Passalozetes (Passalozetes) alumbrensis, Martínez & Herrero, 2006
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publication ID |
https://doi.org/ 10.11646/zootaxa.1160.1.5 |
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publication LSID |
lsid:zoobank.org:pub:12A9957F-59EB-49A9-97FF-FEB9C21AD4C4 |
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persistent identifier |
https://treatment.plazi.org/id/03D93B0E-2D62-FF87-FEE8-FE17FAB00559 |
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treatment provided by |
Felipe |
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scientific name |
Passalozetes (Passalozetes) alumbrensis |
| status |
sp. nov. |
Passalozetes (Passalozetes) alumbrensis View in CoL n. sp.
Adult
Size, sex, shape, colour: Length varies from 336 to 377 m, with an average of 353 m, and a width between 164 and 193 m, with 178 m in average, over 26 specimens measured, in cold lactic acid. Fourteen individuals were females and twelve males, indicating a sex ratio of 1:1. Differences of size between sex were not observed.
Oval, elongated body; lengthwidth ratio near 2:1. Dark brown in colour.
Integument and cerotegument: Integument with linear ridges, or three or fourbranched ridges on areas of prodorsum and notogaster ( Fig. 1A View FIGURE 1 , 2A View FIGURE 2 ); on ventral region ridges more connected than on dorsal surface ( Fig. 1B View FIGURE 1 ). On propodosomal and ventral plate borders ridges form a reticulated pattern. The soft junction skin between notogaster and prodorsum is smooth. Cerotegument completely covers body and legs, following sculpture of the integument. Cerotegument formed by columnar secretions of about 0.12 m in diameter and 0.36 m height, disposed in “rosettes” of 1 to 3 m in diameter ( Fig. 2C View FIGURE 2 ). Under light microscopy, major rosettes stand out as separated small spherules in areas between ridges ( Fig. 1A View FIGURE 1 ), even when the cerotegumentary layer is uninterrupted ( Fig. 2C View FIGURE 2 ). Cerotegument also covers setae, at least proximally. Over the lenticular surface there is a continuous smooth secretion layer ( Fig. 2B View FIGURE 2 ).
Gnathosoma, chelicerae, palps: Infracapitulum diarthric. Mentum reticulated, 45 m in length, genae and rutella 1/3 of mentum size. Chelicerae 75 m in length, movable digit (length= 20 m) with three teeth. Palp normal, tarsus minute (length= 13 m), palpatarsal solenidion close to aupathidium acm, but not strongly associated, both inserted distally.
Prodorsum: Two longitudinal, marginal costulae present, directed towards rostrum, extending 2/3 length of prodorsum; and weak, transverse ridge present, in front of the anterior limit of the notogaster ( Figs. 1A View FIGURE 1 , 2A View FIGURE 2 ). Interlamellar setae (in) minute (6 m), lamellar (le) and rostral (ro) setae medium sized (18 and 26 m respectively) and inserted on a same line, near each other. Setae ro inserted laterally. All prodorsal setae smooth. Bothridia with a low thickened border and a posterolateral projection ( Figs. 1A View FIGURE 1 , 2E View FIGURE 2 ). Sensilli filiform, flat in section, pointed and reclined backwards, with small barbules on their posterior edge. Exobothridial setae (ex) minute (9 m), inserted below and slightly lateral to the bothridia, lodged in a depression ( Fig. 2E View FIGURE 2 ).
Notogaster: long, length to width ratio = 1.4, protruding into prodorsum; dorsosejugal scissure not evident medially. At the humeral angles there are two small projections, as in the type species. Lenticulus present anteriorly with indistinct borders. Edge of lenticulus only evident by absence of integumental relief ( Figs. 1A View FIGURE 1 , 2A, B View FIGURE 2 ). Four pairs of small porose areas (5–8 m in diameter), three of those are visible in dorsal view ( Fig. 1A View FIGURE 1 ) and the fourth pair, A 3, in posterior view ( Fig. 2D View FIGURE 2 ). Porose areas covered with cerotegument; thus, their porosity is not evident ( Figs. 2D, F View FIGURE 2 ). Fissures im well marked ( Fig 1A View FIGURE 1 ); ip visible in posterior view ( Fig. 2D View FIGURE 2 ); other fissures not conspicuous. Ten pairs of small (10 m around), smooth setae. Rugosity of the integument makes their observation difficult.
Lateral region: pedotecta I and II well developed. Subhumeral porose areas (Ah) visible ventral to humeral projections, as illustrated in the type species ( Grandjean, 1932, Fig. 2 View FIGURE 2 ).
Ventral region: anal plates with longitudinal ridges; each with 2 setae (3 m in length). Genital plates have 5 pairs of setae (5–7 m length); anterior pair hard to see in some specimens under light microscopy, because inserted in the anterior border of the plate ( Fig. 2G View FIGURE 2 ). Genital plates smooth, with relief produced by strings of cerotegument. Lyrifissures iad are in preanal position ( Fig. 1B View FIGURE 1 ). Adanal setae (ad) are hardly visible, because of cuticular irregularities. Epimeral chaetotaxy is: 3122; epimeric setae around 8 m in length. Ovipositor retracted inside the body is 75 m in length, and extended it reaches 150 m ( Fig. 2H View FIGURE 2 ). Genital papillae subequal in size.
Legs: Porose areas present on femora (posterodorsally), tibiae (ventrodistally) and tarsi (ventral posterior side) ( Fig. 3 View FIGURE 3 ), also on trochanters III and IV (paraxial surface, near the insertion). Tibiae I with well developed apophysis. Genua show a pair of ventral spurs, characteristic of genus ( Figs. 2 I, J View FIGURE 2 ). Tarsi are heterotridactylous. Leg setae are serrated. Chaetotaxic formulae: I (142415 + famuli), II (142413), III (232313), IV (122 312). Solenidiotaxic formula: I (122), II (112), III (110), IV (010).
Material examined
Twentysix adults were observed. One holotype female and ten paratypes, stored in alcohol, are deposited in Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires, Argentina and 15 paratypes are deposited in the senior author’s collection .
Locality
Cerro Alumbre (32º 47´56” S, 69º 22´05”), Andes mountains , Frontal cordillera, Uspallata region in the province of Mendoza, Argentina, at a height of 3853 m.a.s.l., under a Stipa sp. shrub .
Etymology Name refers to sample locality. Remarks
The five pairs of genital setae in P. (P.) alumbrensis allows distinction of alumbrensis from other species in the subgenus except for P. (P.) prominens Balogh & Mahunka from Córdoba, Argentina, which is the only other species known from the Neotropical Region ( Balogh & Balogh, 1990). This species differs from alumbrensis in microsculpture on the notogaster and lenticular outline. The absence of a clear outline of the lenticulus is a trait that alumbrensis shares with P. inlenticulatus Mihelčič, 1959 , from western Mediterranean, but differs from it in body size (larger in alumbrensis ), sensillus shape and notogastral microsculpture ( inlenticulatus description was taken from PérezIñigo, 1993). Passalozetes (P.) alumbrensis resembles P. (P.) douglasensis Engelbrecht, 1974 , from South Africa, in sensillus shape and integumental ornamentation, but the lenticulus in douglasensis has a sharp outline and notogaster lacks humeral projections. The depression where exobothridial setae are lodged are not displayed in other Passalozetes species.
Discussion
Five pairs of genital setae, as present in P. (P.) alumbrensis , is a character state not included in the diagnosis of the Passalozetidae (where genital setae number is 4 pairs), even though this state was found in P. (P.) prominens Balogh & Mahunka 1968 , from Argentina. This character state implies the need for modification in the diagnosis of Passalozetidae , in order to include these taxa. Below, we present an extended diagnosis of this family, to include genital setal number, and other character states taken from literature:
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