Anibontes mimus Chamberlin 1924

Dupérré, Nadine, 2013, Taxonomic revision of the spider genera Agyneta and Tennesseellum (Araneae, Linyphiidae) of North America north of Mexico with a study of the embolic division within Micronetinae sensu Saaristo & Tanasevitch 1996, Zootaxa 3674 (1), pp. 1-189 : 178-180

Anibontes mimus Chamberlin 1924

Figs 32 , 588–598 , map 40

Anibontes mimus Chamberlin 1924: 6 , pl. 1, f. 6–7. (Description 3).

Bathyphantes dentichelis Chamberlin 1925: 123 , f. 34 (Description 3). (Holotype 3 from Louisiana, New Orleans, R.V. Chamberlin Coll., MCZ). Examined.

Meioneta grayi Barnes 1953: 5 , f. 3–4. (Description 3). (Holotype 3 from North Carolina, Beaufort, Carteret Co., July 15, 1952, coll. R.D. Barnes, AMNH). EXAMINED. NEW SYNONYMY.

Type material: Anibontes mimus Chamberlin 1924 , 3 HOLOTYPE from Louisiana, New Orleans, June, H.G. Hubert, Cat. No. 569, ( MCZ). EXAMINED.

Diagnosis: Males and females are easily distinguished from all North American Linyphiidae by their strongly reticulate sternum, not extending between the coxae ( Fig. 593 ) and their carapace and abdomen color patterns ( Figs 592, 595 ). Furthermore the males are diagnosed by their chelicerae bearing a row of tubercles on their anterior surface ( Fig. 594 ).

Description: Male: Total length 1.94; carapace length 0.939, width 0.63.

CEPHALOTHORAX: Carapace elongated, bright orange-yellow, shiny, coarsely reticulate; radiating lines, sides and margin suffused with gray ( Fig. 592 ). Sternum bright orange, reticulate not reaching between coxae ( Fig. 593 ). Clypeus height 4. Chelicerae bright orange, excavated; with row of six large seta-tipped tubercles, the last three very large ( Fig. 594 ); promargin four teeth and no projection, retromargin without denticles but with pointed projection near base of fang. Cheliceral stridulatory organ ~75 striae, extremely narrowly spaced. ABDOMEN: Patterned, off-white with two, wide transverse dark grayish band and an apical narrow one ( Fig. 592 ). LEGS: Yellow, tip of femur, tibia and base of patella with dark gray spot; leg I total length: 3.51; leg III total length: 1.86; Tm I: 0.33, Tm IV: absent. GENITALIA: Palpal retrolateral tibial apophysis rounded, slightly rugose; dorsal tibial apophysis wide, smooth; two retrolateral trichobothria and one dorsal ( Fig. 588 ). Cymbium rounded; glabrous depression absent ( Fig. 588 ); prolateral notch shallow; dorsal cymbial tubercle pointed, smooth; ventral tubercle absent ( Fig. 589 ). Paracymbium with two setae on anterior part, apical pocket medium, anterior pocket absent, posterior pocket very long ( Fig. 588 ). Embolus tip rounded, broad; Fickert’s gland absent; ventral lamella reduced, pointed; thumb long, extending beyond the embolus proper ( Fig. 590 ). Embolus proper set apically, not associated with the embolus tip, ventral and dorsal part about equal; with associated, large serrated process ( Fig. 590 ). Anterior terminal apophysis narrow, with no protrusions; posterior terminal apophysis absent; lamella characteristica broad, curved ( Fig. 591 ).

Female: Total length 1.91 carapace length 0.81, width 0.63.

Carapace oval, orange, shiny, reticulate; radiating lines, sides and margin strongly suffused with gray ( Fig. 595 ). Sternum bright orange, reticulate not reaching between coxae. Clypeus height 2. Chelicerae not excavated, dark gray transverse band present; promargin five teeth, retromargin five denticles. Cheliceral stridulatory organ ~17 striae, well spaced throughout. ABDOMEN: Patterned, off-white with broken zigzag dark mark ( Fig. 595 ). LEGS: Same as male; palpal segments dark, palpal claw absent; leg I missing; leg III missing; Tm IV: absent. GENITALIA: Epigynum with long and narrow proximal part of scape; epigynal slits long and slender; pit hook depression small ( Fig. 566 ); lateral lobes brief and wide; stretcher small; pit deep ( Fig. 597 ). Median part of scape short; genital pores situated in the middle of the median part of scape ( Fig. 598 ). Internal genitalia with small oval, ventral receptacula and a large triangular dorsal one ( Figs 597, 598 ).

Other material examined: USA: Florida: 12km NNW Stuart (27.17N, 80.17W), 12.xii.1962, 13, W. Ivie ( AMNH). Georgia: Savannah, W 80º51’: N 32º0’, May 4, 1943, beach, 1Ƥ, W. Ivie collector (misidentified as A. decorata ) ( AMNH). Mississippi: St. Louis Bay, mouth of Jourdan River, 22.iv.1982, Spartina cynosuroides marsh, 131Ƥ, M. Lasalle ( AMNH).

Distribution: Southeastern, USA.

MAP. 40. Localities of Anibontes mimus Chamberlin 1924 .

Figures

FIGURES 31 – 33. Tracheal system, dorsal view. 31. Agyneta decora (O. Pickard-Cambridge 1871). 32. Anibontes mimus Chamberlin 1924. 33. Tennesseellum formicum (Emerton 1882).

FIGURES 588 – 598. Anibontes mimus Chamberlin 1924. 588 – 594, Male. 595 – 598, Female. 588. Palp, retrolateral view. 589. Palp, prolateral view. 590. Embolus, prolateral view. 591. Radical division, retrolateral view. 592. 595. Habitus, dorsal view. 593. Sternum, ventral view. 594. Chelicerae, anterior view. 596. Epigynum, dorsal view. 597. Internal genitalia, ventral view. 598. Internal genitalia, dorsal view.

FIGURES 562 – 569. Agyneta decorata (Chamberlin & Ivie 1944). 562 – 566, Male. 567 – 569, Female. 562. Palp, retrolateral view. 563. Palp, prolateral view. 564. Embolus, prolateral view. 565. Radical division, retrolateral view. 566. 567. Abdomen, dorsal view. 568. Internal genitalia, ventral view. 569. Internal genitalia, dorsal view.