Meri formosus Rheims & Jäger 2022, comb. nov.
Creators: name: Rheims, Cristina A.
name: Jäger, Peter
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Meri
Meri formosus

description: Meri formosus (Banks, 1929) comb. nov.
Figs 150–161, 316
Olios formosus Banks, 1929: 79, plate 4, fig. 74 (female holotype from Barro Colorado Island [9.1636, ‑79.8378], Canal Zone, Panama Oeste, Panama, deposited in MCZ 21376, examined). Jäger, 2020: 81 (misplaced in Olios).
Additional material examined. PANAMA: Colón: 1♀, Frijoles [9.1733, ‑79.7967], 25 January 1958, A.M. Chickering leg. (MCZ 69147); Panama Oeste: 1♀, Canal Zone, Barro Colorado Island [9.1636, ‑79.8378], 3–20 April 1953, A.M. Nadler leg. (AMNH); 1♀, same locality as previous specimen, 28 July 1936, A.M. Chickering leg. (MCZ 69127); 1♀, same locality as previous specimen, 18 August 1939, A.M. Chickering leg. (MCZ 69128); 1♀, same locality as previous specimen, 1–31 August 1950, A.M. Chickering leg. (MCZ 69130); 1♀, same locality as previous specimen, 26 June 1929, A.M. Chickering leg. (MCZ 69132); 1♀, same locality as previous specimen, 30 June 1936, A.M. Chickering leg. (MCZ 69140); 1♀, Forest Preserve [9.1167, ‑79.7167], 28 February 1958, A.M. Chickering leg. (MCZ 69139); 1♀, same locality as previous specimen, 25 July 1954, A.M. Chickering leg. (MCZ 69143); Veraguas: 1♂, Farfan [7.6899, ‑81.2212], 9 January 1958, A.M. Chickering leg. (MCZ 99615). COLOMBIA: Antioquia: 1♀, Rio Clara [5.5833, ‑75.8667], 27 July 1983, F. Coyle leg. (AMNH).
Diagnosis. Males of M. formosus resemble those of M. guri spec. nov. (Figs 162–165) by the palp with RTA with rounded base and abruptly narrowed towards tip in retrolateral view. They are distinguished from the latter species by the tegulum not indented prolaterally and embolus with membranous region short, not surpassing half embolus length (Figs 151, 153) (tegulum strongly indented prolaterally and embolus with membranous region long, surpassing half embolus length in M. guri spec. nov.). Females are distinguished from all congeners by the epigyne with MS roughly trapezoid, slightly longer than wide, with EP rectangular, wider than long, opening slightly anterior to posterior margin of MS (Fig. 154) and vulva with GP more than three times longer than wide and SP with constrictions (Fig. 155).
Description. Male (MCZ 99615): Total length 11.0. Prosoma 5.1 long, 4.7 wide. Opisthosoma 5.5 long, 3.2 wide. Eyes: diameters 0.37, 0.32, 0.25, 0.32; interdistances: 0.30, 0.15, 0.45, 0.32, 0.30, 0.22. Legs: I: 27.9 (7.6, 2.9, 7.7, 7.8, 1.9); II: 30.3 (8.3, 2.8, 8.6, 8.5, 2.1); III: 19.6 (6.0, 2.0, 5.1, 5.0, 1.5); IV: 22.7 (6.7, 2.0, 6.0, 6.3, 1.7). Spination follows the generic pattern. Palp: PTA triangular, wider than long; cymbium with small retro proximal projection; subtegulum not visible in ventral view; tegulum slightly protruding over conductor base; conductor, widest at base, distally fanned; embolus with large membranous region bearing long needle-like projections, subdistally curved (Figs 150–153, 157–159).
Redescription. Female (AMNH): Total length 13.5. Prosoma 6.0 long, 5.8 wide. Opisthosoma 7.4 long, 4.8 wide. Eyes: diameters: 0.44, 0.38, 0.28, 0.36; interdistances: 0.36, 0.26, 0.68, 0.70, 0.30, 0.30. Legs: I: 24.6 (7.0, 2.7, 6.5, 6.5, 1.9); II: 30.5 (8.4, 3.4, 8.3, 8.2, 2.2); III: 21.6 (6.4, 2.7, 5.5, 5.3, 1.7); IV: 23.9 (7.2, 2.6, 6.0, 6.3, 1.8). Epigyne: EF longer than wide; MAB short, slightly conspicuous; HP rectangular, three times wider than long; LL touching posteriorly (Figs 154, 160). Vulva: internal ducts with FW mediad; GP arising from ducts at first turn; SP elongate; FD antero-laterad (Figs 149–150, 155).
Variation. Females (n = 10): total length 14.0–17.5; prosoma length 5.2–6.7; femur I length 7.1–8.3.
Distribution. Known from central Panama to western Colombia (Fig. 316)
description: Published as part of Rheims, Cristina A. & Jäger, Peter, 2022, Revalidation of the genus Sadala Simon, 1880 with the description of a new genus of Neotropical huntsman spiders (Araneae, Sparassidae), pp. 1-80 in Zootaxa 5135 (1) on pages 43-45, DOI: 10.11646/zootaxa.5135.1.1, http://zenodo.org/record/6550195