Goeldia mirim Almeida-Silva & Brescovit 2024, sp. nov.
Creators: name: Almeida-Silva, Lina M.
name: Brescovit, Antonio D.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Titanoecidae
Goeldia
Goeldia mirim

description: Goeldia mirim sp. nov.
(Figs 1A; 15; 25)
Type material. Holotype male from Reserva Ecológica Inhamum (4°53’30”S 43°24’53”W), Caxias, Maranhão, Brazil, 20–23.IX.2007, J.F.B. Lima-Lobato et al. coll. (IBSP 99111). Paratypes: male and female with same data of holotype, 23–26.IV.2007 (IBSP 131088); male and female from Fazenda Tanguro, previously Fazenda Morro Azul (12°49’55”S 52°20’21”W), Canarana/Querência, Mato Grosso, Brazil, 28.V–20.IV.2006, D.F. Candiani & N.F. Lo-Man-Hung coll. (MPEG 10015, 10036).
Additional Material Examined. BRAZIL. Rondônia. Porto Velho, Caiçara, right bank of Rio Madeira, (9°26’25”S, 64°48’59”W) elev. 100 m, 1♀, 29.IX.2012, R.P. Indicatti (MZSP 51804, Fig. 1A); Maranhão: Caxias, Reserva Ecológica Inhamum (4°53’30”S 43°24’53”W), 3♂, 2–5.X.2007, J.B.F. Lima-Lobato et al. coll. (IBSP 129008-129009, 131086); 4♂, 23–26.IV.2007, J.B.F. Lima-Lobato et al. coll. (IBSP 131085–131088); 2♂, 9– 11.IX.2005 A. S. Costa coll. (IBSP 99112‒99113); 1♂, 1♀, 20–23.IX.2007, J.B.F. Lima-Lobato et al. coll. (IBSP 99109); Piauí: Brasileira / Piracuruca, Parque Nacional de Sete Cidades (4°5’56”S 41°5’56”W), 22♂, 8♀, 24– 29.VI.2007, L. Carvalho et al. coll. (MPEG 11301–11305, 11307–11319, 11322); Mato Grosso: Canarana / Querência, Fazenda Tanguro, former Fazenda Morro Azul (12°49’55”S 52°20’21”W), 21♂, 48♀, 4 juv., 28.V–20.IV.2006, D.F. Candiani & N.F. Lo-Man-Hung coll. (MPEG 10011–10052; 12269‒12270).
Etymology. The specific epithet is a noun and refers to the small size of the species.
Diagnosis. Goeldia mirim resembles G. goytacazes in size but differs by the presence of dorsal chevron marks in the opisthosoma, by the tegular process enlarged at the base and pointed at the tip (Fig. 16A), and by the conical patellar apophysis, almost straight and with apex blunt (Fig. 16B‒C). Females of Goeldia mirim differ from those of G. goytacazes by the rounded posterior margin of the epigynum median field, wide copulatory opening area with copulatory duct wall visible (Fig. 16E), and long vertical and horizontal spermathecae (Fig. 16F).
Description. Male (Paratype, MPEG 10015): Coloration: carapace with cephalic area dark brown and thoracic area brown; sternum, labium and femur I, brown; other leg segments yellowish brown with apex brown; metatarsus IV brown. Opisthosoma black with two pairs of pale brown spots on the anterior area and chevron marks from the middle to the end of the posterior dorsal area. Total length: 3.16. Carapace: length 1.59, width 1.2, height 0.72. Opisthosoma length 1.58, width 0.8. Clypeus: height 0.12. Eye diameters and interdistances: ALE 0.08; AME 0.06; PME 0.09; PLE 0.04; ALE–AME 0.07; AME–AME 0.05; PLE–PME 0.13; PME–PME 0.09; ALE–PLE 0.04; AME–PME 0.05. Chelicerae paturon: length 0.77. Leg measurements: I: femur 1.22/ patella 0.58/ tibia 1.16/ metatarsus 0.98/ tarsus 0.64/ total 4.58; II: 1.18/ 0.5/ 0.98/ 0.86/ 0.52/ 4.04; III: 0.96/ 0.46/ 0.78/ 0.8/ 0.42/ 3.42; IV: 1.28/ 0.48/ 1.04/ 1.14/ 0.44/ 4.38; Leg formula: 1423. Leg spination: femur I p1ap; tibia III p1ap. Palpal MLT with apex completely membranous and base short (Fig. 16C). Cymbium without macrosetae. Pars pendula thickening far from embolus tip (Fig. 16D). Spermatic duct short and bent at 6 o’clock (Fig. 16B).
Female (Paratype, MPEG 010036). Coloration: as in male but with legs slightly darker (Fig. 1A). Total length: 3.0. Carapace: length 1.35, width 1.05, height 0.78. Opisthosoma: length 1.65, width 1.0. Clypeus: height 0.13. Eye diameters and interdistances: AME 0.05; ALE 0.06; PME 0.07; PLE 0.09; ALE–AME 0.07; AME–AME 0.05; ALE–PLE 0.04; PLE–PME 0.15; AME–PME 0.06; PME–PME 0.09. Chelicerae paturon: length 0.6. Leg measurements: I: femur 0.98/ patella 0.35/ tibia 0.68/ metatarsus 0.63/ tarsus 0.45/ total 3.08; II: 0.88/ 0.35/ 0.63/ 0.65/ 0.45/ 2.95; III: 0.92/ 0.38/ 0.54/ 0.5/ 0.4/ 2.74; IV: 0.97/ 0.38/ 0.78/ 0.66/ 0.38/ 3.17; Leg formula: 1423. Leg spines absent. Epigynum with reduced rim (Fig. 16E). Copulatory duct wall visible at the copulatory opening area (Fig. 16E). Vertical spermathecae slender and apex of copulatory ducts acute (Fig. 16F).
Variation. Opisthosoma pattern may vary and spots can be fused in stripes. Length (10 ♂): total 3.0–4.0; carapace 1.65–1.75; femur I 1.15–1.76; (10 ♀): total 3.56–4.2; carapace 1.38–1.72; femur I 1.0–1.08. We observed in some females a vertical spermathecae divided at the apex.
Distribution. Central and northern Brazil: Maranhão, Rondônia, Piauí and Mato Grosso (Fig. 25).
description: Published as part of Almeida-Silva, Lina M. & Brescovit, Antonio D., 2024, Unraveling the mysteries of Goeldia Keyserling, 1891: revision, description of seven new species and first record from USA (Araneae: Titanoecidae), pp. 151-193 in Zootaxa 5428 (2) on pages 175-177, DOI: 10.11646/zootaxa.5428.2.1, http://zenodo.org/record/10847364