Tegoribates walteri, Behan-Pelletier, 2017

Behan-Pelletier, Valerie M., 2017, Tegoribatidae of North America, with proposal of Protectoribates gen. nov., and new species (Acari, Oribatida, Tegoribatidae), Zootaxa 4337 (2) : 182-187

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.5664409

persistent identifier

https://treatment.plazi.org/id/9D02C578-FF81-FF87-FF12-CE1DFA87FA41

treatment provided by

Plazi

scientific name

Tegoribates walteri
status

sp. nov.

Tegoribates walteri View in CoL sp. nov.

( Figs. 20 View FIGURE 20 , 21 View FIGURE 21 , 22A–D View FIGURE 22 , 23 View FIGURE 23 )

Material examined: Holotype: adult male, USA, California, Sonoma Co., Salt Point State Park , 38°567N 123°333W, Sea Cliff Trail , 6.iii.2009 (VBP and M. Behan) from litter under lupins; deposited in the CNC, type number 24350 . Paratypes: 2 females, 10 males with same data as holotype. Paratypes deposited in the CNC, USNM, and RNC.

Diagnosis. Total length 350–400. Lamella 104 long, medially with V-shaped indentation, about 3 long. Lamellar seta arising anteriorly on fused lamella, 10–17 long. Interlamellar setae 7–11. Bothridial seta fusiform, 77–90 long. Pedotectum I pointed distally. Muscle sigillae strongly developed on notogaster (clearly visible with incident illumination). Octotaxic system as 4 pairs porose areas, Aa about 11 in diameter. Notogastral setae smooth, 6–8, setae subequal in length; lm posteromedial of Aa and lp dorsocentrally positioned, medial of A1. Tutorium 72– 80 long, of which cusp 17–21. Custodium pointed distally, 3–5 long. Tridactylous.

Description. Adults. Dimensions: Total length: females (n = 2) 370, 400; males (n = 10) 359 (range 350–374). Notogastral width: females (n = 1) 240; males (n = 10) 230 (range 221–240).

Integument: Smooth; longitudinal shallow grooves ventrally extending from level of custodium to posterior of anal plate ( Fig. 21B View FIGURE 21 ). Pteromorph, pedotectum I, gnathosoma , epimeres microtuberculate ( Figs. 21 C–E View FIGURE 21 ).

Prodorsum: Seta ro about 25 long, strongly barbed along length, acuminate, curved anteromedially; mutual distance about 50 ( Fig. 21C View FIGURE 21 ). Lamella about 104 long, medially with V-shaped indentation; about 3 long. Lamellar seta arising anteriorly on fused lamella, 10–17 long; mutual distance 26–28 ( Figs. 20 View FIGURE 20 , 21C View FIGURE 21 ). Seta in 7–11 long, thin, smooth, acuminate; mutual distance 53–56 ( Figs. 20 View FIGURE 20 , 22A View FIGURE 22 ). Bothridial seta fusiform, 77–90 long. Seta ex not evident, alveolus present. Dorsophragmata fused, elongated, length about 22 ( Fig. 22A View FIGURE 22 ).

Lateral region of podosoma: Taenidium extending from rostrum to acetabulum I ( Fig. 21E View FIGURE 21 ). Pedotectum I pointed distally. Tutorium narrow tectum, about 74 long, with tooth distally, about 3 long, covering insertion of seta ro. Custodium tapered to point distally 3–5 long ( Fig. 22C View FIGURE 22 ).

Notogaster: Slightly longer than wide: 1.2:1; anterior margin straight. Lenticulus absent. Muscle sigillae clearly evident on anterior of notogaster with incident or transmitted illumination ( Fig. 22D View FIGURE 22 ). Octotaxic system expressed as porose areas, Aa about 11 in diameter, A1–A3 about 9 at widest; porose area A3 variable, may be absent bilaterally (1 specimen) or unilaterally (1 specimen) ( Fig. 20 View FIGURE 20 ). Notogastral setae smooth, 6–8 long, setae subequal in length; lm posteromedial of Aa and lp dorsocentrally positioned, medial of A1; mutual distance of h1-h1 about 90, of p1-p1 about 59.

Ventral Region: Epimeral setae mostly about 7–18 long, thin, smooth, acuminate, with 1c slightly barbed. Aggenital, anal and adanal setae smooth; genital setae about 14, others about 9. Genital setae six pairs, g1-g3 about 14 long, posterior 3 pairs about 9 long. Lyrifissure iad at anterolateral edge of anal plate. Postanal porose area about 33 long and 4 wide.

Gnathosoma: Small axillary saccule present at base of palp, 4 x 2. Length of seta m>a>h.

Legs: Setation as for Tegoribates americanus ( Figs. 12A–C View FIGURE 12 , Table 3). Seta l” of genu II strongly spine-like ( Figs. 21A, C View FIGURE 21 ). Tridactylous.

Immatures. Dimensions: Mean length (based on slide mounted specimens): protonymph (n=1) 260; deutonymph (n = 1) 360. Length of prodorsal and hysterosomal setae given in Table 1.

Larva ( Fig. 23A View FIGURE 23 ). Only scalp available. Length scalp 159 (n =1). Setae c, da, dm, dp small, smooth, tapered; mutual distance da-da, dm-dm, dp-dp 12, 16 and 10, respectively.

Protonymph ( Fig. 23B View FIGURE 23 ). Integument: Sclerotized with light brown coloration. All of body, other than centrodorsal region of hysterosoma covered by layer of cerotegument as globules, about 1 in diameter.

Prodorsum: Porose region on aspis not evident. Seta ro finely barbed along length, tapered. Seta le, in and ex smooth, isodiametric; mutual distance of setae ro-ro, le-le and in-in about 19, 20 and 34, respectively. Bothridial seta setiform.

Gastronotic Region: Integument without sclerotization; centrodorsal region normally covered by larval scalp, smooth; integument slightly plicate laterally. Gastronotal setae of c, d, p series and la, lm, h2, h1 short, smooth, isodiametric; lp and h3 long, setiform, embedded in thick covering of cerotegument. Mutual distance of setae dada, dm-dm and dp-dp about 12, 21 and 9, respectively.

Ventral Region: Medial margin of epimeral plates weakly defined. Epimere I with narrow mentotectum overlapping medially. Epimeral, genital, aggenital, anal and adanal setae smooth, isodiametric, about 9 long. Porose integument surrounding opening of opisthonotal gland not evident.

Gnathosoma: Axillary saccule present. Palpal eupathidium acm attached to solenidion along distal threequarters of solenidial length.

Legs: Genua and tibiae I-IV with seta d subequal in length to companion solenidion; solenidion on genua I-III and tibiae II, III with slightly bulbous tip.

Deutonymph ( Figs. 23 C, D View FIGURE 23 ). As for protonymph, except for overall size. Dorsal of hysterosoma with few plicae. Length of combined larval and protonymphal scalps about 220. Mutual distance of ro-ro, le-le and in-in about 20, 17, and 42, respectively. Gastronotal setae c, d, l, p, and h1 short, isodiametric; setae h3 and h2 brush-like, broad, long; mutual distance of setae da-da, dm-dm and dp-dp about 12, 25 and 10, respectively.

Epimeral setae (protonymph and deutonymph): 3-1-2-1, 3-1-2-2. Genital, aggenital, anal and adanal setae (protonymph and deutonymph): 1-3, 1-1, 0-0, 0-2, respectively.

Leg setae and solenidia as for protonymph and deutonymph of Tegoribates americanus in Table 3.

Etymology. The specific epithet honours my colleague and friend Dr. David Evans Walter, who has contributed so significantly to acarology in North America and globally.

Remarks. Adults of Tegoribates walteri sp. nov., are clearly distinguished from those of other North American species of Tegoribates by having the octotaxic system in the form of porose areas; porose areas are also found in T. montana and T. natalensis , known from South Africa ( Engelbrecht 1986). The 2 South African species are monodactylous, whereas T. walteri sp. nov. is tridactylous.

Immatures of T. walteri sp. nov. and T. americanus are similar in the shape and length of setae c and d, but l and h series setae differ in shape and length ( Table 1). Comparisons with immatures of T. latirostris are limited, as only the illustrations of Tuxen (1943) are available. The larva he illustrated appears similar to that of T. americanus with long, thick setae h3 and h2.

Gut contents of immature and adult Tegoribates walteri sp. nov. include fungal hyphae and spores.

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

RNC

RNC

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

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