Arria Stal, 1877

Chao, Michael, 2025, Description and Genetic Barcode of Arria stanleyi sp. nov. (Mantodea: Haaniidae), a new moss-mimicking mantis species from Vietnam, Zootaxa 5588 (3), pp. 476-484 : 477-481

Genus Arria Stal, 1877

Type Material

Holotype. Female, Vietnam, Vĩnh Phúc Province, Tam Đ ảo district; 21.49611° N, 105.6129°E; 1140 m; July 6, 2023; Michael Chao.

Paratypes. Male, captive bred with parent having same collection data as holotype. Female, captive bred with parent having same collection data as holotype .

Description

Coloration: Body mostly green with large black splotches scattered randomly. Vertex of the head with slim vertical banding, lower frons fully green, compound eye green with series of horizontal brown banding. Antenna entirely black. Prozone highly speckled with brown dots with two large black blotches present beneath the major conical tubes; metazone with similar pattern. Dorsal abdominal tergites rustic in color with corresponding lobes light green; lateral tergites darker brown. Sternites light green. Prothoracic legs green, vertical banding uniformly present from start of coxa to end of tibia; meso- and meta legs exhibiting same color scheme. Male forewings greenish brown with high amount of black speckling all about, underwings clear.

Female: Head: Triangular, wider than long. Compound eyes globular, antero-laterally protuberant. Ocelli small, ellipse shape. Vertex wide and smooth. Juxta ocular bulges not prominent, slight swelling on apex with many small granules. Lower frons short, wider than long; U-shaped. Clypeus semicircular, elevated; pointed at the center with a smooth apex. Labrum smooth surface, rounded margins. Scape rotund, cylindrical shape, with small circular pedicel. Antennae short, filiform; black coloration.

Pronotum: Slender. Slight swelling of posterior prozone and anterior metazone. Small spines all along lateral margin. Dorsal surface of prozone with high concentration of tubercles. Pair of small conical tubes present on both right and left side of dorsal line of prozone. Metazone dorsal margin with scattered tubercles. One large conical tube present on both sides of medial keel of metazone, located just before the spuracoxal sulcus. Diamond shaped lateral pronotum expansion, with most expanded toward the spuracoxal sulcus. Postcervical plate, longer than wide. Intercervical sclerite, stout, crescent shaped. Both left and right intercervical sclerite of equal size, meet at a slight angle. Prominent torus intercervacalis. Stalky lateral cervical sclerite, with most girth towards the intersection with intercervical sclerite. Lateral margin slightly arched. Two large ventral cervical sclerite, parallel to each other. Of equal size, cylindrical shape.

Prothoracic leg: Slender. Forecoxae longer than forefemur, having uniformly placed denticles all across the ventral and dorsal margin. Lateral margin bearing row of denticles starting from the base of the coxae to base of the coxal lobe. Coxal lobes divergent, dorsal lobe slightly longer than ventral lobe. Femora slim, with a circular infuscate patch present in the middle of the femur’s length. Tibial spine groove found behind the infuscate patch. Femoral brush ellipse shape; located on distal end. Dorsal margins with large denticles; proximal ventral margin before spines with tubercles. Femora with 4 posteroventral spines, 4 discoidal spines, 12 anteroventral spines (11–12 on left femora). One spine located on both anterior and posterior genicular lobe. Tibia with 5 posteroventral spines and 8 anteroventral spines, slight arc on dorsal margin. Tarsus longer than tibia, first joint of tarsi longer than rest of the tarsi. Spination formula: F= 4DS/11-12AvS/4PvS; T = 8AvS/5PvS.

Meso-and metathoracic leg: Long and slender. Femora and tibia are of similar length and size. Femora smooth and straight with small spines running along ventral margin. Dorsal margin lined with small setae. Femoral genicular lobe with anterior dorsal lobe possessing one small spine. Tibia slender with small spines on lateral margin and smooth dorsal margin. One apical spine present on tibia. First tarsomere longest, longer than other tarsomere combined.

Abdomen: Longer than its wide, thick, elliptical in shape. Tergites 3–6 with prominent dorsal tergal lobe, with tergite 3 possessing the largest dorsal lobe and lobes consecutively getting smaller afterwards. Each dorsal tergal lobe foliaceous, with curved margin on the distal side. Proximal margin concave. lateral tergal lobes present on tergite 3–9, 3–7 prominent, 8–9 almost not visible, triangular. Pronounced spiracles present under lateral tergal lobes. All sternites smooth, rounded apex. Ovipositor longer than supra-anal plate, triangular. Supra-anal plate stout, semicircular shape; significantly wider than ovipositor. Posterior margin smooth. Linear middorsal carnia, extending from base to apex of supra-anal plate, protuberant. Cerci hairy, with a conical terminal joint.

Male: Head: Similar to female, but ocelli is large and globular in shape. Juxta ocular bulges even less prominent, almost leveled with the vertex. Vertex short. Clypeus semicircular, only slightly elevated with a small rounded dorsal point in the center. Antenna longer than pronotum, filiform, black coloration.

Pronotum: Slender. Slight swelling of posterior prozone and anterior metazone. Small spines present only on lateral pronotum extension. Distal end of metazone and proximal end of prozone meet at supracoxal sulcus at a concave angle forming a depression. Prozone elongate. Tuberculate dorsal margin. Highly arched and swollen. Two conical tubes present at distal end of metazone before the supracoxal sulcus. Lateral pronotum extension thin and short. Dorsal margin smooth, with few tubercles. Intercervical sclerite stout, crescent shape. Both right and left intercervical sclerite meet at an angle forming a convex shape. Thin torus intercervacalis. Slender lateral cervical sclerite. Ventral cervical sclerite same shape and placement as female.

Prothoracic leg: Long and slender. Forecoxae longer than forefemur, row of small denticles across dorsal and ventral margins. Lateral margin with row of small denticles. Coxal lobes divergent, dorsal lobe longer than ventral lobe. Femora slim, with elliptical infuscate present in the middle of femora’s length. Tibial spine groove located behind the infuscate patch. Femora dorsal margin with row of small setae. Proximal ventral margin before spines with tubercles. Femora with 4 posteroventral spines, 4 discoidal spines, 12 anteroventral spines (11 on left femora). One spine located on both anterior and posterior genicular lobe. Tibia with 5 posteroventral spines and 5 anteroventral spines. Tarsus longer than tibia, first joint of tarsi longer than rest of the tarsi. Spination formula: F=4DS/11-12AvS/4PvS; T=5AvS/5PvS.

Meso- and metathoracic leg: Similar to female but setae covering all of femora and tibia.

Wings: Forewing long and narrow, with narrowly rounded apex. Coastal area thick towards body and narrows outwards with randomly arranged stains. Hind wing with truncated apex, protrudes from underneath forewing during resting position.

Abdomen: Long and slender; flat. All tergites smooth, with acute lateral lobes on both sides of each tergite. Sternites smooth with rounded apex. Sub genital plate narrow, rounded margins, pointed at the end. Subgenital lobe elongate, smooth surface; dorsal margins arched. Cerci long, hairy; with conical terminal joint. Styli short; narrow, robust base, located near each other.

Phallic complex:

Right Ventral phallomere: R3 long and narrow, bulbous end with dived in the center of lateral margin. Pva thick and highly pronounced, tightly curved toward fda; margins smooth and rounded. Pia thin with area toward pva transluscent and progressively more pronounced toward fda; bulbous area located in the center. Fda short and anteriorly curving, small spinulations on the margin.

Left Ventral phallomere: L4A spade shaped. Ventral surface smooth. Distal lateral margin smooth and ends at a pointed apex. Proximal lateral right margin most sclerotized. Dorsal surface smooth, concave. Posterior process long, thick; directed to the left and curves up. Right margin toward posterior process, narrow and lobes into the posterior process. Highly sclerotized. Right margin to the apex highly spinulated. Points forward rather than forming a hook with a rounded apex. Left margin toward posterior process with arch and posterior process starting at the end of arch.

Left dorsal phallomere: L4B longer than its wide, distal end rectangular shape; convex. Sclerite L1 of left phallomere short, strait; lateral margins anteriorly curving. Sclerite L2 of left phallomere middle constricted to from elliptical bulges on both distal and proximal ends. Posterior process wide, rounded apex, directed toward left, anteriorly curves. Anterior process bulbous, cone shaped, concaved in the middle. Posteromesal stout, triangular shape, margins all rounded.

Ootheca: Small, rectangular with smooth margins.

Etymology: The new species is named in honor of my father who has devoted his life for me.

Measurements (in mm, holotype in parenthesis)

Male. Body (head to abdomen): 44.0; pronotum: 13.0, front coxa: 0.8; fore femora: 10.0; fore tibia: 4.0; mesothoracic femora: 11.0; mesothoracic tibia: 8.0; metathoracic femora: 12.0; metathoracic tibia: 12.0; fore wing: 31.0; hind wing: 29.0.

Female. Body (head to abdomen) 38.0 (43.0); pronotum: 13.0 (16.0); fore coxa: 8.0 (12.0); fore femora: 11.0 (11.0); fore tibia: 6.0 (6.0); mesothoracic femora: 10.0 (13.0); mesothoracic tibia: 12.0 (12.0); metathoracic femora: 12.0 (15.0); metathoracic tibia: 13.0 (14.0).