Idiops petiti ( Guérin, 1838 )

Fonseca-Ferreira, Rafael, Guadanucci, José Paulo Leite, Yamamoto, Flávio Uemori & Brescovit, Antonio Domingos, 2021, Taxonomic revision of the Neotropical spiders of the genus Idiops Perty, 1833 (Araneae, Idiopidae), with description of four new species, European Journal of Taxonomy 780 (1), pp. 1-71 : 47-50

publication ID

https://doi.org/ 10.5852/ejt.2021.780.1581

publication LSID

lsid:zoobank.org:pub:932663A6-D83D-49E0-B1F7-87F7DA8DC086

DOI

http://doi.org/10.5281/zenodo.5762243

persistent identifier

https://treatment.plazi.org/id/03B4126E-E843-FF9E-EE35-FCEFFE38FC8E

treatment provided by

Felipe

scientific name

Idiops petiti ( Guérin, 1838 )
status

 

Idiops petiti ( Guérin, 1838)  

Figs 3B View Fig , 26 View Fig

Acanthodon petitii Guérin, 1838: 163   , pl. 47 figs 1–8.

Acanthodon santaremia O. Pickard-Cambridge, 1896: 733   , pl. 34 fig. 13. Syn. Nov.

Idiops crulsi Mello-Leitão, 1930: 55   , fig. 2. Synonymized by Bücherl et al. 1971: 128.

Idiops petiti   – O. Pickard-Cambridge 1870: 107; 1896: 732, pl. 34 figs 9–12. — Mello-Leitão 1923: 48. — Bücherl et al. 1971: 121, fig. 5.

Idiops santaremius   – Petrunkevitch 1911: 73.

Diagnosis

The male of Idiops petiti   differs from that of other Neotropical species, except I. carajas   , by having the palpal tibia with spines concentrated in the basal half of the retrolateral depression ( Fig. 26C View Fig ), the tibial apophysis with a narrow apical branch and rectangular in shape ( Fig. 26G–H View Fig ) and by the presence of a lateral lamella that extends along the median portion of the embolus ( Fig. 26E–F View Fig ). Differs from I. carajas   by having the subapical portion of the embolus thin and straight ( Fig. 26E–F View Fig ) and the metatarsus of the leg I slightly curved and with a small prolateral projection on the apical half ( Figs 26I View Fig ). Females are distinguished from congeners, except I. carajas   , by having the spermathecae with a large sclerotized trapezoidal base and V-shaped ducts ( Fig. 26L View Fig ). Differs from I. carajas   by its large oval-shaped receptacula ( Fig. 26L View Fig ).

Type material

Holotype of Acanthodon petitii Guérin, 1838   BRAZIL – Pará • ♀; Santarém ; BMNH 1890.7.1.320 .  

Holotype of Acanthodon santaremia O. Pickard-Cambridge, 1896  

BRAZIL – Pará • juv.; Santarém ; Mar. 1896; O. P.-Cambridge leg.; BMNH 1896.12.13.66   .

Holotype of Idiops crulsi Mello-Leitão, 1930  

BRAZIL – Pará • ♀; Oriximná, Rio Cuminá ; G. Cruls leg.; MNRJ 0007 View Materials . Lost in the fire of 2018.  

The type specimen of Idiops petiti   was originally deposited in a dry collection and subsequently rehydrated and stored in alcohol. Although clearly an adult female, the specimen has lost many legs and the spermathecae, because the abdomen was stuffed with cotton. This prevented a more detailed description. The type specimen of I. santaremius   was examined and recognized as a juvenile of I. petiti   .

Other material examined

BRAZIL – Amazonas • 2 ♂♂; Manaus, Fazenda Esteio ; 2°23′3.00″ S, 59°51′15.00″ W; 6 Nov. 1985; B.C. Klein leg.; INPA 4590 View Materials to 4591 View Materials GoogleMaps   1 ♂; Benjamin Constant ; 4°22′58″ S, 70°1′51″ W; 2014; P.S. Pompeu leg.; IBSP 243961 View Materials GoogleMaps   1 ♂; Jutaí, near the Rio Jutaí ; 5º38′21.7″ S, 69º10′58.8″ W; 14–19 Mar. 2006; M.S. Hoogmoed leg.; MPEG 2579 View Materials GoogleMaps   . – Pará • 2 ♂♂; Belterra, Flona Tapajós , Km 83; 3°31′1″ S, 55°4′23″ W; 2010; J.L. Freitas leg.; IBSP 218829 View Materials , IBSP 218868 View Materials GoogleMaps   1 ♂; Almeirim, Jari ; 1°1′33.122″ S, 52°34′2.785″ W; MPEG 7588 View Materials GoogleMaps   1 ♂; Senador José Porfirio; Trilha do Censo , Margem Direita , Rio Xingu ; 2°35′27″ S, 51°57′14″ W; 25 Feb. 2001; MPEG 0113 View Materials GoogleMaps   1 ♂; Senador José Porfirio; Trilha do Acampamento , Margem Direita , Rio Xingu ; 25 Feb. 2001; MPEG 0116 View Materials   1 ♂; Jacareacanga, UHN de São Manoel ; 9°13′32″ S, 56°59′56″ W; 16 Feb. 2009; W.U. Prado leg.; UFMG 3205 View Materials GoogleMaps   1 ♂; Jacareacanga ; 21 Feb. 2009; W.U. Prado leg.; UFMG 3206 View Materials .   Rondônia • 1 ♀; Monte Negro, LC25 , Km 10; 10°14′49″ S, 63°24′16.8″ W; 19 Dec. 2013; P.H. Martins leg.; UFMG 24031 View Materials GoogleMaps   .

Description

Male (MPEG 0116)

HABITUS. See Fig. 26A View Fig .

MEASUREMENTS. TBL 17.2, CL 7.4, CW 6.7, LL 0.9, LW 1.4, SL 4, SW 3.6.

COLOR. Carapace and legs reddish brown, with yellowish coxae, brownish sternum; abdomen grey ( Fig. 26A–B View Fig )

PROSOMA. Carapace and ocular arrangement as shown in Fig. 26A View Fig . Eye tubercle: 0.7 long; 1.3 wide. AME-ALE distance 0.9. Eye diameters: AME 0.4, ALE 0.4, PME 0.2, PLE 0.4. Thoracic fovea procurved ( Fig. 26A View Fig ). Labium and sternum without cuspules ( Fig. 26B View Fig ). Basal segment of chelicerae with a prolateral row of 8 large teeth and 4 small retrolateral teeth, grouped in basal half, rastellum presenting 12–13 spines of same size.

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 26G View Fig . Leg I with double tibial apophysis. Apical branch twice the size of basal branch and with a conspicuous spine ( Fig. 26H–I View Fig ). Pseudoscopula: tarsus I–IV totally covered.

PALP. Elongated palpal bulb with slightly curved embolus and without torsion of subapical portion ( Fig. 26D–F View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 12 (3.8, 3.3, 3.21, 1.7), I = 22 (6.8, 3.5, 5.1, 4.8, 1.8), II = 18.9 (6, 3, 4.4, 3.8, 1.7), III = 17 (4.7, 2.9, 3, 4.3, 2.1), IV = 24.2 (6.9, 3.6, 5.9, 5.1, 2.7).

SPINATION. Palp: Ti r19, Ta d0-0-4. Leg I: Fe d1-2-1, Pa v0-1-5, Ti v10-15-16, p0-1-0, Mt v6-8-14, p0-0-5, r0-0-4, Ta p3-4-4, r5-6-6. Leg II: Fe d1-2-1, Pa p0-0-2, Ti v5-7-12, p2-2-9, r1-2-4, Mt v6-6-7, p3-5-10, r3-3-4, Ta p4-4-4, r6-6-7. Leg III: Fe d1-2-1, Ti p2-3-6, Mt r6-3-8, Ta p5-8-8, r2-4-7. Leg IV: Fe d1-2-1, Ti v1-2-3, r0-1-2, Mt v1-3-3, p1-2-5, r0-3-5, Ta p5-5-8, r5-5-8.

Female (UFMG 24031)

HABITUS. See Fig. 26J View Fig .

MEASUREMENTS. TBL 13, CL 5.8, CW 4.9, LL 0.8, LW 2, SL 3.5, SW 3.5.

COLOR. Carapace and legs brown, light brown sternum ( Fig. 22J–K View Fig ). Abdomen grey.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 26J View Fig . Eye tubercle: 0.6 long; 1 wide. AME-ALE distance 0.8. Eye diameters: AME 0.2, ALE 0.3, PME 0.2, PLE 0.4. Thoracic fovea procurved (Fig. J). Labium with 3 cuspules ( Fig. 26K View Fig ). Maxilla with 30 cuspules, distributed throughout anterior ventral half ( Fig. 26K View Fig ). Basal segment of chelicerae with a prolateral row of 7 large teeth and 4 small retrolateral teeth, grouped in basal half. Rastellum well developed, presenting 14–16 robust spines ( Fig. 26K View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 9.6 (3, 2, 2.2, 2.4), I = 10.2 (2.8, 2.2, 2.3, 1.7, 1.2), II = 10.2 (3.3, 2.2, 2, 1.3, 1.4), III = 11.3 (3, 2.3, 2, 2.3, 1.7), IV = 15.2 (4, 3, 3.2, 2.9, 2.1).

SPINATION. Palp: Ti p5-6-9, r6-8-12, Ta p6-7-8, r8-8-9. Leg I: Pa v0-0-2, Ti v1-2-1, p4-6-9, r4-6-11, Mt v2-1-1, p8-6-8, r10-3-4, Ta v0-0-1, p3-4-4, r4-3-2. Leg II: Ti v1-1-1, p3-7-7, r0-1-2, Mt v1-1-1, p7-5-4, r1-2-2, Ta v0-1-1, p4-4-3, r2-2-1. Leg III: Fe d0-0-1, Pa d0-0-1, p4-5-8, r0-0-1, Ti v0-1-2, p3-4-5, r0-1- 4, Mt v2-1-2, p2-3-2, r2-2-1, Ta v1-2-3, p0-0-3. Leg IV: Fe d0-0-1, Pa p12-4-2, Ti v1-1-2, Mt v2-3-5, p0-1-2, Ta v1-2-3, p0-3-6.

SPERMATHECAE. Ducts with weakly sclerotized basal half and thickened and sclerotized apical half; asymmetric receptacula, with expansion of medial half ( Fig. 26L View Fig ).

Distribution

Brazil. Widely distributed in the Amazon region, with records for the North region (Amazonas, Pará and Rondônia) ( Fig. 3B View Fig ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Idiops

Loc

Idiops petiti ( Guérin, 1838 )

Fonseca-Ferreira, Rafael, Guadanucci, José Paulo Leite, Yamamoto, Flávio Uemori & Brescovit, Antonio Domingos 2021
2021
Loc

Idiops crulsi Mello-Leitão, 1930: 55

Bucherl W. & Timotheo da Costa A. & Lucas S. 1971: 128
1971
Loc

Idiops santaremius

Petrunkevitch A. 1911: 73
1911
Loc

Acanthodon santaremia O. Pickard-Cambridge, 1896: 733

Pickard-Cambridge F. O. 1896: 733
1896
Loc

Idiops petiti

Bucherl W. & Timotheo da Costa A. & Lucas S. 1971: 121
Mello-Leitao C. F. 1923: 48
Pickard-Cambridge F. O. 1896: 732
Pickard-Cambridge O. 1870: 107
1870
Loc

Acanthodon petitii Guérin, 1838: 163

Guerin F. E. 1838: 163
1838