Protectoribates, Behan-Pelletier, 2017
publication ID |
https://doi.org/ 10.11646/zootaxa.4337.2.1 |
publication LSID |
lsid:zoobank.org:pub:A712D90D-FCD1-49C9-928F-21C95814815B |
DOI |
https://doi.org/10.5281/zenodo.5664399 |
persistent identifier |
https://treatment.plazi.org/id/9D02C578-FF9C-FFA7-FF12-CB4FFAC8FC8D |
treatment provided by |
Plazi |
scientific name |
Protectoribates |
status |
gen. nov. |
Protectoribates View in CoL gen. nov.
Figs. 1–7 View FIGURE 1 View FIGURES 2 – 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7
Type species: Protectoribates occidentalis sp. nov.
Diagnosis. Adult. With character states of Tegoribatidae ( Grandjean (1953, 1954), Woolley (1965) Fredes & Martínez (2016), and see below). Species comprising this genus are unique among poronotic Brachypylina ( Grandjean 1954) by having the following combination of character states. Rostrum with medial keel extending posteriorly; rostrum rounded anteriorly, without medial incision. Lamella long, fused, with V-shaped indentation anteriorly, covering all of prodorsum in dorsal aspect, without longitudinal line medially. Tutorium narrow lamelliform, cusp triangular. Genal tooth well-developed, pointed distally, with ridge along length. Bothridium with lateral and medial scales. Porose areas Ad and Am present, Al absent, Ah expressed as deep, round saccule. Dorsophragmata medially separated. Octotaxic system as 4 pairs of porose areas. Notogaster with non-overlapping posterior tectum. Pteromorph well-developed, without hinge; lenticulus absent; hexagonal pattern absent anteriorly on notogaster. Notogaster with 10 pairs of setae; setae not apobasic. Epimere I without necklace of tubercles. Epimeral setation 3-1-3-3. Custodium broadly rounded distally, or not. Sejugal apodeme and apodeme 3 welldeveloped. Genital setation 6 pairs, with 3 setae along anterior margin of each plate. Band of darkened integument posterior to genital plates. Postanal porose area absent. Subcapitulum diarthric, without tectum on mentum. Axillary saccule present. Legs monodactylous. Tibia II with large, dentate carina anterodorsally. Tibia IV with solenidion. Femur I without bend at level of seta d.
Juvenile instars Apheredermous; line of dehiscense incomplete; integument plicate, without hysterosomal macrosclerites or excentrosclerites, cerotegument as tightly packed platelets, 1 in diameter, covering all of body and leg segments. Prodorsal porose region present. Gastronotal setation unideficient; nymphs with 15 pairs of setae (f1 absent). Gastronotal setae of c, d, l and p series monomorphic, short, without barbs, acuminate ( Fig. 6 View FIGURE 6 ). Rostral, lamellar, and interlamellar setae subequal to gastronotal setae.
Description. Adult. Integument. Cerotegument present laterally on podosoma, finely and densely granulate ( Fig. 5E View FIGURE 5 ). Integument microtuberculate throughout; U-shaped depression extending from coxisternal region to posterior of anal plates ( Fig. 5B View FIGURE 5 ).
Prodorsum. Rostrum with smooth margin, without medial incision ( Fig. 5C View FIGURE 5 ); broadly rounded keel extending from margin posteriorly to underneath lamella ( Figs. 5C, D View FIGURE 5 ). Rostral seta heavily barbed laterally, directed anteromedially ( Fig. 3 View FIGURES 2 – 3 ). Lamella long, pair fused, covering all of prodorsum in dorsal aspect ( Figs. 1 View FIGURE 1 , 5A View FIGURE 5 ), without longitudinal line medially; nerve canal for seta le evident ( Fig. 7A View FIGURE 7 ). Seta le arising anterodorsally on lamella. Fused lamella with short, V-shaped indentation anteriorly; concave posterolaterally, accommodating bothridium ( Figs. 1 View FIGURE 1 , 7A View FIGURE 7 , and insert). Translamella absent. Exobothridial seta present (alveolus only indicated on Fig. 3 View FIGURES 2 – 3 ). Bothridial wall expanded medially and laterally, with scales, without lateral indentation ( Fig. 7A View FIGURE 7 , insert). Porose area Ad present. Dorsophragmata separate ( Fig. 1 View FIGURE 1 ).
Notogaster. Longer than wide; with immovable pteromorphs having smooth margins, without dens anteroventrally ( Fig. 5B View FIGURE 5 ). Anterior margin straight, transverse, without ridges in region lateral to bothridium ( Figs 1 View FIGURE 1 , 5A View FIGURE 5 ). Without subsurface anteromedial hexagonal pattern. Octotaxic system expressed as 4 pairs of porose areas ( Fig. 1 View FIGURE 1 ); without sexual dimorphism. With 10 pairs of short setae; distance h1-h1 wider than distance p1-p1.
Lateral Region of Podosoma. Genal tooth, pointed triangular, with longitudinal ridge ( Figs. 3 View FIGURES 2 – 3 , 5E View FIGURE 5 ). Tutorium narrow, lamelliform, lying parallel to dorsal contour of prodorsum in lateral aspect, seta ro inserted at base of tutorial cusp ( Figs. 3 View FIGURES 2 – 3 , 5D View FIGURE 5 ). Pedotectum I convex dorsally, without ventral depression ( Fig. 3 View FIGURES 2 – 3 ). Pedotectum II present, without tubercle close to body wall. Custodium present, with long, free distal region, broadly rounded or not ( Figs. 3 View FIGURES 2 – 3 , 7B View FIGURE 7 ). Discidium strongly curved lamina ( Figs. 3 View FIGURES 2 – 3 , 7B View FIGURE 7 ). Porose area Al absent. Humerosejugal porose organs Am and Ah present, Am porose area, Ah saccule ( Figs. 7C, D View FIGURE 7 ).
Ventral. Epimere I without anterior necklace of small tubercles. Epimeral setal formula 3-1-3-3. Genital plates with 6 setae, 3 on anterior margin; 1 pair aggenital setae; 3 pairs adanal setae and 2 pairs anal setae ( Fig. 2 View FIGURES 2 – 3 ). Lyrifissure iad at anterolateral edge of anal plate. Postanal porose area absent. Band of darker integument extending transversely between genital and anal plates ( Fig. 2 View FIGURES 2 – 3 ).
Gnathosoma . Chelicera chelate-dentate. Mentum without tectum, without recurved ridge distally ( Fig. 5E View FIGURE 5 ). Palp setal formula 0-2-1-3-9(1); eupathidium acm shorter than solenidion, forming double horn with solenidion along length, but partially separated basally (as in Tectoribates Behan-Pelletier & Walter 2013 , their Fig. 7E View FIGURE 7 ).
Legs. Monodactylous ( Figs. 4A–C View FIGURE 4 ). Leg setal formula I–IV, solenidia in parentheses: I: 1-5-3(1)-4(2)-20(2); II: 1-5-3(1)-4(1)-15(2); III: 2-2-1(1)-3(1)- 15; IV: 1-2-2-3(1)-12. Genua I and II without tooth ventrally ( Figs. 4A, B View FIGURE 4 ). Porose areas on femora I to IV and trochanters III and IV. Femur I without bend medially at level of seta d. Tibia II with anterodorsal dentate carina ( Figs. 4B View FIGURE 4 , 5D View FIGURE 5 , 7E View FIGURE 7 ). Seta s on tarsus I eupathidial, positioned distal to setae (a).
Solenidia on tarsus II shorter than setae on segment ( Fig. 7E View FIGURE 7 ); ω1 not most proximal setiform structure on segment. Femur III with seta l’ absent (2 setae); seta v' of genua I and II present. On genua and tibiae I and II setae l” subequal in shape to l’, setiform ( Figs. 4A, B View FIGURE 4 ). Seta pv” on tarsus II, comb-like ( Fig. 7E View FIGURE 7 ). Anterodorsal knobs or spines absent from tibia I.
Etymology. The derivation of Protectoribates is from the Latin ‘protector’, meaning "protector", and ‘oribates’ from Greek, a common ending for generic names in Tegoribatidae . It refers to a possible function of the dentate carina on tibia II.
Remarks. Adults of Protectoribates are distinguished from those of all other genera by having the combination of: dentate carina on tibia II, gnathosoma without tectum on mentum, pteromorphs without hinge, Ah developed as saccule; band of darkened integument posterior to genital plates, postanal porose area absent ( Table 4). Among these traits, the dentate carina on tibia II and the form of humerosejugal organ Ah are considered apomorphic.
Immatures of Protectoribates are similar to those of Tectoribates ( T. alcicampestris Behan-Pelletier & Walter, 2013 and T. borealis Behan-Pelletier & Walter, 2013 ) in being plicate, apheredermous with monomorphic hysterosomal setae of series c, d, l, and h. Hysterosomal setae of immature Hypozetes laysanensis Aoki, 1964 are also monomorphic, but larval seta dp are twice the length of other hysterosomal setae and are borne on distinct tubercles ( Behan-Pelletier 2001). Similarly, in larva and nymphs of Plakoribates multicuspidus Popp, 1960 hysterosomal setae are monomorphic in shape, but seta dp are twice the length of other hysterosomal setae and are also borne on distinct tubercles ( Shereef 1977). In contrast, known immatures of Tegoribates are plicate and eupheredermous, integridorsal (retain centrodorsal setae) and hysterosomal setae are dimorphic (see below).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
SubOrder |
Oribatida |
Family |
Protectoribates
Behan-Pelletier, Valerie M. 2017 |
Tectoribates
Behan-Pelletier & Walter 2013 |