Stenorhamphus phuphan, Smith & Hwang & Weirauch, 2019

Smith, Samantha, Hwang, Wei Song & Weirauch, Christiane, 2019, Synonymy of Mangabea and Stenorhamphus, with the description of two new species (Hemiptera: Reduviidae: Emesinae: Collartidini), Raffles Bulletin of Zoology 67, pp. 135-149 : 143-145

Stenorhamphus phuphan , new species

( Figs. 1–3 , 5B , 6 E–H, 7C, D, H, I, 8)

Diagnosis. Recognised within Stenorhamphus by the total length approximately 6.9 mm, one pair of setae posterior to each eye, setae along apex of second labial segment, along entire third segment, and basally along the fourth segment, four spines on the trochanter, fascicle of stout setae on the anterior area of the gena, postocular region long, not globulose, posterior lobe of pronotum approximately equal to anterior lobe, legs long, mid and hind coxae longer than length of abdomen, without spines on posterior lobe of pronotum.

Description. Male: small (total length, holotype: 6.89 mm) COLOURATION: general colouration yellow, with base of wings and posterior portion of head brown ( Figs. 2C, D ). Head: postocular region brown, anterior anteocular region lighter ( Fig. 3B ). Antenna: brown, flagellomeres light brown. Labium: light brown to yellow. Thorax: anterior pronotum yellow, posterior dark yellow to brown. Legs: coxae light brown to yellow, trochanters, femora, tibiae, and tarsi pale brown. Wings: basally brown, rest hyaline. Abdomen: tergites yellow; mediosternites pale brown, laterosternites somewhat darker; pygophore brown. VESTITURE: as in genus description with the following additions: Head: ventral surface with three to four pairs of long, stout setae located posterior to antennifer, at anterior and posterior margins of eye, lateral surface of head withone long, stout setae posterior to eye (four ventral and one lateral setae visible on right side, three setae on left) ( Figs. 3A, B ) fascicle of eight stout setae on gena ventrad of apex of maxillary plate ( Figs. 3A, B ); second labial segment (first visible) with medium-length stout setae on ventral surface in apical half of segment ( Figs. 3A, B ). Legs: forecoxa, in addition to short vestiture, with posterodorsal series and four stout, long setae anteroventral ( Figs. 3A ), foretrochanter with four stout setae on anterior surface ( Fig. 3E ), ventral surface of forefemur with about 16 medium stout setae in basal 2/3, interspersed with short setae ( Fig. 2C ). STRUCTURE: Head ( Figs. 2C, D , 3A, B, G ): postocular region long and slender, anteocular region less globulose than in S. segerak , new species. Thorax ( Figs. 2C, D , 3A, G ): posterior lobe wider than long, distinctly wider than anterior lobe, slightly depressed medially and with distinct, raised, lateral areas in posterior half of lobe, posterior margin slightly concave ( Figs. 2C, D , 3A, G ). Raised portion of mesoscutellum tongue shaped ( Fig. 3G ). Legs ( Figs. 2C, D , 3A, C, D, E ). Wings ( Figs. 2D , 5B ): elongate, surpassing apex of abdomen, rmcu cross vein not present ( Fig. 5B ). Abdomen ( Figs. 2C, D , 3F ). Genitalia ( Figs. 6E, F, G, H , 7C, D, H, I ): segment 8 well developed; pygophore elongate ovoid, with spine-like medial process, transverse bridge present ( Figs. 6E, F, G, H ); parameres slender, curved, apex pointed ( Figs. 6E, F , 7C ); aedeagus ( Figs. 7D, H, I ) with basal plates stout and strongly curved, ponticulus basilaris very slender to nonexistent, basal plate extension relatively short, stout ( Fig. 7D ), dorsal phallothecal sclerite heavily sclerotised posteriorly ( Fig. 7A ), endosoma with ventral and lateral, heavily sclerotised lobes, lateral lobes as tall as wide ( Figs. 7D, H, I ).

Measurements. See Table 1 .

Female. Unknown.

Etymology. Named after the locality of the holotype, Phu Phan National Park in Thailand; a noun in apposition.

Distribution. Only known from the type locality in Thailand.

Biology. Collected in lowland dry dipterocarp forest with deciduous trees and high canopy cover.

Type material. Holotype: male, THAILAND: Sakon Nakhon: Phu Phan National Park, behind forest protection unit at Huay Wien Prai, 17.1143°N, 104.0054°E, 387m, 25 Feb – 3 March 2007 Malaise trap, Sailom Tongboonchai ( RCW 4869), type deposited in the Queen Sirikit Botanic Garden, Chang Mai ( Thailand) ( QSBG) .

Discussion. Most similar to S. nubiferus due to the following shared characters: the distance from the posterior margin of the head to the anterior margin of the eye is approximately 1/3 the total length of the head (3:1), the third labial segment is the longest (12:1), and the pterostigma reaches 4/5 between rm cross vein and apex of wing (25:1). However, it is separated from S. nubiferus by the length of the posterior lobe of the pronotum in dorsal view being approximately equal to the anterior lobe (15:1), the pair of ventral setae in position 2 present (6:1), and four ventral spine-like setae on forecoxa (19:4).

Figures

Fig. 1. Phylogenetic hypothesis of Collartidini, based on morphological characters. Upper phylogeny: Fundamental parsimony tree, built using 25-character morphology matrix.Percentages above branches are jackknife support values (100 replications).As each fundamental tree differs only in relationships among Collartida, the first tree was arbitrarily chosen for jackknife analysis. Lower phylogeny: Strict consensus tree out of three equally parsimonious trees, with 11 Collartidini and 5 outgroup species. Numbers above branches refer to characters from morphology matrix, numbers below branches refer to character states. Synapomorphies for Collartidini and Stenorhamphus are listed.

Fig. 2. Dorsal and lateral habitus of the holotypes of Stenorhamphus segerak, new species and S. phuphan, new species. A, S. segerak, male, lateral (note four spines on head, spines along labium, spine on posterior lobe of pronotum, long coxa and antenna); B, S. segerak, male, dorsal (note spines on posterior lobe of pronotum, length of hemelytra, size of postocular region, length of posterior lobe of pronotum); C, S. phuphan, male, lateral (note ventral spines on head, length of mid and hind legs, general colouration); D, S. phuphan, male, dorsal (note long legs, postocular segment present).

Fig. 3. Stenorhamphus phuphan details of head, legs and metanotum. Scale set to 0.2 mm unless otherwise specified. A, Head and thorax, lateral view (two pairs of ventral setae anterior to eye, one pair of ventral setae posterior to eye, one pair of lateral setae posterior to eye); B, Head, lateral view (fascicle, setae 1, 2, 3, labrum (lr), clypeus (cly), maxillary plate (mxpl), mandibular plate (mdpl)); C, Foretarsus (simple); D, Midtarsus (simple); E, Foretrochanter (four spines); F, Spiracle on 7th abdominal segment; G, Head, dorsal view, pronotum, metanotum (clypeus, eyes drop-shaped, metanotal spine).

Fig. 5. Stenorhamphus segerak and S. phuphan forewing. Anterior wing margin on the left. A, S. segerak forewing, Pcu vein present but not visible in image; B, S. phuphan forewing.

Fig. 6. Pygophores of Stenorhamphus segerak and S. phuphan in dorsal, ventral, posterior and lateral views. Scale set to 0.5 mm. A–D, S. segerak pygophore, dorsal, ventral, posterior, and lateral view respectively; E–H, S. phuphan pygophore, dorsal, ventral, posterior, and lateral view respectively.

Fig. 7. Paramere and phallus of Stenorhamphus segerak and S. phuphan in dorsal, ventral, posterior and lateral views. Scale set to 0.2 mm unless otherwise stated; A, S. segerak, phallus; capitate process (cp), basal plate (bp), basal plate extension (bpext), endosomal struts of aedeagus (est), endosomal lateral lobe (ell), dorsal phallothecal sclerite (dps); B, S. segerak paramere; C, S. phuphan paramere. D: S. phuphan phallus; basal plate (bp), basal plate extension (bpext), capitate process (cp), endosomla lateral lobe (ell), (est), endosomal ventral lobe (evl); E, S. segerak ventral phallotheca, spined; F, G, S. segerak dorsal, ventral phallus respectively; H, I, S. phuphan dorsal, ventral pygophore respectively.