Glyptoma malkini Irmler, Klemann-Junior, Moura & Asenjo, 2025

Glyptoma malkini Irmler, Klemann-Junior, Moura & Asenjo , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:00ECE7D7-22D1-4C70-BB21-24A189D173E8

( Figs 3A–C View FIGURE 3 )

Type material (2♂♂, 1unsexed due to lost abdomen)

Holotype: BRAZIL: ♂, labeled: “Brasil: Para]; Aldeia | Coraci , 12 km W. of Ca- | ninde. R. Gurupi. Leg: | B. Malkin. 24:IV:1963.”, “under | bark”, “Holo- | type”, “ Glyptoma | malkini | det. U. Irmler ” ( FMNH) . Paratypes (1♂, 1 unsexed), labeled: “ Brasil: Para; Aldeia | Coraci, 12 km W. of Ca- | ninde. R. Gurupi. Leg: | B. Malkin. 24: IV:1963.”, “under | bark”, “Para- | type”, “ Glyptoma | malkini | det. U. Irmler ” (1♂, 1 unsexed FMNH) .

Labels abbreviations, translations, and explanations: Para = Pará state; Aldeia | Coraci = Coraci indigenous village; Ca- | ninde.= Canindé Village; R. Gurupi. = Gurupi River .

Diagnosis. Among species of the G. cognatum group (with body length between 1.8 and 3.2 mm, setiferous punctures on the pronotum and elytra at least partly shiny) G. malkini sp. nov. is similar to G. luae sp. nov. and G. nitens in the presence of two rows of punctures in the posterior half of the space between suture and discal carina. However, G. malkini can be differentiated from G. luae sp. nov. and G. nitens by the body length (body length of G. malkini is 2.1 mm; body length of G. luae sp. nov. is 3.0- 3.2 mm; and body length of G. nitens is 2.6–2.9 mm); by the integument of the head appearing matt (shiny in G. luae sp. nov. and G. nitens ); by the slightly elongate punctures on the head (punctures not elongate in G. luae sp. nov. and G. nitens ); by the distinctly wider than long antennomeres 2-10 (slightly wider than long in G. luae sp. nov. and G. nitens ); by the pronotum with dense microsculpturing formed by uniformly distributed micropunctures, appearing matt, and ridges in some parts without microsculpture, appearing shiny (the pronotum of G. luae sp. nov. the shiny integument lacks microsculpture and the surface of the punctures have few micropunctures; in G. nitens the microsculpture is restricted to the surface of punctures and the integument is shiny); by the presence of two parallel regular rows of punctures between suture and discal carina (there are two parallel, irregular rows of punctures in G. nitens ); and by the distinctive shape of the aedeagus. The aedeagus has two sensilla at the base of the median lobe (the median lobe has numerous sensilla in G. luae sp. nov. and G. nitens ); the parameres are narrow (broad in G. nitens ); the parameres are strongly curved (it is slightly sinuate, with a “J” shape, in G. luae sp. nov.).

Description: Holotype male, BL: 2.1 mm, FL: 1.07 mm.

Coloration: black; legs brown.

Head ( Figure 3A View FIGURE 3 ) wider (HW: 0.38 mm) than long (HL:0.26); subrectangular; eyes large, prominent; four times as long as temples; temples narrowed in smooth curve to neck; neck two thirds as wide as head; sides in front of eyes parallel; preocular part as long as length of eyes; anterior margin slightly convex. Head with large and dense setiferous punctation; vertex more densely punctate than clypeus; punctures slightly elongate; vertex with interstices between punctures approximately half as wide as diameter of punctures; surface of interstices and punctures with dense microsculpturing formed by uniformly distributed micropunctures; appearing matt. Neck appearing matt due to dense microsculpture formed by uniformly distributed micropunctures. Antennae ( Figure 3B View FIGURE 3 ) as long as head and pronotum combined; first antennomere approximately quadrate; antennomeres 2–10 distinctly wider than long; antennomere 2 one fourth wider than long; antennomere 10 twice as wide as long; antennomere 11 narrower and longer than antennomere 10; all antennomeres with long yellow apical setae; setae approximately as long as width of antennomeres.

Pronotum ( Figure 3A View FIGURE 3 ) wider (PW: 0.35 mm) than long (PL: 0.32 mm); widest shortly behind anterior angles; anterior half slightly narrowed; posterior half narrowed in deep concave curve to posterior angles; posterior margin slightly concave; surface with deep, coarse, dense setiferous punctuation;; interstices between punctures reduced to narrow ridges; interstices approximately one tenth as wide as diameter of punctures; yellow setae in asymmetric position to centre of punctures; seta in some cases inserted nearly on ridge; dense microsculpturing formed by uniformly distributed micropunctures, appearing matt; ridges in some parts without microsculpture, appearing shiny.

Elytra ( Figure 3A View FIGURE 3 ) longer (EL: 0.49 mm) than wide (EW: 0.43 mm); sides slightly convex; widest close to middle; shoulders well developed and rounded; posterior angles rounded; shoulders not projected forward. Discal carina distinct; slightly curved outward. Lateral carina behind shoulder short and indistinct. Suture marked by a line of six smaller coalescent setiferous punctures. Space between suture and discal carina with two rows of setiferous punctures along entire length of elytra. Space laterad of discal carina with two additional rows of setiferous punctures along entire length of elytra. Each puncture carrying yellow seta; seta in asymmetric position to centre of punctures; interstices between punctures evident as small ridges. Integument of elytra without microsculpture; surface of punctures with dense microsculpturing formed by uniformly distributed micropunctures; appearing shiny.

Legs almost completely covered with yellow setae; surface appearing matt, with microridges organized with cells.

Abdomen with dense, large setiferous punctation; each puncture with yellow seta; insertion of setae slightly asymmetric;interstices between punctures restricted to small ridges.Surface of punctures with dense microsculpturing formed by uniformly distributed micropunctures; surface of ridges between punctures shiny.

Aedeagus as in ( Figure 3C View FIGURE 3 .) In lateral view, paramere curved, with its apex reaching base of 1/3 apical region of median lobe. Median lobe in lateral view curved, bulbous at base with two sensilla, its apical region converging to narrow pointed apex and with elongate tubular endophallus.

Female unknown.

Variation. No variations were observed among the three specimens examined.

Habitat. Collected under bark. The vegetation is Evergreen Tropical Forest.

Distribution. Known from the municipality of Paragominas in Pará State, Brazil.

Etymology. The species name honors the collector of the species, Borys Malkin, who collected Staphylinidae in many Central and South American countries; it is a noun in apposition.