Category:Euagrinae

From Dipluridae

Euagrinae Raven, 1979
Systematic
Order: Araneae
Infraorder: Mygalomorphae
Family: Dipluridae

Contents 1 Diagnosis 2 Description 3 Genera included 4 Key to the species of Euagrinae 5 In synonymy 6 References

Diagnosis

Euagrinae can be distinguished from the Diplurinae and Ischnothelinae by the absence of maxillary cuspules, and from the Masteriinae by the serrula being a broad area of short denticles.

Description

Carapace very flat, hirsute; fovea small, pitlike, very short, subcentral, longitudinal, or absent. Eye group wider than long. Clypeus absent or indistinct. Chelicerae small; only one margin with teeth. Intercheliceral tumescence present or absent. Maxillae rectangular, anterior lobe indistinct; cuspules absent. Labium much wider than long, without cuspules. Labiosternal suture laterally wide. Sternum cordate, narrow or wide; all sigilla oval, marginal, or large and subcentral. Third leg usually longer than first or second. Legs elongate, at least tarsi III and IV spinose. Metatarsal preening combs present or absent. Males with unsegmented tarsi; cymbium bilobed, spinose or aspinose. Palpal bulb pyriform with short or elongate embolus. Tibia I of males with raised pectinate process, dorsally flattened, with mid-distal spur, or bare; metatarsus I with proximal thorn or bare. Tibia II bare, with distal pectinate process, or with pre-distal spur and megaspine. Paired claws with one S-shaped row of teeth; unpaired claw curved with few long, fine teeth. Scopulae entirely absent in both sexes. Posterior median spinnerets with australotheline crescent of hirsute cuticle isolated by pallid glabrous tissue anterior to bases or crescent absent. Posterior lateral spinnerets elongate; lateral and middle subsegments subequal, apical segment pseudosegmented or elongate. Spermathecae consisting oftwo entire or divided receptacula seminins.

Genera included

• Allothele Tucker, 1920 — Africa
• Australothele Raven, 1984 — Australia
• Caledothele Raven, 1991 — Australia
• Carrai Raven, 1984 — New South Wales
• Cethegus Thorell, 1881 — Australia
• Euagrus Ausserer, 1875 — Southern USA to Costa Rica, South Africa, Taiwan
• Microhexura Crosby & Bishop, 1925 — USA
• Namirea Raven, 1984 — Australia
• Phyxioschema Simon, 1889 — Central Asia
• Stenygrocercus Simon, 1892 — New Caledonia

Key to the species of Euagrinae

1. Fovea a small pit; anterior median eyes very small or absent ..........2
– Fovea longitudinal; anterior median eyes normal ..........Microhexura
2. Australotheline crescent absent ..........3
– Australotheline crescent present ..........4
3. Apical segment of PLS pseudosegmented; males with a row of modified spines retroventrally on patella ..........Phyxioschema
– Apical segment of PLS entire; males without a row of modified spines retroventrally on patella ..........Euagrus
4. Metatarsal preening combs present ..........5
– Metatarsal preening combs absent ..........6
5. Spines few or absent on tarsi II; tibia II of males without spur ..........Stenygrocercus
– Several spines on tarsi II; tibia II of males with distinct spur ..........Namirea
6. Fovea present, pitlike ..........7
– Fovea absent ..........Carrai
7. Tibia II of males with spur ..........8
– Tibia II of males without spur ..........Cethegus
8. Metatarsus II of males with ventral thorn ..........Australothele
– Metatarsus II of males without thorn ..........Allothele

In synonymy

Afghanothele Roewer, 1960 = Phyxioschema Simon, 1889 (Raven, 1985a: 148).
Palaevagrus Simon, 1908 = Cethegus Thorell, 1881 (Main, 1960: 30).

References

• Platnick, Norman I. (2009): The world spider catalog, version 10.0. American Museum of Natural History.
• Raven, Robert J. (1985): The spider infraorder Mygalomorphae (Araneae): Cladistics and systematics. Bull. Am. Mus. nat. Hist. 182: 1-180.PDF