Temnomastax latens Rehn & Rehn, 1942

Olivier, Renan S., Pujol-Luz, Cristiane V. A. & Graciolli, Gustavo, 2019, Review of Temnomastax Rehn & Rehn, 1942 (Orthoptera, Caelifera, Eumastacidae, Temnomastacinae), Zootaxa 4593 (1), pp. 1-78 : 46-48

publication ID	https://doi.org/ 10.11646/zootaxa.4593.1.1
publication LSID	lsid:zoobank.org:pub:3491BEB3-53F4-413A-A05D-48BB0C7029DF
persistent identifier	https://treatment.plazi.org/id/797887DC-3E74-5E3B-FF1A-9ECFFE56FE49
treatment provided by	Plazi
scientific name	Temnomastax latens Rehn & Rehn, 1942
status

Treatment

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:39957

Figures 1 View FIGURE 1 , 4C View FIGURE 4 , 5C View FIGURE 5 , 6C View FIGURE 6 , 7A View FIGURE 7 , 8C View FIGURE 8 , 9C View FIGURE 9 , 10C View FIGURE 10 , 12C View FIGURE 12 , 13C View FIGURE 13 , 14C View FIGURE 14 , 15C View FIGURE 15 , 18C View FIGURE 18 , 22 View FIGURE 22 and 28A View FIGURE 28

Temnomastax latens Rehn & Rehn 1942: 12 (identification key), 16 ( Figures 3 View FIGURE 3 , 6 View FIGURE 6 , 9 View FIGURE 9 , 13 View FIGURE 13 , and 14), 21 (original description); Liebermann 1955: 333 (citation); Olivier 2014: 457 (citation), 460 ( Figure 6 View FIGURE 6 and identification key), 2017: 235 (citation); Olivier & Aranda 2018: 268 –275 (morphometric analysis).

Type locality. Brazil, Minas Gerais, Lassance , 9–19.XI.1919 (Cornell University Expedition; R.G. Harris)— holotype ♂ [Type no.5627] and 1 allotype ♀.

Depository. Holotype: Entomology Collection at The Academy of Natural Sciences of Dextrel University, Philadelphia, United States of America.

Etymology. Specific epithet alludes to the male cerci that is curved inward and downward being difficult to observe (from Latin. latens, ‘concealed’ or ‘hidden’) ( Rehn & Rehn 1942).

Diagnosis. Small (♂  15.95 mm, ♀ = 23.24 mm). Close to T. monnei sp. nov., but differs by the more protruding male eyes. Male tegmina reaching the epiproct and female tegmina reaching the 5 th abdominal tergite. 1 st abdominal tergite of female without distinct color. 7 th and 8 th abdominal tergites and 8 th and 9 th abdominal sternites of male yellow. Male cerci less compressed laterally at the base and less curved inward in the median region. MbEp seemingly sub-rectangular in dorsal view. Posteromedian portion of epiphallus with a beak-shaped tip. Female subgenital plate yellow and the lateral portions of posterior margin slightly concave before the central protrusion in ventral view.

Redescription. Male ( Figure 18C View FIGURE 18 ). Brasil, Goiás, SAMA, Minaçú, 30.IX.1986 (Bandeira, M.P.S. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]. Measurements (mm): bd 15.33, pt 1.90, tg 7.79, hf 11.81, ht 12.44.— Head: Subtriangular in frontal view ( Figure 4C View FIGURE 4 ). Antennae (2.54 mm). Fastigium (0.18 mm). Eyes very protruding in frontal view ( Figure 4C View FIGURE 4 ). Frons metallic blue. Clypeus and labrum yellow ( Figures 4C View FIGURE 4 and 28A View FIGURE 28 ). Mandibular joints brown. Mandibles yellow. Thorax: Pronotum: Slightly sellate, posterior region of pronotal disk slightly curved in lateral view ( Figure 6C View FIGURE 6 ). Pronotal disk blackish with blue maculae and yellow spots; posterior margin rounded ( Figure 6c View FIGURE 6 ). Thoracic sternites metallic blue. Wings: Brachypterous (tg / hf 0.66). Tegmina ellipsoidal; elongated with costal margin slightly convex in the ½ proximal and anal margin slightly concave, apex uniformly rounded; reaching the epiproct (4.0x the pronotum length); some oblique nervures present between costal margin and C and between C and Sc; R reaching the apex, without bifurcation; M bifurcating in Ma and Mp in the medium region; 1Cu present, reaching the ¼ distal; 2Cu reaching the median region; 1A and 2A well marked, 3A reduced ( Figure 7A View FIGURE 7 ). Membranous wings with five lobes when extended (remigium + four anal lobes); M present, arising from the median region of R+M and reaching the apex; Rs2 present; 1Cu and VD rectilinear and parallel; 1A–4A present, 5A reduced; 1a–4a present ( Figure 7a View FIGURE 7 ). Legs (Right/Left): Ventral face of protibiae with 9/ 8 outer spines and 7/7 inner spines. PrTm1 with approximately 2.5x the length of PrTm2. Ventral face of mesotibiae with 9/7 outer spines and 9/8 inner spines. MsTm1 with approximately 2.0x the length of MsTm2. Dorsal face of metatibiae with 21/25 inner spines and 22/22 outer spines. MtTm1 with approximately 3.0x the length of MtTm2. Abdomen: Posterior-ventral regions of the 9 th and 10 th abdominal tergites as in the Figure 8C View FIGURE 8 . Proximal region of epiproct broader than in T. hamus , lateral margins moderately folded downward, ⅓ distal sharply convergent, apex acute ( Figure 8c View FIGURE 8 ). Cerci not exceeding the length of epiproct in dorsal view ( Figure 8c View FIGURE 8 ); robust and subcylindrical at the base, laterally compressed in the ⅓ apical, curved inward in the median region and downward in the ⅓ apical, an acute process in the ventro-apical region present ( Figure 9C View FIGURE 9 ). Abdominal sternites yellow. Membranous apical area of subgenital plate fusiform horizontally, not expanded toward the apex; one central and two lateral carinae distinct. Posterior margin of subgenital plate slightly projected backward in lateral view ( Figure 8C View FIGURE 8 ). Apex of abdomen subtriangular in axial view. Phallic complex: Epiphallus: LREp elongated, making the MbEp seemingly subrectangular in shape in dorsal view ( Figure 10C View FIGURE 10 ); inner margin of the more sclerotized portion in the posterior region sinuous; lateral more sclerotized portions of the outer margin in the posterior region converging centrally in a beak-shaped tip ( Figure 10C View FIGURE 10 ); posterior region without upward curvature in lateral view ( Figure 10c View FIGURE 10 ); LPjEp uniformly expanded from proximal region to distal region ( Figure 10c View FIGURE 10 ) and with a small process curved and acute distally. Endophallus: Outer margin in the anterior region of endophallic plate bilobed, resembling butterfly-shaped; inner arc broad and circular; branches slight convergent and tips clearly divergent in ventral view ( Figure 12C View FIGURE 12 ); broad ventral curvature in the ¾ posterior in lateral view and slight ripples ventrally on the outer margin of branch ( Figure 12c View FIGURE 12 ); spermatophore sac as in the Figure 12c View FIGURE 12 ; ejaculatory sac ovoid, projected backward ( Figure 12c View FIGURE 12 ).

Female ( Figure 18C View FIGURE 18 ). Brasil, Goiás, SAMA, Minaçú, 01.X.1986 (Rocha, I.R.D. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]. Measurements (mm): bd 23.24, pt 2.32, tg 7.53, hf 14.46, ht 15.65.— Head: Narrow in frontal view ( Figure 4C View FIGURE 4 ). Antennae (2.68 mm). Fastigium (0.29 mm). Eyes less protruding than male ( Figures 4C View FIGURE 4 and 5C View FIGURE 5 ). Thorax: Brachypterous (tg / hf 0.521). Tegmina reaching the 5 th abdominal tergite (3.2x the pronotum length). Ventral face of protibiae with 8/8 outer spines and 7/7 inner spines. PrTm1 with approximately 3.0x the length of PrTm2. Ventral face of mesotibiae with 8/8 outer spines and 8/8 inner spines. MsTm1 with approximately 2.0x the length of MsTm2. Dorsal face of metatibiae with 24/25 outer spines and 23/24 inner spines. MtTm1 with approximately 3.0x the length of MtTm2. Abdomen: Posterior-ventral regions of the 8 th abdominal tergite smooth ( Figure 13C View FIGURE 13 ). Epiproct as in the Figure 14C View FIGURE 14 . Length of paraprocts equal to the epiproct. Cerci reaching the distal ⅓ of paraprocts ( Figure 14C View FIGURE 14 ). Subgenital plate: Lateral regions not covered by the ventral portions of the 8 th abdominal tergite ( Figure 15C View FIGURE 15 ); posterior-lateral regions exceeding the length of the 8 th abdominal tergite in lateral view ( Figure 13C View FIGURE 13 ); lateral portions of posterior margin converging to the center with slight inclination and concavity, forming a small triangular protrusion in the apex; spines present only in the median region of posterior margin and inclined toward the central protrusion; surface entirely smooth ( Figure 15C View FIGURE 15 ). Ovipositor as in the Figure 13C View FIGURE 13 . Other characters as in male.

Sexual dimorphism. hf ♀ / hf ♂ 1.22.

Measurements (mm). ♂ (n=14). bd 14.95–16.80 (15.95), pr 1.90–2.18 (2.04), tg 7.79–9.79 (8.85), hf 8.96– 13.09 (11.86), ht 9.31–13.52 (12.37); ♀ (n=1). bd 23.24, pr 2.32, tg 7.53, hf 14.46, ht 15.65.

T. latens (holotype ♂). bd 15.00, pr 2.15, tg 9.30, hf 12.70, ht? ( Rehn & Rehn 1942);

T. latens (allotype ♀). bd 20.50, pr 2.55, tg 8.90, hf 15.00, ht? ( Rehn & Rehn 1942);

Intraspecific variation. Some males may exhibit only one carina well marked on the subgenital plate and the lateral portions of the 9 th abdominal tergite yellow. The R vein of the tegmen can be bifurcated in Ra and Rp.

Material examined. Brazil: Goiás state: 1 ♂ — Brasil, Goiás, SAMA, Minaçú, 30.IX.1986 (Bandeira, M.P.S. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 2 ♂ — Brasil, Goiás, SAMA, Minaçú, 30.IX.1986 (Pamplona, L. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 2 ♂ — Brasil, Goiás, SAMA, Minaçú, 01.X.1986 (Bandeira, M.P.S. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 2 ♂ — Brasil, Goiás, SAMA, Minaçú, 01.X.1986 (Pamplona, L. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 9 ♂ and 1 ♀ — Brasil, Goiás, SAMA, Minaçú, 01.X.1986 (Rocha, I.R. col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 2 ♂ — Brasil, Goiás, SAMA, Minaçú, 31.X.1986 (Ivone col.)\ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2014 [UnB]; 1 ♂ —Serra da Mesa (Probably in the north of Goiás), 4.XI.1996 (D. Halboth)\Caelifera, Acrididae \ T. latens Rehn & Rehn, 1942 , Olivier, R. det. 2015 [DZRJOrt0323].

Distribution. This species is known only from three localities, suggesting a distribution between the central and northwestern regions of Minas Gerais state and central and northern Goiás state, possibly occurring in southern Tocantins state ( Figure 22 View FIGURE 22 ). No records exist for altitudes where specimens were collected. Previous records: Brazil: Minas Gerais: Lassance.