Sidymella excavata
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Machado2019ZoosystematicsandEvolution95, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Machado2019Zoosystematics and Evolution95">{{Citation See also the citation download page at the journal. |
Ordo: Araneae
Familia: Thomisidae
Genus: Sidymella
Name
Sidymella excavata Machado & Guzati sp. nov. – Wikispecies link – ZooBank link – Pensoft Profile
Type material
Holotype ♀, ECUADOR: Cerro Troya, Carchi, 0°43'59.7"N, 77°41'00.3"W, L. Pena leg. (MCZ 133396). Paratypes: ♂, ECUADOR: Pichincha, 0°15'00.0"S, 78°35'00.0"W, 19.iv.1988, W. Maddison leg. (MCZ 133397); ♀, COLOMBIA: Cundinamarca, Mosquera (Mondoñedo), 4°41'0.06"N, 74°15'0.25"W, 20.x.2000, E. Florez & J. Pinzon leg. (ICN 3404).
Material examined
COLOMBIA: 2j, Magdalena (Santa Marta), 11°12'54"N, 74°06'01"W, 18.iv.1977, W. Galvis & A.J. Moreno leg. (ICN-Ar 9140); 1♀ 1j, Quindío (Estación Bremen), 4°40'0"N, 75°39'0"W, 14–20.iv.1998, P. Ariza leg. (MPUJ 45511); 1♀, 1j, same data as preceding (MPUJ 11490); 1♀, Cundinamarca, Mosquera (via a La Mesa), 4°40'12.0"N, 74°16'00.7"W, 20.x.2000, E. Florez & J. Pinzon leg. (ICN-Ar 3404); 2♀, Mosquera (Desierto de Zabrinsky), 4°44'30"N, 74°14'8"W, 23.ii.2002, L. Benavides, C. Niño, A. Castañeda & G. Mora leg. (ICN-Ar 2157); 2♀, 5j, 06.iv.2002, same locality and collectors (ICN-Ar 2146); 4♀, 7j, same locality, April 2006, J. Martínez leg. (ICN-Ar 10500); 1♀, 23.ii.2002, same locality, C. Niño, G. Mora, A. Castañeda & J. Martínez leg. (CAUD-216-ARA 139); 1♀, 27.vii.2002, same locality, J. Martínez, C. Niño & G. Mora leg. (CAUD-216-ARA 366); 1♀, iv.2002, same locality, C. Niño, G. Mora, A. Castañeda & J. Martínez leg. (CAUD-216-ARA 1944); 1♀, 08.ix.2016, same locality, D. Molina leg. (ICN-Ar 10449); 1♀, same data as preceding (ICN-Ar 10498). 1♀, 2j , Boyacá, Villa de Levya, 5°40'21"N, 73°27'42"W, 09.vi.2001, L. Benavides leg. (ICN-Ar 1248). 1♂, Valle del Cauca, Saladito, 3°34'15.78"N, 76°36'9.27"W, W. Eberhard leg. (MCZ 133395). ECUADOR: 1♂, Quito, Pichincha, 0°15'00"S, 78°35'0"W, 19.iv.1988, W. Maddison leg. (MCZ 133397). 1♂, 2j, Azuay, Cerro Tinajillas, 3°10'60"S, 79°02'00"W, 18–21.iii.1965, L. Pena leg. (MCZ 133403). PERU: 1♂, Chavin, Ancash, 9°25'56"S, 77°32'07"W, 14.i.1972 (MACN-Ar 19068). ARGENTINA: 3♂, 4 j, Catamarca, Las Chacritas, 27°41'19.25"S, 65°55'24.97"W, 20.i.1987, P. Goloboff leg. (MACN-Ar 19098).
Etymology
The specific name refers to the shape of the anterior border of the opisthosoma with a remarkable median re-entrance/excavation.
Diagnosis
Females of S.excavata sp. nov. resemble those of S.marmorata sp. nov. by the large body size, short opisthosomal projections and long copulatory ducts; however, they can be distinguished by the presence of long needle-shaped macrosetae on the ocular area (Fig. 4B), and by having five mesial macrosetae on femora I and II (Fig. 4A). Males are similar to those of S.lucida, but can be recognized by cephalic setae and a basal branch of the RTA which is truncated instead of conical (Fig. 5C–F).
Description
Female: Prosoma, sternum and legs totally orange; legs I and II covered by numerous spiniform setae; opisthosoma predominantly light-yellow with a dark median stain on the dorsum that splits posteriorly towards to the tips of the projections (Fig. 4A). Epigynum with a wide septum formed by the median junction of the posterior folds of the epigynal plate (Fig. 4C, E); copulatory ducts hyaline, long and coiled, leading to a pair of walnut-shaped spermathecae (Fig. 4D, F). Measurements: eyes sizes and interdistances: AME 0.03, ALE 0.09, PME 0.05, PLE 0.03, AME–AME 0.15, AME–ALE 0.09, PME–PME 0.17, PME–PLE 0.17, MOQ length 0.41, MOQ width 0.17; leg formula: 1–2–4–3: leg I – femur 3.40/ patella 1.36/ tibiae 3.04/ metatarsus 2.04/ tarsus 0.88/ total 10.72; II – 2.68/ 1.12/ 2.08/ 1.72/ 0.68/ 8.28; III – 1.40/ 0.72/ 0.88/ 0.80/ 0.60/ 4.44; IV – 1.76/ 0.76/ 1.12/ 0.96/ 0.60/ 5.20. Total body length 5.48; prosoma 2.48 length, 2.04 wide; opisthosoma length 3.00; clypeus 0.35 height; sternum 1.12 length, 1.04 width; endites 0.56 length, 0.20 width; labium 0.32 length, 0.36 width.
Male: Prosoma yellow with a darker median stain; legs I and II yellow with brownish spots on the femoral setiferous tubercles and at the distal portion of each leg segment; legs III and IV light-yellow. Opisthosoma as in female (Fig. 5A). Palpi with a well-developed pars pendula and embolus emerging at three o’clock, curling at the tip (Fig. 5C–F); basal branch of RTA stout and directed retro laterally while the RTA is short, rounded and oriented vertically (Fig. 5D, F). Measurements: eyes diameters and eyes interdistances: AME 0.05, ALE 0.07, PME 0.05, PLE 0.05, AME–AME 0.13, AME–ALE 0.05, PME–PME 0.11, PME–PLE 0.13, MOQ length 0.17, MOQ width 0.11; leg formula: 1–2–4–3: leg I – femur 2.04/ patella 0.72/ tibiae 1.92/ metatarsus 1.68/ tarsus 0.76/ total 7.12; II – 1.44/ 0.60/ 1.20/ 1.12/ 0.60/ 4.96; III – 0.72/ 0.60/ 0.56/ 0.40/ 0.40/ 2.68; IV – 0.96/ 0.36/ 0.60/ 0.52/ 0.40/ 2.84. Total body length 3.12; prosoma 1.56 length, 1.24 wide; opisthosoma length 1.56; clypeus 0.19 height; sternum 0.68 length, 0.62 width; endites 0.35 length, 0.13 width; labium 0.17 length, 0.25 width.
Distribution
COLOMBIA: Magdalena, Quindío, Cundinamarca, Boyacá, and Valle del Cauca; ECUADOR: Pichincha and Azuay; PERU: Chavin; ARGENTINA: Catamarca (Fig. 15).
Original Description
- Machado, M; Guzati, C; Viecelli, R; Molina-Gómez, D; Augusto Teixeira, R; 2019: A taxonomic review of the crab spider genus Sidymella (Araneae, Thomisidae) in the Neotropics Zoosystematics and Evolution, 95(2): 319-344. doi
Images
|
