Homalocnemis praesumpta Collin, 1933
publication ID |
https://doi.org/ 10.11646/zootaxa.5222.2.5 |
publication LSID |
lsid:zoobank.org:pub:AB8A29BD-87BF-4913-8501-51AD7B647E67 |
DOI |
https://doi.org/10.5281/zenodo.7469964 |
persistent identifier |
https://treatment.plazi.org/id/03D9A938-AF1A-FF84-CE87-5D09FCCAA4C9 |
treatment provided by |
Plazi |
scientific name |
Homalocnemis praesumpta Collin, 1933 |
status |
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Homalocnemis praesumpta Collin, 1933
( Figs 13–27 View FIGURES 13–15 View FIGURES 16–21 View FIGURES 22–27 , 28 View FIGURE 28 )
Homalocnemis praesumpta Collin, 1933: 31 , figs. 6b, c. Type-locality: Ancud, Chiloé Is., Chile.
Syntypes. Four males, one female ( NHMUK); one male ( OUMNH). See Pont (1995: 135) for label details .
Distribution. Chile: Región de La Araucanía: Malleco Province (Termas de Tolhuaca, Sierra de Nahuelbuta); Región de Los Lagos: Osorno Province (PN Puyehue, Termas Aguas Calientes), Llanquihue Province (Ensenada, Puerto Varas); Chiloé Province (Ancud, Chiloé I.) ( Fig. 28 View FIGURE 28 ).
References. Stuardo, 1946: 104 (cat.); Smith, 1967: 9 (cat.); Chvála, 1991: 13 (com.); Pont, 1995: 135 (typ.); Yang et al., 2007: 280 (cat.).
Diagnosis. In addition to features in the key, this species is distinguished by the absence of a digitiform epandrial process, male cerci fused to surstylus posterolaterally and female sternite 8 greatly enlarged, and apex deeply bilobed.
Redescription. Wing length: 4.4–6.1 mm. Male ( Figs 13–21 View FIGURES 13–15 View FIGURES 16–21 ). Predominantly black with mesopleuron and coxae gray pruinose ( Fig. 13 View FIGURES 13–15 ). Front of scutum entirely dull black; prescutellar depression with broad, rectangular pruinose patch. Palpus with long blackish setae ( Fig. 14 View FIGURES 13–15 ). Wing infuscate, anal lobe weakly developed ( Fig. 15 View FIGURES 13–15 ). Vein R 2+3 gently upcurved distally, ending after level of branching of vein R 4+5. Section between veins R 2+3 and R 4 shorter than section between veins R 4 and R 5 ( Fig. 15 View FIGURES 13–15 ). Hind tarsomere 1 not swollen. Tergite 8 half-length of respective sternite ( Figs 16, 17 View FIGURES 16–21 ), narrowed medially; sternite 8 with desclerotized or depigmented medial area ( Fig. 17 View FIGURES 16–21 ); remaining pregenital sclerites unmodified. Terminalia highly sclerotized. Epandrial lamellae broadly quadrate, somewhat inflated, fused narrowly along dorsal bridge; without subapical process ( Fig. 18 View FIGURES 16–21 ). Cercus laminar, narrowly tapered anteriorly; broadly fused to surstylus posterolaterally ( Fig. 18 View FIGURES 16–21 ). Hypoproct membranous, clothed in minute setulae ( Fig. 18 View FIGURES 16–21 ). Subepandrial sclerite broadly V-shaped, extending as bacilliform sclerites to surstylus; surstylus fused broadly with epandrium ( Fig. 18 View FIGURES 16–21 ). Hypandrium with gonocoxal apodeme well developed, expanded horizontally; gonocoxal apodemes united dorsally by upright phallic plate ( Fig. 19 View FIGURES 16–21 ); phallic plate tapered dorsally to base of subepandrial sclerite, opposite dorsal bridge of epandrial lamellae. Postgonites fused dorsally across hypandrium into elongate, upright digitiform process, rod-shaped with rounded apex ( Fig. 19 View FIGURES 16–21 ). Apex of hypandrium articulated with phallus ( Fig. 19 View FIGURES 16–21 ). Phallus with paired, short, acute lateral projections and deeply forked apex ( Fig. 20 View FIGURES 16–21 ). Ejaculatory apodeme slender, elongate, positioned within hypandrium, separated from base of phallus ( Figs 19, 21 View FIGURES 16–21 ).
Female ( Figs 22–27 View FIGURES 22–27 ). Same pattern of color as male ( Fig. 22 View FIGURES 22–27 ). Sternite 8 paired, narrowly connected ventrally ( Fig. 24 View FIGURES 22–27 ), enlarged basally, elongate, posteroventrally directed into projecting lobes; clothed in distinct apical setae ( Fig. 23 View FIGURES 22–27 ). Syntergite 9+10 absent. Sternite 10 ( Figs 25, 26 View FIGURES 22–27 ) triangular in dorsal view, with narrow, darkly pigmented anterior margin; dark band loosely connected or separated from pair of thinly sclerotized medial plates. Genital fork not observed, probably not sclerotized. Cercus ovoid ( Figs 24–26 View FIGURES 22–27 ). Spermatheca well sclerotized, subspherical ( Fig. 27 View FIGURES 22–27 ).
Material examined. CHILE. Región de La Araucanía: Province Malleco, Termas de Tolhuaca [38°14′06″S – 71°43′58″W], 1989, L. Peña (1♁, CNC) GoogleMaps ; Región de Los Lagos: Prov. Osorno, Parque Nacional Puyehue, Termas Aguas Calientes, 40°44′S – 72°19′W, 440 m, 14–31.i.2017, sweeping, V.C. Silva & D.S. Amorim (1♁, MZUSP; 1♁, INPA) GoogleMaps ; Prov. Llanquihue, Volcán Osorno, 322 m, 41°10′09″S – 72°30′51″W, 8.ii.2011, sweeping, D.S. Amorim (1♁, 1♀, MNNC; 1♁, 1♀, INPA) GoogleMaps ; [Province Malleco], Sierra de Nahuelbuta , W. of Angol, 1200 m, 3.i.1951, leg. Ross & Michelbacher (1♀, CAS) [37°49′40″S – 72°59′27″W] GoogleMaps ; [Province Llanquihue], 8 miles W. of Puerto Varas, 16.i.1951, leg. Ross & Michelbacher (1♀, CAS) [41°19′27″S – 73°08′41″W]. GoogleMaps
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Homalocnemis praesumpta Collin, 1933
Rafael, José A., Marques, Dayse W. A., González, Christian R. & Sinclair, Bradley J. 2022 |
Homalocnemis praesumpta
Collin, J. E. 1933: 31 |