Myrmecium coutoi, Silva-Junior & Bonaldo, 2019

Silva-Junior, Claudio J. & Bonaldo, Alexandre B., 2019, Four new species of Myrmecium Latreille, 1824 and complementary description of M. machetero Candiani & Bonaldo, 2017 (Araneae: Corinnidae: Castianeirinae), Zootaxa 4706 (2), pp. 391-400 : 396-397

Myrmecium coutoi sp. nov.

Fig. 4 A E

Type material. ♀ holotype, Cusco, Alto Shimaa , (12°35’32.78’’S 73°19’17.64’’W), Cusco, Peru, 28. IV .2007, leg. C. Ramirez ( MUSM 0504349 ) .

Etymology. The specific name is a patronym in honor of the first author’s father, Claudio de Jesus Silva, nick- named Couto.

Diagnosis. Females of M. coutoi sp. nov. are readily distinguished from all other Myrmecium species by the large copulatory openings in relation to the secondary spermathecae, longer neck and larger primary spermathecae ( Figs 4D, E ). Male: unknown.

Description. Female (holotype): carapace dark, smooth vitreous, covered with longs with hairs sternum smooth vitreous dark reddish-brown ( Figs 4A, B ); endites and labium reddish-brown; chelicerae dark reddish-brown ( Fig. 4C ). Abdomen brown and smooth, scutum small. Legs orange (in alcohol). Chelicerae: promarginal teeth 3; retromarginal teeth 5. Sternum and carapace not fused between legs II and III; coxae II separated from coxae III approximately twice coxae II width; sternal posterior plate T-shaped. Total length 10.20, carapace 5.64 long, 1.35 wide. Eye diameters: AME 0.14, ALE 0.10, PME 0.13, PLE 0.11. Leg measurements: I—femur 3.03 / tibia 3.00 / metatarsus 2.41; II—femur 2.58/ tibia 2.35 / metatarsus 1.93; III— femur 1.92 / tibia 2.18 / metatarsus 2.01; IV—femur 3.13 / tibia 2.89 / metatarsus 3.03. Leg spination: I—tibia vp1-0-1-1-0, vr0-0-1-1-0; metatarsus vp0-1-0-1-0, vr0-1-0-1-0. II—tibia vp0-0-0-1-0; metatarsus p1-0-0-0-0, vp0-0-1-0-0, vr1-0-0-1-0. III—tibia vp0-1-0-1-0, vr0-1-0-1- 0; vp1- 0-0-1-0, vr1-0-0-1-0. IV—tibia p0-0-1-0-0, vr0-0-0-1-0; metatarsus vp0-1-0-0-0, vr0-1-0-1-0. Copulatory openings positioned laterally, large and sclerotized, secondary spermathecae long and curved, separated from each other by about twice their width, neck long and narrow, primary spermathecae large and globose ( Figs 4D, E ).

Distribution. Known only from the type locality in Peru ( Map 1 ).

Figures

MAP 1. Distribution records of species of Myrmecium from Perú (white symbols, species recorded by Candiani & Bonaldo, 2017; red symbols, new species and new record of Myrmecium machetero Candiani & Bonaldo, 2017).

FIGURES 4A E. Myrmecium coutoi sp. nov.: A female, dorsal view; B same, lateral view; C same, ventral view; D epigynum, ventral view; E same, dorsal view. Abbreviation s: CO, copulatory duct; FD, fertilization duct; ST II, secondary spermathecae; ST I, primary spermathecae. Scale = 1mm.