Armascirus bahiaensis Den Heyer

Heyer, Jacob Den & Castro, Tatiane Marie Martins Gomes De, 2012, New Neotropical cunaxine species (Acari: Prostigmata: Cunaxidae), Zootaxa 3265, pp. 22-42: 29-33

publication ID

http://doi.org/ 10.5281/zenodo.280740

persistent identifier

http://treatment.plazi.org/id/03D19D51-FF86-FFB2-6BD1-FD64FCDAFCF5

treatment provided by

Plazi

scientific name

Armascirus bahiaensis Den Heyer
status

sp. nov.

Armascirus bahiaensis Den Heyer  sp. nov.

( Figs 17–30View FIGURES 17 – 21View FIGURES 22 – 25View FIGURES 26 – 30)

Material examined: 1 female holotype and 1 male paratype from Musa coccinea, Ibirapitanga, Boa Esperança  , Bahia, Brasil, 17 -IV- 2007, A.R. Oliveira; 1 male paratype, Euterpa sp., (Follia basai), Recife, PE, Brasil, 06-I- 1999 M.G.C. Gondim jnr.

Description.

Female ( Figs. 17- 25View FIGURES 17 – 21View FIGURES 22 – 25). Dimensions. Idiosoma  : length 585; width 366; length hypognathum 293; width hypognathum 158; length palp 412 – 416; length chelicerae 243; length legs: I 485. – 487; II 458 – 474; III 474 – 477; IV 655 – 674; length sensillae vi 407 – 429, sce 485 – 501

Dorsum ( Fig. 17View FIGURES 17 – 21 a). Provided with four idiosomal shields: 1 propodosomal, 1 median and 2 lateral hysterosomal shields; all being reticulate ( Fig. 17View FIGURES 17 – 21 a). The median shield is provided with 1 pair of setae d 1 and bordered by setal pairs c 1, c 2 and e 1 and lateral shields; it is proportionally larger than in the female of Armascirus brasiliensis  sp. nov. The propodosomal sensillae are unequal in length. Setae h 1 are the longest dorsal setae. The integument is densely and finely striated.

Venter ( Fig. 17View FIGURES 17 – 21 b). This body region is typical for the genus except that the lateral coxal seta on coxae III are absent. Six hysterogastral, 1 pair each of propodogastral and paracoxal setae are present. No paragenital setae present. Integument striate and papillate. Each genital shield carries 4 g- setae.

Gnathosoma  ( Figs. 18–22View FIGURES 17 – 21View FIGURES 22 – 25)

Hypognathum ( Figs 22View FIGURES 22 – 25 a&b). Setation normal for the genus. The ventral surface is randomly and finely papillate ( Fig. 18View FIGURES 17 – 21). The stoma is situated between the cheliceral bases ( Fig. 19View FIGURES 17 – 21), giving rise to the paired podocephalic canals and a median trachea.

Palp ( Fig. 20View FIGURES 17 – 21) The chaetotaxy is: trochanter 0; basifemur 1 dorsal st-seta, telofemur 1 spine-like seta, 1 apophysis; genu 3 spine-like setae, 1 apophysis; tibiotarsus 1 proximal seta, 1 tubercle, 2 tiny st-setae, 1 distal solenidion and a monofid (single) terminal claw. The palp extends from the genu past the entomalae.

Chelicerae ( Fig. 21View FIGURES 17 – 21). Cheliceral segment I dorsally randomly papillate; segment II papillae form a reticulate pattern on proximal part. Cheliceral setae present.

Legs ( Figs. 23 & 24View FIGURES 22 – 25). Leg chaetotaxy: coxae I – IV 3 sts, 1 peg – 2 sts – 2 sts – 2 sts; trochanters I –IV 1 – 1 – 2 - 1 sts; basifemora I –IV 1 spine, 3 or 4 sts – 1 spine, 4 sts – 1 spine, 3 sts – 1 spine, 1 sts; telofemora I – IV 2 spine-like setae, 2 sts – 1 spine, 3 sts – 1 spine, 3 sts – 1 spine, 3 sts; genua I – V 1 asl, {1 sts, 1 asl}, 1 asl, 4 sts – 2 asl, 5 sts – 1 asl, 1 spine, 4 sts – 2 asl, 5 sts (of which 3 are spine-like); tibiae I –IV 1 short asl,{1 long asl, 1 sts}, 4 sts – 1 asl, 5 sts – {1 bsl, 1 sts}, 1 dorsal stout sts, 3 sts – 1 T, 4 sts; tarsi I – IV 3 asl, (1 sts, 1 fmls, 1 long asl}, 1 dtsl, 2 tsl, 3 lateral spine-like sts, 19 sts – 1 bsl, 1 dtsl, 1 tsl, 3 spine-like setae, 19 sts – 1 tsl, 17 sts – 21 or 22 sts

Male ( Figs 25–30View FIGURES 22 – 25View FIGURES 26 – 30). Dimensions. Idiosoma  : length 329 (327–331); width 214 (208–219); length hypognathum 121 (119–123); width hypognathum 94 (92–96); length palp 140 (131–150); length chelicera 115 (104–123); length legs: I 287 (281–300); II 267 (254–281); III 314 (308–320); IV 327 (316–339); length sensillae vi 175 (169–181), sce 231 (223–243).

Idiosoma  . The idiosoma  very closely resembles that of the male of Armascirus brasiliensis  sp. nov. The ventral idiosomal “shield”-like area carries 5 pairs of setae: 1 pair propodogastral sts, 1 pair paracoxal sts, 3 pairs of hysterosomal setae.

Gnathosoma  ( Figs. 24–26View FIGURES 22 – 25View FIGURES 26 – 30). All components heavily sclerotized.

Hypognathum ( Fig. 24View FIGURES 22 – 25 a & b). Bears the four ventral hg setae plus 2 pairs of adoral setae on the entomalae. Ventrally randomly papillate.

Palp ( Fig. 25View FIGURES 22 – 25 a & b) Two variants of palpi were observed in the males of this species ( Figs 25View FIGURES 22 – 25 a & b). The difference lies in the apophysis at the base of the palpal tibiotarsus. The palp in Fig. 25View FIGURES 22 – 25 a is fully stretched and the small apophysis can be observed; in Fig 25View FIGURES 22 – 25 b the palp is bent and this might render the small apophysis unobservable. The palps reach past the entomalae with the distal half of the genu plus tibiotarsus. The chaetotaxy of the palp is as follows: trochanter 0, basifemur 1 dorsal sts, telofemur 1 dorsal spine-like seta, genu 3 spine-like setae, tibiotarsus 1 small median apophysis, 1 moderately long ts, 1 median tubercle, 2 sts, 1 dorsoterminal solenidion and a terminal claw (bi- or mono-fid). The dorsal integument is randomly papillate.

Chelicerae ( Fig. 26View FIGURES 26 – 30). Typical for the genus.

Legs (figs. 27–30). As in all Armascirus  spp. the leg integument is dorsally provided with papillae forming a reticulate pattern. Leg chaetotaxy: coxae I – IV 3 sts, 1 peg – 2 sts – 2 sts – 2 sts; trochanters I – IV 1 – 1 – 2 – 1 sts; basifemora I – IV 5 sts – 5 sts – 3 sts – 0; telofemora I – IV 4 – 4 – 4 – 4 sts; genua I – IV {1 stout bsl, 1 asl, 1 sts}, 2 asl, 4 sts – 1 stout bsl, 1 asl, 5 sts – 1 stout bsl, 1 asl, 4 sts – 1 stout bsl, 5 sts; tibiae I – IV 1 stout bsl, {1 asl, 1 sts}, 4 sts – 1 asl, 5 sts – {1 bsl, 1 sts}, 4 sts – 1 T, 4 sts; tarsi I – IV {1 fmls, 1 stout bsl, 1 sts}, 3 asl, 1 dtsl, 2 tsl, 14 sts – {1 stout bsl, 1 sts}, 1 dtsl, 1 tsl, 13 sts – 1 tsl, 12 sts – 13 sts.