Ammonius benoiti, Guadanucci & Brescovit, 2023

Gonzalez-Filho, Hector M. O., Guadanucci, José Paulo L. & Brescovit, Antonio D., 2023, On the genus Ammonius Thorell, 1899 (Mygalomorphae, Barychelidae): description of the female of A. pupulus, a new species and new distribution records, European Journal of Taxonomy 861 (1), pp. 113-131 : 124-127

publication ID 10.5852/ejt.2023.861.2071

publication LSID


persistent identifier

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scientific name

Ammonius benoiti

sp. nov.

Ammonius benoiti sp. nov.

Figs 8–10 View Fig View Fig View Fig


Ammonius benoiti sp. nov. is differentiated most readily by having six eyes, AME is absent ( Fig. 9A–B View Fig ). Males of A. benoiti can be additionally distinguished from A. pupulus by the thickened embolus with a slight curve at the tip ( Fig. 8F–I View Fig ), the presence of the tibial thorns on the retrolateral side of the palp ( Figs 8D–E View Fig , 9D View Fig ), and an apical megaspine on the tibia I ( Figs 8J View Fig , 9C View Fig ). Female unknown.


The specific name is a patronym in honor of the Belgian arachnologist Pierre L.G. Benoit, for his great contributions to the knowledge of African Barychelidae .

Type material

Holotype IVORY COAST – Appouesso • ♂; 06°35′ N, 003°28′ W; 29 Sep. 1993, R. Jocqué & N. Séabé leg.; RMCA 202482 View Materials . GoogleMaps

Paratype IVORY COAST – Appouesso • 1 ♂; same collection data as for preceding; 1 Dec.1994; RMCA 202354 View Materials .

Only type material known.


Male (holotype RMCA 202482) Total length: 3.92. Carapace: 1.66 long, 1.32 wide. Thoracic fovea: 0.08 wide, straight. Clypeus 0.03 long. Eye tubercle flat 0.14 long, 0.21 wide. Anterior and posterior eyes row straight ( Fig. 9B View Fig ). Eyes diameters and interdistances: AME absent, ALE 0.08, PME 0.04, PLE 0.05; ALE–PME 0.01, PME– PME 0.01, PLE–PME 0.01, ALE–ALE 0.01. Labium: rectangular, 0.09 long, 0.311 wide, having two

cupules rounded ( Fig. 8B View Fig ). Chelicerae: 9 prolateral teeth and 7 tiny on inner edge. Labiosternal groove shallow, flat, with pair of sigilla. Maxillae: 0.52 long, 0.27 wide, with 20 cuspules. Heel reduced. Anterior lobe short, not projected ( Fig. 8B View Fig ). Sternum 0.97 long, 0.82 wide. Abdomen: 2.26 long, with book lungs semi-circular, elliptical aperture, and book lungs combs absent. Measurements: palp (femur, patella, tibia, cymbium, total): 0.8, 0.4, 0.6, 0.7, 2.5. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 1.3, 0.6, 1, 0.9, 0.7, 4.5; II: 1.1, 0.6, 0.9, 0.9, 0.6, 4.1; III: 1, 0.6, 0.7, 0.8, 0.6, 3.7; IV: 1.5, 0.7, 1.1, 1.1, 0.8, 5.2. Spination: Leg I: femur d1-1-1-0, patella v0-1-0, tibiav0-1-1-1p-1p-1ap, metatarsus v0-1-1ap; II: femur d0-1-0, patella v0-0-1, tibia v0-1-1-0, d0-1p-1, metatarsus v0-1-0-1-1ap; III: femur d0-1-0-1-1p-1ap, patella v0-1p, tibia v0-1-1-1r, p0-1-1-2ap, metatarsus v0-2-1-1p-2-1r-4ap; IV: femur d0-1-1-1p, patella d0-1, tibia v0-1-1-1p-1r-0-1ap, d0-1-0-0-1, metatarsus v0-1-1p-1-2-1-0-0-3ap, d0-1r-0-1p-1ap. Claws: ITC absent. STC on tarsus with teeth on both lateral edges. Scopulae: on metatarsi I–II ⅓ scopulate, metatarsi III–IV absent; on tarsi I fully scopulate, tarsi II ⅓ scopulate and tarsi III–IV 1/5 scopulate. Spinnerets: PMS: 0.28 long. PLS: basal 0.33 long, median 0.31 long, apical 0.23 long. Apical segment digitiform. Tibia I with megaspine curved at apical end on the prolateral side ( Figs 8J View Fig , 9C View Fig ).

Palp without tibial concavity. Tibial thorns forming a group of 15 conical spines on the retrolateral side of the tibia ( Figs 8D–E View Fig , 9D View Fig ). Cymbium with retrolateral lobe triangular, strongly projected, slightly curved ( Fig. 8C–E View Fig ). Bulb with long embolus slightly curved at the tip, embolar base narrow ( Fig. 8F–I View Fig ).

Habitus as in Fig. 8A–B View Fig . Color in alcohol: Carapace and legs dorsally yellowish brown. Eye tubercle black.




Ivory Coast ( Fig. 10 View Fig ).













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