Metagonia sp.
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publication ID |
https://doi.org/ 10.1206/0003-0090(2000)254<0001:NWPSAP>2.0.CO;2 |
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persistent identifier |
https://treatment.plazi.org/id/03ACD276-8F62-FFD5-FD13-FD9A42983D99 |
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treatment provided by |
Felipe |
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scientific name |
Metagonia sp. |
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Metagonia sp. , ‘‘I.D. #5’’: Huber, 1999: fig. 18.
TYPE: Male holotype from Santa Teresa , Espírito Santo, Brazil ; Jan. 26, 1959 (A. M. Nadler), in AMNH .
ETYMOLOGY: Named for the collector.
DIAGNOSIS: Representative of group 1 above; distinguished from close relatives ( M. bonaldoa, argentinensis ) by the long, diverging clypeal apophyses (figs. 202, 207), the shape of the palpal femur apophysis (figs. 204, 206), and the procursus (figs. 208–209) (see Note below).
NOTE: This might be the male of the type species of Metagonia ( M. bifida Simon, 1893 , from Rio de Janeiro; see redescription in Huber, 1997b), as well as the male of M. heraldica Mello-Leitão and M. quadrifasciata Mello-Leitão (both from Rio de Janeiro). However, there are several (undescribed) species with very similar habitus in southeastern Brazil. More material of both sexes needs to be studied to either justify a synonymization, or support the present name as valid.
MALE (holotype): Total length 2.2, carapace width 0.75; leg 1: 23.8 (5.6+0.4 +5.7+10.8+1.3), tibia 2: 3.7, tibia 3: 2.4, tibia 4: 3.3; tibia 1 l/d: 72. Carapace ochreyellow with distinct brown mark (fig. 201), ocular area brown, distance PME-ALE small (~ 25% of PME diameter). Clypeus with light brown marks, with pair of long, diverging brown apophyses (fig. 202); sternum light brown with many small light spots, shape as in M. globulosa (cf. fig. 281). Chelicerae ochre-yellow, with pair of brown plates set with tiny tubercles (fig. 207), without modified hairs. Palps ochre-yellow to light brown, coxa without retrolateral apophysis, femur without proximal retrolateral apophysis but with large sclerotized prolater- al protrusion (figs. 204–206); procursus complex (figs. 208–209), consisting basically of main branch ending in strong spine (‘‘a’’), prolateroventral membrane, into which black sclerite seems to be suspended (‘‘b’’), prolateral black spine (‘‘c’’), and retrolaterov- entral hinged process (arrow); bulb consisting of simple globular part and tubular embolus ending in spine (fig. 204). Legs light ochre-yellow, patella and metatarsus basally darker; most hairs missing; tarsus 1 with ~ 25 pseudosegments. Opisthosoma bifid (fig.
203), gray with some large dark spots dorsally.
FEMALE: Unknown (see Note above).
DISTRIBUTION: Known only from type locality.
MATERIAL EXAMINED: BRAZIL: Espírito Santo: Santa Teresa: type above.
Metagonia bonaldoa , new species Figures 210–218 View Figs
TYPES: Male holotype, 43 2♀ paratypes, and one juvenile from Rancho Queimado , Santa Catarina, Brazil ; Nov. 15–18, 1995 (A. Bonaldo), in MCN (26920) .
ETYMOLOGY: Named for the collector of the type material.
DIAGNOSIS: Close relative of M. argentinensis Mello-Leitão , distinguished by the pair of bifid male clypeal apophyses (fig. 211), the shape of the procursus (figs. 212– 213), and the large oval epigynum (fig. 217) (see Note below).
NOTE: This species might be conspecific with M. heraldica Mello-Leitão and M. quadrifasciata Mello-Leitão. Both are from Rio de Janeiro, in both the males are unknown, and in both the type material is possibly lost. Given the large number of similar (undescribed) species in southeastern Brazil, I consider it more probable that the species described herein is in fact new.
MALE (holotype): Total length 2.9, carapace width 0.9, length 0.9; leg 1: 25.2 (6.1+0.4+6.4+10.8+1.5), tibia 2: 3.8, tibia 3: 2.3, tibia 4: 3.2; tibia 1 l/d: 64. Habitus as in fig. 210. Carapace yellowish, with brown pattern as in fig. 210; ocular area also brown, distance PME-ALE about 20% of PME diameter. Clypeus with broad brown band, with pair of distinctive apophses (fig. 211), sternum brown with light spots at bases of coxae and light triangular mark in center. Chelicerae brown, with modified hairs as in fig. 214. Palps ochre-yellow to brown, in general as in M. nadleri (cf. figs. 204–205), femur with pointed apophysis (fig. 215), procursus as in figs. 212–213. Legs yellowish, with hardly visible darker bands (cf. female), without spines, without curved and vertical hairs; retrolateral trichobothrium of tibia 1 at 12%; tarsus 1 with ~ 20 pseudosegments. Opisthosoma bifid (fig. 210), ochre, with blackish spots dorsally, genital plate rectangular, brown.
VARIATION: Tibia 1 in other male: 5.5; some males also have white spots on the opisthosoma.
FEMALE: Tibia 1 (N = 6) 4.1–4.9 (x¯ = 4.5). In general very similar to male, but dark pattern on carapace differs: pairs of radiating stripes do not contact marginal spots, ocular area not darkened, clypeus has only pair of dark spots above chelicerae. Rings on legs usually very distinct: femora and tibiae with three rings each (central ring palest). Epigynum dark brown, with strong striation frontally and two pairs of humps posteriorly (fig. 217), internally with pair of pore fields (fig. 216), and complicated system of sclerotized ducts (figs. 216, 218).
DISTRIBUTION: Known only from Santa Catarina ( Brazil).
MATERIAL EXAMINED: BRAZIL: Santa Catarina: Rancho Queimado: types above ; same locality, Oct. 8–11, 1994 (A. B. Bonaldo & L. Moura), 3♀ in MCN (26171) ; Ilha de Arvoredo , Oct. 15–16, 1993 (A. A. Lise), 13 2♀ in MCP (4033) ; Ilha João da Cunha, Porto Belo , Dec. 7, 1992 (R. G. Buss), 1♀ 1 juvenile in MCP (3128) ; Morr-Spitzkopf, Blumenau (27°01̍S, 49°01̍W), Feb. 2, 1996 (A. B. Bonaldo, A. Kury & R. Pinto-da-Rocha), 1♀ in MCN (27192) ; the following female is assigned tentatively (the epigynum is similar in shape, but smaller): Morro do Baú, Ilhota (26°48̍S, 48°57̍W), Feb. 4, 1996 (A. B. Bonaldo, A. Kury & R. Pinto-da-Rocha), 1♀ in MCN (27204) .
Metagonia argentinensis Mello-Leitão, 1945 Figures 66 View Figs , 113 View Figs , 147 View Figs , 219–224 View Figs
Metagonia argentinensis Mello-Leitão, 1945: 227–228 View in CoL ; figs. 2–3a.
TYPE: Female holotype from Puerto Igua-
zú, Misiones, Argentina; no date (M. von Bülow), in MLP (16.960) (not examined; see Note below).
NOTE: I have not seen the type material, but consider it highly probable that the specimens described herein are conspecific with the female holotype: first, Mello-Leitão’s description fits the specimens I have seen quite perfectly; second, I have seen material from the type locality; third, M. argentinensis has frequently been collected at various places in Rio Grande do Sul and Misiones, while the only other Metagonia I have seen from this region was a very different spider (close to M. delicata ).
DIAGNOSIS: Close relative of M. bonaldoa , distinguished by the pair of rounded male clypeal apophyses (fig. 219), the shape of the procursus (figs. 221–222), and the triangular epigynum (fig. 223).
MALE (Morro Santana, Rio Grande do Sul): Total length 2.5, carapace width 1.1, length 0.9; leg 1: 22.5 (5.7+0.4+5.6+9.3 +1.5), tibia 2: 3.3, tibia 3: 2.1, tibia 4: 3.1; tibia 1 l/d: 52. Habitus as in M. bonaldoa (cf. figs. 210–211). Carapace yellowish, with two pairs of brown stripes radiating toward posterior lateral margin, and three pairs of darker spots laterally on posterior half; ocular area not darkened, distance PME-ALE about 20% of PME diameter. Clypeus with broad brown stripe, with pair of distinctive apophyses (fig. 219), sternum brown with light spots at bases of coxae. Chelicerae brown, with modified hairs as in M. bonaldoa (cf. fig. 214). Palps ochre-yellow to brown, in general as in M. nadleri (cf. figs. 204–205), femur with point- ed apophysis (fig. 220), procursus as in figs. 221–222. Tarsal organ capsulate (fig. 66). Legs yellowish, with hardly visible darker rings (cf. female); without spines, without curved and vertical hairs; tarsus 1 with ~ 25 pseudosegments; retrolateral trichobothrium of tibia 1 at 13%. Opisthosoma bifid (cf. fig. 210), ochre, with blackish spots dorsally, genital plate light brown. Gonopore with four epiandrous spigots (fig. 113); ALS with several piriform gland spigots (fig. 147).
VARIATION: Tibia 1 in six males: 4.9–6.4 (x¯ = 5.8). Males from Salto do Yucumá with brown ocular area ; in some males rings on legs well visible.
FEMALE: Tibia 1 (N = 13) 4.0–4.7 (x¯ = 4.3). In general very similar to male, but rings on legs usually much more pronounced: fem- ora and tibiae with three rings each (central ring palest). Epigynum dark brown, triangular (fig. 223), internally with large undivided pore field (fig. 224), and complicated system of sclerotized ducts (figs. 224–225).
DISTRIBUTION: Known from southern Brazil (Rio Grande do Sul, Santa Catarina, Paraná) and northeastern Argentina (Misiones).
MATERIAL EXAMINED: ARGENTINA: Misiones: Pto. Bemberg, Oct. 1953 (Schiapelli), 2♀ in MACN. BRAZIL: Rio Grande do Sul: Morro Santana , May 17, 1980 (A. A. Lise), 13 in MCN (9080) ; Barragem, Passo do Inferno, São Francisco de Paula , Nov. 19, 1997 (M.A.L. Marquez), 13 in MCN (28869) ; São Francisco de Paula , May 30–June 2, 1996 (A. A. Lise), 13 1♀ in MCP (9901) ; Linha Cristina , Caxias do Sul, June 6, 1993 (M. B. Martins), 13 1♀ in MCP (4445) ; Santa Cruz do Sul, Nov. 20, 1994 (R. Ott), 13 1♀ in MCP (5057) ; Fazenda Raconto da Figueira, Arroio dos Ratos , Aug. 1, 1986 (A. D. Bres- covit), 23 2♀ in MCN (15534) ; Novo Hamburgo , Apr. 25, 1976 and July 28, 1986 (C. J. Becher), 13 2♀ in MCN (4081, 15455) ; Salto do Yucumá, Parque Estadal Doturo Tenente Portela , Jan. 16, 1985 (A. A. Lise), 23 1 juvenile in MCN (13003) ; Garruchas São Borfa , Nov. 6, 1979 (H. Bischoff), 1♀ in MCN (8716) ; São Leopoldo , June 12, 1992 (A. B. Bonaldo), 1♀ in MCN (24733) ; São Leopoldo , Sept. 1, 1986 and Sept. 28, 1987 (C. J. Becker), 3♀ 1 juvenile in MCP (328, 330, 375) ; Sander-Tres Coroas, Nov. 23, 1983 (E. H. Buckup), 1♀ in MCN (11838). Santa Catarina: Rodovia, Concordia-Seara (27°12̍S, 52°10̍W), Jan. 30, 1996 (A. B. Bonaldo, A. Kury & R. Pinto-da-Rocha), 1♀ in MCN (27150) ; Paraná: Foz do Iguaçu , night collecting on railing of path, Mar. 24, 1985 (H. & L. Levi), 5♀ 2 juveniles in MCZ .
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