Architis colombo, Santos, 2007

Santos, Adalberto J., 2007, A revision of the Neotropical nursery-web spider genus Architis (Araneae: Pisauridae), Zootaxa 1578 (1), pp. 1-40: 27-29

publication ID

http://doi.org/ 10.11646/zootaxa.1578.1.1

publication LSID

lsid:zoobank.org:pub:F1CA1CAB-1E51-4029-B0E8-DA9A5D204C66

persistent identifier

http://treatment.plazi.org/id/03B32614-484F-292C-6F98-541C99174464

treatment provided by

Felipe

scientific name

Architis colombo
status

sp. nov.

Architis colombo   sp. nov.

Figures 14A–F View FIGURES 14 , 17 View FIGURE 17

Type material. Holotype: male, Colombo , state of Paraná, Brazil, 25 o 16’S, 49 o 13’W, 24 November 1986, Equipe PROFAUPAR ( MCN 20361 View Materials ) GoogleMaps   . Paratypes: male and female, Poços de Caldas , state of Minas Gerais   ,

Brazil, 21 o 48’S, 46 o 34’W ( MCN 25131 View Materials ) GoogleMaps   . Paratype: male, Ouro Preto (Estação Ecológica de Tripuí, Apiário), state of Minas Gerais, Brazil, 20 o 22’S, 43º30’W, 2001, H. Guimarães ( IBSP 62893 View Materials ) GoogleMaps   . Paratypes: 2 females from Alto Caparaó (Parque Nacional do Caparaó), state of Minas Gerais, Brazil, 20º31’S, 41º54’W, 01–07 May 2002, Equipe Biota ( IBSP 62894 View Materials , 62895 View Materials ) GoogleMaps   .

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Males of Architis colombo   sp. nov. differ from those of other species of the genus by the anteriorly directed DTP and the large, ventrally projected prolateral excavation of the pedipalpal tibia ( Fig. 14C View FIGURES 14 ). The females resemble A. fritzmuelleri   sp. nov. in the anteriorly positioned copulatory openings and wide, strongly sclerotised CD. They can be distinguished by the small, posteriorly rounded median field, the anterior sclerotised hoods over the lateral lobes of the epigynum and by the absence of enlarged copulatory atria in the internal genitalia ( Figs 14E, F View FIGURES 14 ).

Description

Male ( based on holotype from Colombo , Brazil)  

Carapace brown, with a median and two lateral pale brown stripes from a posterior pale brown area to the ocular area ( Fig. 14A View FIGURES 14 ). Anterior eye row procurved, median eyes slightly larger than lateral eyes. Posterior eyes of similar size, approximately 1.5 times the diameter of anterior median eyes. Clypeus brown, chelicerae pale brown with a median dark spot anteriorly ( Fig. 14B View FIGURES 14 ). Labium and endites brown, sternum creamcoloured. Pedipalpi cream-coloured, with an apical brown ring on femur. Cymbium reddish-brown. Legs pale brown, with four dark rings on femora and scattered dark spots on other segments. Opisthosoma brown with a median and two lateral pale brown stripes from middle to anterior margin ( Fig. 14A View FIGURES 14 ). Opisthosoma sides brown with a median pale brown spot. Venter dark brown, pale at the margins and the epigastric plate. Spinnerets pale brown, darker on ectal sides. Total length 2.9; carapace 1.3 long, 1.4 wide. Tibia I length 1.8, II 1.7, III 1.0, IV 1.4. Opisthosoma 1.5 long, 1.1 wide. VTA rounded, projected dorsally to vRTA ( Fig. 14C View FIGURES 14 ); vRTA projected ventrally, with a small ventral knob ( Fig. 14C, D View FIGURES 14 ); dRTA small, shorter than vRTA ( Fig. 14D View FIGURES 14 ).

Female ( based on paratype, MCN 25131 View Materials , from Poços de Caldas , Brazil)  

Colour and eye configuration as male ( Figs 14A–B View FIGURES 14 ), except labium and endites cream-coloured and labium with a faint brown spot. Legs cream-coloured with scattered faint brown spots. Opisthosoma creamcoloured ventrally, spinnerets cream-coloured. Total length 3.1; carapace 1.4 long, 1.4 wide. Tibia I length 1.3, II 1.3, III 1.1, IV 1.2. Opisthosoma 1.5 long, 1.3 wide. Epigynum with median field restricted to anterior half ( Fig. 14E View FIGURES 14 ). CD not encapsulated, as wide as the elongated spermathecae ( Fig. 14F View FIGURES 14 ).

Variation. Males, total length 2.9–3.0. Females, total length 3.0–3.3, carapace width 1.3–1.5.

Natural history. The male from Ouro Preto (IBSP 62893) was collected in pitfall traps, suggesting it to be a ground dwelling species.

Distribution. Known only from type localities in southern and southeastern Brazil ( Fig. 17 View FIGURE 17 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pisauridae

Genus

Architis