Isagoras similis, Conle & Hennemann & Bellanger & Lelong & Jourdan & Valero, 2020

Conle, Oskar V., Hennemann, Frank H., Bellanger, Yannick, Lelong, Philippe, Jourdan, Toni & Valero, Pablo, 2020, Studies on neotropical Phasmatodea XX: A new genus and 16 new species from French Guiana, Zootaxa 4814 (1), pp. 1-136 : 57-59

publication ID	https://doi.org/ 10.11646/zootaxa.4814.1.1
publication LSID	lsid:zoobank.org:pub:15CFB5E4-B48B-4DD9-A49E-D52BBC9ACC34
DOI	https://doi.org/10.5281/zenodo.4340841
persistent identifier	https://treatment.plazi.org/id/00102209-FF95-FF87-FF40-44D7FEF6F846
treatment provided by	Plazi
scientific name	Isagoras similis
status	sp. nov.

Treatment

Isagoras similis View in CoL n. sp.

( Figs. 25–27 View FIGURE 25 View FIGURE 26 View FIGURE 27 )

HT, ♂: Arataye Affl. Approuagues, 8km NE pied Saut Parare, 8.V.1988; Mus. Paris, Guyane Française, L. Desutter rec.; Chasse de nuit [ MNHN] .

PT, 1 ♀: Guyane Franc., St.- Jean du Maroni, Collection le Moult ; Mus. Paris, Collection L. Chopard 1919. [ MNHN] .

PT, 1 ♀: Französisch Guyana: Commune de Régina , Nouragues, Saut Pararé, 4°02’N– 52°41’W, S.E.A.G., leg. Stéphane Brûlé 03.09.2009 [coll. OC, No. 0302-1] GoogleMaps .

PT, 1 ♂: Französisch Guyana: Commune de Régina , Nouragues, Saut Pararé, 4°02’N– 52°41’W, S.E.A.G., leg. Stéphane Brûlé 2010 [coll. OC, No. 0302-2] GoogleMaps .

PT, 2 ♂♂: Französisch Guyana: Commune de Régina , Petite Montagne Tortue (Ost), Terra firme, 04°19’14.1N– 52°14’27.5W, S.E.A.G., leg. Greg Lamarre 23.06.2010 [coll. OC, No. 0302-3, 0302-5] GoogleMaps .

PT, 1 ♂: Französisch Guyana: Commune de Régina , Nouragues, Saut Pararé, 4°02’N– 52°41’W, S.E.A.G., leg. Stéphane Brûlé 04.07.2010 [coll. OC, No. 0302-4] GoogleMaps .

PT, 1 ♂: Französisch Guyana: Commune de Régina , Nouragues, Saut Pararé, 4°02’N– 52°41’W, S.E.A.G., leg. Stéphane Brûlé 28.06.2013 [coll. OC, No. 0302-6] GoogleMaps .

PT, 1 ♀: GUY13-128, Guyane, Saül , 8-23.X.2013, coll. ASPER [ MNHN] .

PT, 5 eggs from: GUY13-128, Guyane, Saül , 2013 [ ASPER-PL] .

PT, 8 eggs from: GUY13-128, Guyane, Saül , 2013 [ ASPER-YB] .

Etymology. The name of this new species emphasizes on the conspicuous overall similarity with Isagoras brevipes Redtenbacher, 1906 from Brazil and Isagoras tacanae Günther, 1940 .

Differentiation. ♂♂ of this new species are similar to I. tacanae Günther, 1940 , I. obscurum ( Guérin-Méneville, 1838) and I. brevipes Redtenbacher, 1906 . From the first ♂♂ clearly differ by the shorter and not pointed anal segment. From I. brevipes it differs by the posteriorly flattened anal segment in ♂♂, which has the posterior margin only half as broad as the anterior margin (almost of uniform width in brevipes ) and the longer profemora in the ♀♀ (at least 2.5x longer than head). From I. obscurum ( Guérin-Méneville, 1838) it differs by the distinctly shorter cerci in both sexes.

Description. ♀ ( Fig. 25 View FIGURE 25 ). Typical size for the genus. Length of body 67.2–67.3mm. General colour of body beige to dark brown with indistinct drab mottling. Head, thorax and abdomen studded with many granules. Mesonotum 3x longer than pronotum. Antennae straw-coloured with indistinct brown annulations. Tegmina and costal area of alae dark brown with indistinct brown mottling to beige with greenish-beige speckles; sub-basal elevations distinctly raised, convex and of rough structure. Anal area of alae uniformly brownish translucent. Alae reaching posterior margin of tergum VII or even IX. Legs straw-coloured to brown with dark brown indistinct mottling. Profemora and protibia undulate. Cerci small and short, round in cross-section, constricted towards a rounded apex, at best reaching posterior margin of anal segment. Subgenital plate short and flat, constricted towards a rounded apex, at best reaching centre of tergum VIII. Epiproct deeply incised posteromedially. Gonapophysis slightly projecting over posterior margin of tergum IX. Profemora about 2.5x longer than head. Basitarsus 2x longer than second tarsomere.

Measurements PT [mm]: Body 67.2–67.3, pronotum 4.1–4.5, mesonotum 10.3–11.5, metanotum 7.1–7.2, median segment 3.0–3.1, tegmina 9.5–11.3, alae 38.5–44.7, profemora 10.2–10.5, mesofemora 9.7–9.7, metafemora 12.8–13.8, antennae> 26.0–27.5.

♂ ( Figs. 26–27 View FIGURE 26 View FIGURE 27 ). Length of body 50.5–56.5 mm. Similar to ♀, but more slender, mesonotum 3.5–4x longer than pronotum and profemora and protibia simple, at best profemora slightly undulate. Cerci very short and small, one third of the length of anal segment, constricted towards posterior, not reaching posterior margin of anal segment. Anal segment constricted towards posterior (in lateral aspect), the posterior margin only half as broad as anterior margin; distinct rounded notch for the cerci. Poculum large and bowl-shaped, reaching to anterior third of anal segment; having a distinct ventromedian keel that reaches from anterior margin to the rounded posterior margin. Posterior margin of the epiproct distinctly incised.

Measurements HT [mm]: Body 50.4, pronotum 1.3, mesonotum 8.9, tegmina 6.6, alae 31.9, profemora 9.4, mesofemora 7.7, metafemora 11.0, antennae>47.9.

Measurements PT [mm]: Body 50.5–56.5, pronotum 2.5–2.7, mesonotum 8.5–9.7, metanotum 4.5, median segment 2.3, tegmina 6.2–6.6, alae 31.3–33.9, profemora 8.5–10.3, mesofemora 7.3–8.1, metafemora 10.4–12.4, antennae> 51.0.

Egg ( Fig. 25 View FIGURE 25 ). Small, barrel shaped and slightly ovoid in centre, 1.4x longer than wide; brown; surface densely covered with minute rounded granules; set with many setae all over capsule and operculum. Micropylar plate small and oval, 1.4x longer than wide; at best 1/4 the length of capsule. Median line about as long as micropylar plate. Operculum oval, 1.1x higher than wide, slightly convex, surface as in capsule.

Measurements PT [mm]: Total length 2.3, length 2.1, width 1.5, height 1.7, diameter of operculum 0.8–0.9, length of the micropylar plate 0.6.

Distribution. French Guiana: Arataye Affl. Approuagues [MNHN]; St.-Jean du Maroni [MNHN]; Commune de Régina, Nouragues, Saut Pararé [coll. OC]; Commune de Régina, Petite Montagne Tortue (Ost) [coll. OC]; Saül [MNHN].