Sadyattes annulatus ( Redtenbacher, 1908 )

Hennemann, Frank H., 2025, A review of Sadyattes Stål, 1875, with the descriptions of six new species from the Philippines (Phasmatodea: Platycraninae: Stephanacridini), Zootaxa 5610 (1), pp. 1-72 : 13-15

Sadyattes annulatus ( Redtenbacher, 1908)

( Figs. 2 , 22A )

Pharnacia annulata Redtenbacher, 1908: 451 . HT, ♂: 44068; Sampit, Borneo, Rupert; Tirachoidea annulata f.* Redtenbacher

[MNHU]. Pharnacia annulatus, Zompro, 2005: 254 . [Type data] Eucarcharus annulatus, Günther, 1935b: 138 . Phobaeticus annulatus, Brock, 1996: 28 .

Seow-Choen, 1998: 89.

Otte & Brock, 2005: 268. Baculolonga annulata, Bragg, 2001: 378 Sadyattes annulatus, Hennemann & Conle, 2008: 132 .

Seow-Choen, 2017: 151, figs. [Illustrations of HT]

Seow-Choen, 2019: 268.

Brock & Büscher, 2022: 559.

? Phobaeticus mjoebergi, Seow-Choen, 2016: 274 , fig. 816 (♀).

Further material:

1 ♂: Borneo, W-Kalimantan, Prov. Kalimantan Barat, Mount Bawang , 00°53,5’N 109°22,2’O, ca. 250 m, local collector II-IX.2009 [ FH, No. 1390-1] .

Differentiation. The ♂ of this Bornean species (the only sex known) is morphologically and chromatically very similar to that of incertus comb. nov., a species found in Peninsular Malaysia, islands in the Strait of Malacca and on the Andamans, with which it shares the long alae that reach as far back as to abdominal segment V. It can however be separated by the somewhat more globose head ( Fig. 2B ), which is less narrowed posteriorly and has the posterior margin less angulated if seen in lateral aspect, less pronounced medio-longitudinal carina of the mesosternum, shorter and rather gradually tapering vomer ( Fig 2G ; almost reaching to epiproct and with a slight widening preapically in incertus ), generally being more colourful but with the meso- and metafemora almost uniformly green with the exception of a black apex ( Fig. 2D ; with a faint yellowish pre-apical transverse band in incertus ).

Remarks. This species is likely to be the opposite sex of S. mjoebergi (Günther, 1935) , which is here removed from the genus Phobaeticus Brunner v. Wattenwyl, 1907 and transferred to Sadyattes (comb. nov.). However, specimens of both sexes from the same locality or from captive breeding need to become available for examination to prove or disprove this assumption. Hennemann & Conle (2008: 132) removed annulatus from the genus Pharnacia Stål, 1877 and placed it in Sadyattes . Seow-Choen (2017) provided detailed figures of the holotype ♂ in the collection of MNHU. Female and egg unknown. The ♀ from Bako National Park-NW-Sarawak illustrated by Seow-Choen (2016: 274, Fig. 618) as Phobaeticus mjoebergi is misidentified and undoubtedly a species of Sadyattes ( Fig. 22A ). Judging from the fairly large size (body length including subgenital plate 206.0 mm, without subgenital plate 178.0 mm) it is not unlikely to be the opposite sex of annulatus . Phobaeticus mjoebergi (Günther, 1935) keys out as a member of the tribe Pharnaciini (subfamily Clitumninae ) because Günther (1935c: 11) explicitly mentions a praeopercular organ on abdominal sternum VII that consists of two peg-like appendages, and also the strongly serrated “kräftig gesägt” ( Günther, 1935c: 10) anterodorsal carina of the profemora and unarmed medioventral carinae of the meso- and metafemora, as well as a median segment that is about three-quarters the length of the metanotum affiliate mjoebergi with the genus Phobaeticus Brunner v. Wattenwyl, 1907 or at least the tribe Pharnaciini respectively. Unfortunately, the holotype from Mount Tibang, Kalimantan in the collection of NHRS could not be examined for the present study.

The unique holotype is strongly discoloured due to former preservation in ethanol, but the ♂ in the author’s collection allows a description of the natural colouration of this pretty insect. Therefore, illustrations and a description of the colouration are here provided as follows ( Fig. 2 ): General colour dark green with the head, prothorax and three basal abdominal segments buff; the lateral areas of pronotum dark brown and the meso- and metapleurae dark yellowish. Abdominal terga IV–VII with a washed transverse posterior band and a black posterolateral marking and yellowish anterolaterally; sterna II-VII green with the posterior portion yellow and with a small black marking posterolaterally. The terminal three terga mostly dark yellow; VII and VIII each with a cream-colored median marking laterally and with a small black marking antero- and posterolaterally ( Figs. 2E–F ). Sternum VII with a black posterior transverse band ( Fig. 2G ). Tegmina and costal region of alae light cream-coloured with a yellowish stripe along anterior margin and a broad black medio-longitudinal streak ( Fig. 2C ). Meso- and metafemora dark green with the apex black ( Fig. 2D ); the profemora black with irregular orange mottling that form transverse bands in apical half. Tibiae black with three orange transverse annulae. All teeth of limbs black. Basitarsi black with basal half orange. Antennae black. Measurements in table 1 below.

Distribution: Borneo. Central Kalimantan (Kalimantan Tengah, East Kotawaringin Regency, Sampit [MNHU – type locality]; West Kalimantan (Kalimantan Barat, Mount Bawang, ca. 250 m [FH]).

Figures

FIGURE 2. Sadyattes annulatus (Redtenbacher, 1906) ♂ from Borneo, Kalimantan Barat, Mount Bawang [FH 1390-1]: A. Habitus, dorsal view; B. Head and prothorax, dorsolateral view; C. ♀ Detail of tegmina and alar bases, dorsal view; D. Kneeregion of left midleg, anterolateral view; E. Terminalia in lateral view; F. Terminalia in dorsal view; G. Terminalia in ventral view.

FIGURE 22. Live insects: A. Possible ♀ of S. annulatus (Redtenbacher, 1908) at Bako National Park, NW-Sarawak in October 2011 [© Francis Seow-Choen]; B. ♀ of Sadyattes matipuno sp. nov. at Real, Province Quezon, East Luzon, Philippines [© Albert Kang, https://www.inaturalist.org/observations/61368792].