Amphineurus (Rhamphoneurus) glabristylatus Alexander, 1929a

Santos, Daubian, Santos, Rodrigo dos Reis & Ribeiro, Guilherme Cunha, 2022, Systematics of Amphineurus (Rhamphoneurus Alexander) (Diptera: Tipuloidea: Limoniidae), Arthropod Systematics & amp; Phylogeny 80, pp. 439-494 : 439

3.3.13. Amphineurus (Rhamphoneurus) glabristylatus Alexander, 1929a

Amphineurus (Rhamphoneurus) glabristylatus Alexander, 1929a: 188 (description, fig. 224: male terminalia).

Material examined.

Paratypes: 1 ♂, Chile, Chiloé Is., Mechuque Is. [42°18′S 73°16′W], 23-XII-1926, F. & M. Edwards (USNM). 1 ♂, Chile, Peulla [41°5′S 72°1′W], 12/ 13-XII-1926, F. & M. Edwards (USNM); 1 ♂, Chile, Chiloé Is., Mechuque Is. [42°18′S 73°16′W], 23/ 26-XII-1926, F. & M. Edwards (USNM)*. - Additional material: ARGENTINA. 1 ♀, Bariloche , Rio Negro [41°7′S 71°24′W], XI-1926, R. & E. Shannon (USNM) . CHILE. 1 ♂, 1 ♀ and 4 [sex unknown], Arauco, Nahuelbuta, Butamalal [37°49′S 73°14′W], 1100-1400 m, 23/ 31-I-1954, Peña (USNM) ; 2 ♀ and 1 ♂, Arauco, Nahuelbuta [37°46′S 72°59′W], 2-II-1953, Peña (USNM) ; 1 ♀ and 1 [sex unknown], Arauco, Nahuelbuta [37°46′S 72°59′W], 12/ 20-II-1958, Peña (USNM); 1 [sex unknown], Chiloe Is. , Chepu [42°2′S 74°1′W], 4/ 6-IV-1968, Peña (USNM); 1 [sex unknown], Arauco, Nahuelbuta , Butamalal [37°49′S 73°14′W], 1400 m, 23/ 31-I-1954, Peña (USNM) ; 1 ♀ and 1 [sex unknown], Chiloé Is., Aulen [42°2′S 74°1′W], 8-II-1952, L.P. Guzman (USNM); 1 [sex unknown], Arauco, Nahuelbuta [37°46′S 72°59′W], 21/ 25-II-1958, Peña (USNM); 1 [sex unknown], Malleco , Rio Blanco [38°23′S 71°48′W], 27-II-1951, Peña (USNM); 1 [sex unknown], Arauco, Nahuelbuta [37°46′S 72°59′W], 120-1100m., 9-I-1954, Peña (USNM) ; 1 ♀, Chiloé Is., Aucar [42°9′S 73°30′W], 15-I-1952, L. P. Guzman (USNM); 1 [sex unknown], Osorno, Pucotrihue [40°32′S 73°42′W], 10/ 12-IV-1948, Peña (USNM) ; 2 ♂ and 1 [sex unknown], Arauco, Nahuelbuta, Pichinahuel [37°48′S 73°02′W], 1400-1600 m, 21/ 25-II-1953, Peña (USNM) *; 2 ♂, Arauco, Nahuelbuta, Butamalal [37°49′S 73°14′W], 1100-1400 m, 23/ 31-I-1954, Peña (USNM) *; 1 ♂, Nahuelbuta, Caramavida [37°40′S 73°20′W], 120-1100 m, 9-I-1954, Peña (USNM) (det. as A. (R.) nothofagetorum by Alexander) *; 1 ♂, Arauco, Nahuelbuta, Butamalal [37°49′S 73°14′W], 1400 m, 23/ 31-I-1954, Peña (USNM) *; 1 ♂, Arauco, Nahuelbuta, Pichinahuel [37°48′S 73°02′W], 14-1600 m, 12/ 20-II-1953, Peña (USNM) *; 1 ♂, Chiloé Is., Aulen [42°2′S 74°1′W], 4-II-1952, Peña (USNM) *; 1 ♂, Osorno, Pucotrihue [40°32′S 73°42′W], 10/ 12-IV-1968, Peña (USNM) *; 1 ♂, Malleco, Rio Blanco [38°23′S 71°48′W], 1050 m, 27-III-1951, Peña (USNM) *.

Diagnosis.

This species is distinguished by the sinuous anal vein and straight m-cu. Furthermore, this species has characteristic male terminalia with a folded medial branch of the clasper of gonostylus without setae, an unpigmented male tergite IX, sinuous sheath of aedeagus, and the right mesal lobe is longer than the left mesal lobe, with a cylindrical apical tip.

Redescription.

Wing length 7.07 mm, width 2.22 mm. - Coloration: General coloration brown. Rostrum and palpus dark brown. First segments of antenna light yellow, remainding segments dark yellow. Head dark brown. Eyes gray. Thorax brown, pleura yellowish brown. Three reddish-brown stripes on scutum. Halter dark yellow with knob ochreous. Coxae yellowish-brown and legs brown. Abdomen brown. - Head (ventral view Fig. 18A , dorsal view Fig. 18B ): Rostrum bifurcated with long appendices; first palpal segment shorter than terminal segment; scape as broad as pedicel, terminal flagellomere as long as penultimate; antenna with several long setae. - Thorax (lateral view Fig. 18E , dorsal view Fig. 18F ). Anatergite taller than katatergite; prescutum with long setae (Fig. 29B ); mediotergite with notch on posterior margin (Fig. 18F ). Halter with dilated knob. Wing (Fig. 18D ) with several markings, including subtle marking on A1; slightly darkened areas along medial veins; markings on Rs, R2+3+4 and m-cu; strong markings on R2 and near end of R1; veins near fork of bM (Fig. 18C ) faded; M1+2 longer than basal deflection of M1, R2+3 longer than R2+3+4. - Female terminalia (Fig. 18H ): Female tergite IX shorter, narrower than tergite X. Hypogynial valves slender, longer than cercus. Cercus strongly curved dorsad. - Male terminalia (Fig. 18G ): Male tergite IX unpigmented, with shallow median U-shaped notch, with additional shallow sublateral notch on either side creating sinuous appearance. Ventral branch of gonocoxite wide. Dorsal branch of gonocoxite long, almost as long as ventral branch. Lobe of gonostylus with rounded lobule; lobule as long as wide, shorter than half-length of lobe of gonostylus, wider than stem. Clasper of gonostylus with differently shaped branches: lateral branch straight; medial branch curved, club-shaped. Mesal lobes of gonocoxite asymmetrical, both elongated and slightly rounded at posterior margin; left mesal lobe wider than right. Sheath of aedeagus straight, dark almost entire length.

Remarks.

We could not examine the holotype, but the paratypes were examined. This species resembles A. (R.) chiloeanus Alexander but differs mainly in the attachment of m-cu, length of female cercus, shape of male tergite IX, sheath of aedeagus and mesal lobe.

Figures

Figure 18. Amphineurus (Rhamphoneurus) glabristylatus Alexander. A head (ventral view); B head (dorsal view); C detail of wing; D wing; E thorax (lateral view); F thorax (dorsal view); G male tergite IX (dorsal view) and remainder of male terminalia (lateral view); H female terminalia (dorsal view). - Abbreviations: aed sh, sheath of aedeagus; anatg, anatergite; anepm, anepimeron; anepst, anepisternum; aprn, anteropronotum; cer, cercus; cgonst, clasper of gonostylus; cx, coxa; goncx, gonocoxite; hlt, halter; hyp val, hypogynial valve; k, knob of halter; kepm, katepimeron; kepst, katepisternum; ktg, katatergite; l ms, left mesal lobe of gonocoxite; lgonst; lobe of gonostylus; mr, meron; mtanepst, metanepisternum; mtepm, metepimeron; mtg, mediotergite; mtkepst, metakatepisternum; mtn, metanotum; p, posterior basalare; patg, paratergite; pprn, postpronotum; presct, prescutum; r ms, right mesal lobe of gonocoxite; sct, scutum; sctl, scutellum; st, sternite; tg, tergite; t 9, male tergite IX.

Figure 29. Amphineurus (Rhamphoneurus) stigamticus sp. nov. A head (ventral view); B head (dorsal view); C detail of wing; D wing; E thorax (lateral view); F thorax (dorsal view); G male tergite IX (dorsal view) and remainder of male terminalia (lateral view); H female terminalia (dorsal view). - Abbreviations: aed sh, sheath of aedeagus; anatg, anatergite; anepm, anepimeron; anepst, anepisternum; aprn, anteropronotum; cer, cercus; cgonst, clasper of gonostylus; cx, coxa; goncx, gonocoxite; hlt, halter; hyp val, hypogynial valve; k, knob of halter; kepm, katepimeron; kepst, katepisternum; ktg, katatergite; l ms, left mesal lobe of gonocoxite; lgonst; lobe of gonostylus; mr, meron; ms lobe, mesal lobe of gonocoxite; mtanepst, metanepisternum; mtepm, metepimeron; mtg, mediotergite; mtkepst, metakatepisternum; mtn, metanotum; p, posterior basalare; patg, paratergite; pprn, postpronotum; presct, prescutum; r ms, right mesal lobe of gonocoxite; sct, scutum; sctl, scutellum; st, sternite; tg, tergite; t 9, male tergite IX.