Cryptocellus iaci Tourinho, Lo Man-Hung & Bonaldo, 2010

Salvatierra, Lidianne, Tourinho, Ana Lúcia & Giribet, Gonzalo, 2013, Description of the male, larva and nymphal stages of Cryptocellus iaci (Arachnida, Ricinulei), with an overview of tarsal sensilla and other integumental structures, Zootaxa 3709 (2), pp. 149-161 : 151-156

publication ID

https://doi.org/ 10.11646/zootaxa.3709.2.3

publication LSID

lsid:zoobank.org:pub:18F7293F-E21A-4386-8DBC-5807A0A42BEF

DOI

https://doi.org/10.5281/zenodo.6155662

persistent identifier

https://treatment.plazi.org/id/8E0BD708-BC16-F71B-1BCB-F9C27E0EB525

treatment provided by

Plazi

scientific name

Cryptocellus iaci Tourinho, Lo Man-Hung & Bonaldo, 2010
status

 

Cryptocellus iaci Tourinho, Lo Man-Hung & Bonaldo, 2010 View in CoL

( Figs. 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 )

Type material examined: female holotype ( INPA 086), community of Caicubi (-1.0089º, -62.1196º), municipality of Caracaraí, state of Roraima, Brazil, visual nocturnal search, 25.x.2008, A.L. Tourinho leg.

New material examined: 1 larva ( INPA 087), 1 protonymph ( INPA 088), 1 deutonymph ( INPA 089), 1 tritonymph ( INPA 090) and 2 males ( INPA 0 91, 092) from “Bacaba” (-0.97799º, -62.10292º), community of Caicubi, municipality of Caracaraí, state of Roraima ( Brazil), leg. A.L. Tourinho, 25.v.2012, leaf litter sifting; 3 protonymphs, 3 tritonymphs (one leg used for DNA extraction) ( MCZ DNA 107039; IZ- 130037) from trail leading East of Caicubi (G. Giribet’s loc. 984: -1.02897º, -62.08722º), Rio Jufari, municipality of Caracaraí, Arquipélago de Mariuí e Baixo Rio Branco, Médio Rio Negro, Roraima ( Brazil), leg. L.R. Benavides, G. Giribet, G. Hormiga, 26.v.2012, leaf litter sifting; 1 male (on SEM stub), 1 female, 2 protonymphs, 1 deutonymph, 5 tritonymphs ( MCZ DNA 107040; IZ- 130038) from “Barreira Branca” (G. Giribet’s loc. 987: -1.01113º, -62.11409º), same locality and collection method, leg. O. Ferreira da Silva, L.R. Benavides, G. Giribet, G. Hormiga, W. Porto, A. Tourinho, 26.v.2012; 2 protonymphs ( MCZ IZ- 127855) from “Bacaba” (G. Giribet’s loc. 989: -0.97799º, -62.10292º), same locality and collection method, leg. L.R. Benavides, G. Giribet, G. Hormiga, 27.v.2012; 1 protonymph ( MCZ IZ- 127856), 1 male ( MCZ DNA 107041; IZ- 130039) from “Pupunha” (G. Giribet’s loc. 991: -0.98905º, -62.09831º), same locality and collection method, leg. G. Giribet, O. Ferreira da Silva, 28.v.2012; 1 protonymph, 2 females ( MCZ DNA 107042; IZ- 130040) from trail leading East of Caicubi (G. Giribet’s loc. 993: -1.02868º, -62.08985º), same locality and collection method, leg. L.R. Benavides, J. Ballesteros, G. Giribet, G. Hormiga, R. Indicatti, W. Porto, C. Rheims, 29.v.2012; 1 tritonymph ( MCZ IZ- 127857) [with a teratological right leg II: with an undivided tarsus (instead of 5 tarsomeres), but with a functional claw] from “Tucano” (G. Giribet’s loc. 997: -1.01460º, - 62.10589º), same locality, leg. L.R. Benavides, J. Ballesteros, T. da Silva, G. Giribet, G. Hormiga, 31.V.2012, on a tree trunk during night collecting by boat in inundated forest.

Revised diagnosis. Cryptocellus iaci can be readily recognized by the following combination of characters: carapace of male with tubercles concentrated in the grooves, forming five groups ( Fig. 6 View FIGURE 6 ), one group positioned in lateral carapacal grooves, a group following the median line, and three groups on posterior margin of carapace ( Figs. 5 View FIGURE 5 a, 6, 7c), female carapace virtually smooth, thus differing from those of C. abaporu , C. becki , C. foedus and C. simonis , which are tuberculate. At least two distinct tarsal pits lined by microtrichia present on male pedipalpal tibia ( Figs. 4 View FIGURE 4 c, d), one dorsal and one lateral; females with proximal apophysis present dorsally on femur of leg I, blunt and as long as wide, apophysis present on leg II in males and females; proximal apophysis similar in size to that of C. abaporu , but not rounded as in the latter species (see Bonaldo & Pinto-da-Rocha 2003: fig. 14). The male resembles those of C. whitticki Platnick & Shadab 1977 and C. icamiabas in having a large concavity in the distal teleotarsus II of tarsus III, a large inner apophysis, and a large and rounded apophysis on trochanter IV. The female resembles that of C. becki (see Platnick & Shadab 1977: fig. 38) in having few tubercles on the cucullus, concentrated in the distal region ( Figs. 5 View FIGURE 5 d, 7b), but differs in having the opisthosoma with two ventral pairs of shallow lateral pits containing tubercles, the anterior pair smaller than the posterior one. Spermathecae similar to those of C. simonis , but with ducts more coiled.

Description of male. Total body length, excluding pygidium, 5.63; cucullus length 0.73, greatest width 1.22; prosomal length 2.40, maximum width 1.97, between legs II and III; opisthosomal length 3.23, maximum width 2.42, near middle of tergite XI; legs I 0.61/ 0.56/ 1.64/ 0.47/ 0.96/ 1.06/ 0.64 (total: 5.9); leg II 1.16/ 0.44/ 1.85/ 0.77/ 1.69/ 1.81/ 1.72 (total: 9.44); leg III 1.11/ 0.31/ 0.69/ 1.39/ 0.68/ 0.91/ 1.15/ 1.70 (total: 7.9); leg IV 0.97/ 0.54/ 0.43/ 1.60/ 0.55/ 0.95/ 0.82/ 1.14 (total: 7.0).

General body color dark reddish-brown or black ( Figs. 2 View FIGURE 2 , 3 View FIGURE 3 , 4 View FIGURE 4 ), prosomal venter lighter than dorsum, arthrodial membranes orange; cucullus dark red, darker at anterior margin and towards the middle. Type-11 tubercles present on DT I–IV, microtrichia present on DT I–IV ( Figs. 3 View FIGURE 3 a, g) and covering all body ( Figs. 5 View FIGURE 5 a, c, d). Cucullus with tubercles distributed as in Figs. 5 View FIGURE 5 d and 7b. Opisthosomal tubercles mostly present on median tergites, sometimes absent on lateral tergites, tubercles concentrated in lateral concavity of median tergites and at their margins; intersegmental arthrodial membranes without tubercles ( Fig. 7 View FIGURE 7 e). Legs densely covered with tubercles dorsally. Iridescent tubercles, showing shades of purple and blue, only present on opisthosomal venter. Surface of body entirely covered by two types of white setae, short and curved or long and straight ( Figs. 5 View FIGURE 5 a–c). Prosoma longer than wide ( Fig. 5 View FIGURE 5 a). Prosoma and opisthosoma covered with both long and short setae. Opisthosoma with high concentration of short, curved setae, appendages with short, curved setae more numerous than long, straight ones ( Fig. 5 View FIGURE 5 c). Tergal tubercles concentrated on anterior lateral and central regions. One pair of lateral eye fields with translucent cuticle. Sternal region with coxae I not meeting tritosternum; left and right coxae II–IV meeting along midline; coxae IV free, not fused to coxae III ( Figs. 5 View FIGURE 5 b, 7f). Pygidium with distal dorsal notch on basal segment; lacking ventral notch ( Figs. 5 View FIGURE 5 c, 7e). Chelicerae small (880 µm long), with 4 or 5 large teeth on fixed finger and 7 large teeth on movable finger, covered by a brush of long plumose setae ( Fig. 4 View FIGURE 4 a). Pedipalpi orange, without tubercles ( Figs. 4 View FIGURE 4 b, c); long slit organ present on tibia ( Fig. 4 View FIGURE 4 c); a dorsal and a lateral deep tarsal pit on tibia of pedipalpus ( Fig. 4 View FIGURE 4 d), chela with 6 conspicuous teeth on fixed finger and 7–8 small teeth on movable finger (tarsus) ( Fig. 4 View FIGURE 4 c). Pedipalpal setae uniform in shape ( Figs. 4 View FIGURE 4 b–c). Leg formula II>IV>III>I. Tarsal formula 1,5,4,5. Sensillum of type 1 present on DT I–IV, a pair on DT-III; sensillum of type 2B absent; sensilla of types 3, 8, 9A and 10A present on DT I–IV; sensillum of type 9C present on DT III, pedipalpi and cucullus.

Description of larva ( Figs. 9 View FIGURE 9 a, b). Carapace slightly longer than wide; cucullus and opisthosoma wider than long. Carapace and cucullus more densely covered with tubercles than adult. Body covered with fine translucent setae. Leg formula II>III>I. Tarsal formula 1,2,2. General body color (in 96% ethanol) pale yellow, opisthosoma yellowish-orange (dorsal and ventral view). Cucullus, legs, sternal region and pedipalpi pale yellow, tibia of pedipalpus light orange. Measurements (n = 1): total body length, excluding pygidium, 1.36; cucullus length 0.32, maximum width 0.41; prosomal length 0.71, maximum width 0.8, between legs II and III; opisthosomal length 0.61, maximum width 0.9, near anterior margin; leg I 0.29/ 0.14/ 0.30/ 0.16/ 0.23/ 0.31/ 0.13 (total: 1.56); leg II 0.38/ 0.19/ 0.48/ 0.25/ 0.31/ 0.40/ 0.37 (total: 2.38); leg III 0.31/ 0.16/ 0.15/ 0.16/ 0.34/ 0.17/ 0.25/ 0.16 (total: 1.7).

Description of protonymph ( Figs. 9 View FIGURE 9 c, d). Carapace, cucullus and opisthosoma wider than long. Carapace and cucullus more densely covered with tubercles than larva; body covered with fine translucent setae, as in larva. Leg formula II>III>IV>I. Tarsal formula 1,4,3,2. General body color (in 96% ethanol) pale yellow, opisthosoma yellowish-orange (dorsal and ventral view). Cucullus, legs, sternal region and pedipalpi yellow; tibia of pedipalpus darker. Measurements (n = 1): total body length, excluding pygidium, 2.29; cucullus length 0.42, maximum width 0.54; prosomal length 0.89, maximum width 1.04, between legs II and III; opisthosomal length 1.42, maximum width 1.60, towards middle of tergite XI; leg I 0.40/ 0.16/ 0.43 /0.29/0.36/0.38 /0.21 (total: 2.2); leg II 0.54/ 0.25/ 0.70/ 0.35/ 0.42/ 0.65/ 0.64 (total: 3.6); leg III 0.46/ 0.29/ 0.25/ 0.49/ 0.28/ 0.35/ 0.32/ 0.28 (total: 2.7); leg IV 0.38/ 0.24/ 0.22/ 0.39/ 0.22/ 0.35/ 0.37/ 0.23 (total: 2.4).

Description of deutonymph ( Figs. 9 View FIGURE 9 e, f). Carapace longer than wide; cucullus and opisthosoma wider than long. Carapace and cucullus densely covered with tubercles, body covered with fine translucent setae, as in the previous stages. Leg formula II>IV>III>I. Tarsal formula 1,5,4,4. General body color (in 96% ethanol) orange, arthrodial membranes of opisthosoma dark yellow (dorsal and ventral view). Cucullus and legs orange, sternal region dark yellow, pedipalpi pale yellow with distal segment orange. Measurements (n = 1): total body length, excluding pygidium, 3.35; cucullus length 0.59, greatest width 0.73; prosomal length 1.38, maximum width 1.27, between legs II and III; opisthosomal length 1.93; maximum width 2.02, towards the middle of tergite XI; leg I 0.61/ 0.36/ 0.59/ 0.44/ 0.37/ 0.46/ 0.22 (total: 3.1); leg II 0.73/ 0.37/ 1.03/ 0.54/ 0.98/ 0.95/ 0.86 (total: 5.5); leg III 0.67/ 0.27/ 0.33/ 0.66/ 0.47/ 0.50/ 0.47/ 0.47 (total: 3.8); leg IV 0.62/ 0.31/ 0.29/ 0.71/ 0.50/ 0.56/ 0.47/ 0.41 (total: 3.9).

Description of tritonymph ( Figs. 9 View FIGURE 9 g, h). Carapace longer than wide; cucullus and opisthosoma wider than long. Carapace and cucullus with fewer tubercles than previous nymphal stages. Leg formula II>IV>III>I. Tarsal formula 1,5,4,5. Body covered with fine translucent setae. Coloration as in deutonymph. Measurements (n = 1): total body length (excluding pygidium) 4.97; cucullus length 0.78, greatest width 0.93; prosomal length 1.74, maximum width 1.66, between legs II and III; opisthosomal length 3.17, maximum width 2.97, towards the middle of tergite XI; leg I 0.72/ 0.47/ 0.98/ 0.51/ 0.71/ 0.86/ 0.34 (total: 4.6); leg II 0.94/ 0.53/ 1.32/ 0.87/ 1.12/ 1.47/ 1.36 (total: 7.6); leg III 0.78/ 0.37/ 0.51/ 0.90/ 0.61/ 0.56/ 0.46/ 0.82 (total: 5.0); leg IV 0.73/ 0.46/ 0.41/ 0.96/ 0.69/ 0.73/ 0.72/ 0.62 (total: 5.3).

Notes on biotope. See Tourinho et al. (2010) for details of the locality. All specimens were collected from leaf litter sifting, except for one specimen, which was collected on the trunk of a tree in an inundated forest and would not have been able to get to the soil without submerging in water.

Distribution. Known only from the type locality, in the state of Roraima, northern Brazil ( Fig. 1 View FIGURE 1 ).

INPA

Instituto Nacional de Pesquisas da Amazonia

DNA

Department of Natural Resources, Environment, The Arts and Sport

MCZ

Museum of Comparative Zoology

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