and III with white rounded tubercles................................................................................................. Soaresella (Panama)
3’. Scutal shape beta, with variations; scutal markings without ring; area I unarmed, area III with small tubercles or granules... 4
4. Fe I to IV getting gradually thicker distally and covered with coarse granulation; Fe IV slightly curved, moderately long (8 mm).......................................................................... Pararhauculus (Costa Rica)
4’ Fe I-IV straight and uniform (not filiform), entirely smooth, elongate (longer than 14 mm)............................ 5
5. DS outline beta-classic; Ch hand dimorphic, strongly swollen in males; Fe IV very long (15 mm). Poecilaemula (Costa Rica)
5’. DS outline beta-diamond (with constrictions smoothed); Ch hand monomorphic; Fe IV extremely long (18 mm)............................................................................................ Paecilaemella (Ecuador)
6. Lyra rudimentary, only with inner outline; without diaphanous body and with large U-shaped fenestra magna; solid punctulations fused forming outline of FM and partly over the carapace groove, otherwise isolated along the laterals of dorsal scutum (Figs 5 A–C); low tarsal counts (6/ 13/6-7/6-7); Fe IV short (4.5 mm)............ Metavononoides (E Brazil, interior forest)
6’ True lyra present, with set of 6 fenestrae and containing diaphanous body, sometimes with different shades of pale; solid punctulations present but not restricted to lyra outline (Figs 4, 5 D–F, Figs 6 A–F); high tarsal counts (6–7/12– 18/7–9/7–10); Fe IV long (10 mm)......................................................... Paecilaema (E Brazil, coastal forest)
7. Scutal area III entirely unarmed; Fe IV of male with prolateral proximal row of spines, short (4.8 mm).................................................................................................. Meterginoides (Costa Rica)
7’. Scutal area III with pair of low acuminate tubercles; Fe IV of male with retro- and prolateral rows of strong spines, moderately long (7.3 mm)...................................................................... Meterginulus (Mexico)
description: Published as part of Kury, Adriano B. & Medrano, Miguel, 2018, A whiter shade of pale: anchoring the name Paecilaema C. L. Koch, 1839 onto a neotype (Opiliones, Cosmetidae), pp. 191-219 in Zootaxa 4521 (2) on page 215, DOI: 10.11646/zootaxa.4521.2.3, http://zenodo.org/record/2609787