Corresponding author: Bastian Drolshagen (
Academic editor: Rudy Jocqué
Information on the genus
The genus
Material and methods follow
Instituto Butantã, São Paulo Staatliches Museum für Naturkunde Karlsruhe Muséum National d’Histoire Naturelle, Paris Universidade de São Paulo, Museu Paulista The Natural History Museum, London (formerly British Museum, Natural History) Naturhistorisches Museum, Wien Forschungsinstitut und Naturmuseum Senckenberg, Frankfurt am Main Drolshagen private collection
Examined (type-) material:
1 | Female or juvenile | 2 |
– | Male | 4 |
2 | Tarsal claw of pedipalps with one row of teeth | 3 |
– | Tarsal claw of pedipalps with a double row of teeth |
|
3 | Fovea slightly recurved, not inverted U–shaped; approximately 30–40 maxillary cuspules; posterior pair of sternal sigilla circular |
|
– | Fovea strongly recurved, inverted U–shaped; approximately 40–50 maxillary cuspules; posterior pair of sternal sigilla oval | |
4 | Palpal organ long, bulbus narrow [PL(100)/BD = 251]; tubercle in basal third of metatarsus I absent |
|
– | Palpal organ short, bulbus wide [PL(100)/BD = 147]; tubercle in basal third of metatarsus I present |
Male holotype and 1 female paratype (SMNK) from Saint Georges, French Guiana,
PCD–33–306–03 1 imm of
The specific epithet, a feminine genitive singular, refers to the Oiapoque river, which is close to the type locality.
Colour in alcohol: carapace, legs and pedipalps mahagony brown, chelicerae red, opisthosoma grey. Carapace (length: 11.67; width: 10.38) covered with soft grey setae and longer, black setae in posterior thoracic area; margin with long, black setae and soft, silver setae; clypeus present, narrow; fovea slitlike, recurved, inverted U–shaped; striae marked. Chelicerae with two retrolateral bands of plumose setae and one dorsal band, broadening to full width of chelicerae distally; ventrally with one row of 9 teeth (1–1–1–1–5) on promargin; cheliceral furrow with a field of small basomesal teeth; retroventral base with isolated bristles. Maxillae with prolateral lyra consisting of 7 hookshaped bristles (as in the female paratype - viz.
Colour in alcohol: resembles male holotype, but legs darker. Carapace (length: 13.26; width: 12.54) and opisthosoma (length: 17.37; width: 7.58) larger than that of holotype. Different from male holotype by the presence of one more labial cuspule and several more cuspules on basal inner corner of maxillae (
Although the number of lyra bristles varies during the development of this species, the paratype of
According to Thomas Vinmann (pers. comm.), who collected the specimens examined, females build large sheetwebs of
Measurements of male holotype and female paratype (in parenthesis) of
Leg I | Leg II | Leg III | Leg IV | Pedipalp | |
---|---|---|---|---|---|
Fe | 17.96 (13.34) | 15.05 (12.54) | 13.34 (11.18) | 15.77 (13.47) | 8.05 (7.95) |
Pa | 6.75 (6.58) | 5.52 (6.06) | 3.70 (5.19) | 5.05 (6.05) | 3.31 (4.13) |
Ti | 15.38 (10.50) | 12.79 (10.08) | 13.54 (8.38) | 13.77 (10.89) | 6.28 (6.23) |
Mt | 17.65 (10.27) | 15.59 (10.05) | 15.11 10.48) | 17.69 (14.27) | - |
Ta | 10.63 (7.03) | 8.91 (6.89) | 8.19 (6.44) | - (7.24) | 3.12 (6.58) |
Total | 68.37 (47.72) | 57.86 (45.62) | 53.88 (41.67) | 52.28 (51.92) | 20.76 (24.89) |
Diameter of Fe | 2.61 (2.97) | 2.51 (2.91) | 2.38 (2.58) | 2.47 (2.83) | - |
Proportion | 3.82 (6.22) | 4.34 (6.38) | 4.42 (6.84) | - (5.45) | - |
We want to thank Janet Beccaloni (NHM), Christine Rollard (MNHN), Christoph Hörweg (MNHW), Peter Jäger (SMF) and Hubert Höfer (SMNK), who granted us access to their collections. Furthermore we want to thank Thomas Vinmann and Gordon Telford for information regarding the ecology of