Micrambe (Neomicrambe), Otero & Pereira, 2019

Otero, José Carlos & Pereira, José Manuel, 2019, Neomicrambe subgen. nov. of Micrambe Thomson, 1863 (Coleoptera: Cryptophagidae) from East Africa, Zootaxa 4674 (1), pp. 47-67 : 49-50

publication ID	https://doi.org/ 10.11646/zootaxa.4674.1.2
publication LSID	lsid:zoobank.org:pub:A53B6E34-5F58-4086-99AE-6AD404531EF6
persistent identifier	https://treatment.plazi.org/id/039D8796-FFE4-D770-B6DB-FE78FA23ADFA
treatment provided by	Plazi
scientific name	Micrambe (Neomicrambe)
status

Treatment

Key to species of the subgenus Neomicrambe

1 Pronotal callosity protruding from the lateral margin of the pronotum, large in size (1/3 of lateral length of pronotum); lateral margins converging in a straight line from the callosity to the base.............................................. 2

- Pronotal callosity not protruding from the lateral margin of the pronotum......................................... 3

2 Reddish brown, in some specimens the disc of the pronotum black; elytra with an elongate spot from the scutellar shield to the apical third of the elytra; head very transverse (WL = 2.0–2.1); antennomeres 2 and 5 equal and 0.7× shorter than 3; antennomeres 6 and 8 equal and 0.6× shorter than 3 ( Fig. 10b View FIGURE 10 ); aedeagus ( Fig. 10c View FIGURE 10 ); paramere ( Fig. 10d View FIGURE 10 ); L = 1.8–1.9 mm ........................................................................................ M. subinfuscata Grouvelle

- Dark grey-brown or yellowish grey-brown; head transverse (WL = 1.8); antennomeres 4 and 6 equal and 1.2× shorter than 3; antennomere 8 small, ovoid and 0.5× shorter than 3 ( Fig. 4b View FIGURE 4 ); aedeagus ( Fig. 4c View FIGURE 4 ); paramere ( Fig. 4d View FIGURE 4 ); L = 1.7–1.9 mm .......................................................................................... M. figurata (Bruce)

3 Tarsal formula 5-5- 5 in both sexes........................................................................ 4

- Tarsal formula 5-5- 4 in males and 5-5- 5 in females........................................................... 7

4 Metathoracic wings well developed; body yellowish grey-brown; elytra with a large dark spot from the base to just posterior to middle and extending along the suture, laterally reaching margins of the elytra; humeral region (including the scutellar shield) and base of the elytra yellowish grey-brown; ventral region dark; antennae and legs yellowish grey-brown; distal region of the tibiae and tarsi dark; antennomeres 7 and 8 equal and slightly shorter than 4 ( Fig. 2b View FIGURE 2 ); aedeagus ( Fig. 2c View FIGURE 2 ); paramere ( Fig. 2d View FIGURE 2 ); L = 2.4–2.9 mm ....................................................................... M. bujukuensis Scott

- Metathoracic wings absent or vestigial.................................................................... 5

5 Pronotum slightly transverse (WL = 1.3–1.5); pronotal callosity large (1/3 lateral length of pronotum).................. 6

- Pronotum moderately transverse (WL = 1.7–1.8) ( Fig. 8a View FIGURE 8 ); pronotal callosity small (1/4 of lateral length of pronotum); body yellowish grey-brown, with dark spot on pronotum disc and elytra; aedeagus ( Fig. 8c View FIGURE 8 ); paramere with the distal area ( Fig. 8d View FIGURE 8 ); L = 1.7–1.8 mm .......................................................................... M. minor (Bruce)

6 Uniformly dark grey-brown; in some species base of the elytra and pronotum laterally reddish; legs and antennae testaceous; antennal club dark; antennomeres 4 and 6 almost equal and 1.4× shorter than 5 ( Fig. 1b View FIGURE 1 ); pronotum ( Fig. 1a View FIGURE 1 ) slightly transverse, subquadrate (WL = 1.3); callosity large (1/3 of lateral length of pronotum); lateral margins parallel from the callosity to just posterior to middle, and from this point converging to the base; aedeagus ( Fig. 1c View FIGURE 1 ); paramere ( Fig. 1e View FIGURE 1 ); L = 2.3–2.4 mm .......................................................................................... M. alluaudi (Scott)

- Variable in colour, elytra usually dark grey-brown; sometimes with a more or less yellowish-brown spot along the suture; pronotum yellowish grey-brown and head of the same colour or dark, although some specimens may be entirely yellowish grey-brown or dark grey-brown; antennomeres 4, 6 and 7 almost equal and 1.8× shorter than 3 ( Fig. 5b View FIGURE 5 ); lateral margins, from the callosity to the basal third, parallel, and from this point converging to the base; aedeagus ( Fig. 5c View FIGURE 5 ); paramere ( Fig. 5d View FIGURE 5 ); L = 1.9–2.3 mm ........................................................................... M. helichrysi (Scott)

7 Metathoracic wings absent; dark grey-brown; many specimens reddish grey-brown along the suture and pronotal base; antennae and legs yellowish grey-brown; antennomeres 4, 5 and 6 almost equal and 0.6× shorter than 1 ( Fig. 6b View FIGURE 6 ); pronotum ( Fig. 6a View FIGURE 6 ) slightly transverse or subquadrate (WL = 1.4); lateral margins, from the callosity to just posterior to middle parallel, then converging towards the base; aedeagus ( Fig. 6c View FIGURE 6 ); paramere ( Fig. 6d View FIGURE 6 ); L = 2.1–2.2 mm ................ M. johnstoni (Scott)

- Metathoracic wings well developed........................................................................8

8 Lateral margins of the pronotum parallel until middle, from there converging to the base............................. 9

- Posterior to the callosity, sides are faintly bisinuate, almost angular in the centre, weakly convergent in front of this point; posterior to it, they converge slightly to the base; pronotum ( Fig. 9b View FIGURE 9 ) slightly transverse or subquadrate (WL = 1.3–1.4); dark grey-brown; head and pronotum dark grey-brown; elytra yellowish grey-brown with dark humeral angles and a spot of the same colour in the middle of the elytra, this spot sometimes extending along the suture; antennae reddish grey-brown; club darker; tibiae and apices of femora reddish grey-brown; aedeagus expanded apically ( Fig. 9e View FIGURE 9 ); paramere with the distal area ( Fig. 9f View FIGURE 9 ); L = 2.5–2.7 mm ........................................................................ M. senecionis Scott

9 Pronotum ( Fig. 3a View FIGURE 3 ) slightly transverse or subquadrate (WL = 1.3–1.4); lateral margins parallel from the callosity to just posterior to middle, from there converging to the base; callosity small (1/4–1/5 of lateral pronotal length); body dark or yellowish grey-brown, antennal club slightly darker; head, pronotum and scutellar shield reddish grey-brown or yellowish grey-brown; aedeagus ( Fig. 3c View FIGURE 3 ); paramere ( Fig. 3d View FIGURE 3 ); L = 2.1–2.3 mm ......................................... M. crateris (Scott)

- Pronotum moderately transverse (WL> 1.4)............................................................... 10

10 Variable in colour, dark grey-brown or blackish, ferrugineous at the base of the elytra; sometimes the apex of the elytra is fer- rugineous and the reddish grey-brown colour may extend along the elytral suture, joining the basal and apical reddish spots; appendages grey-brown, more or less dark; antennomere 1 as long as 5 and 7; pronotum moderately transverse (WL = 1.5–1.6) ( Fig. 7a View FIGURE 7 ); callosity large (1/3 of lateral length of pronotum), not protruding from the lateral margin of the pronotum; face of callosity oval, elongate and visible from above; glandular pore visible; callosity forming an obtuse posterior angle and one of 29º–30º with the body axis; lateral margins from the callosity to the middle parallel, from this point converging to the base; aedeagus ( Fig. 7c View FIGURE 7 ); paramere ( Fig. 7d View FIGURE 7 ); L = 2.5–2.6 mm ......................................... M. kigoensis Scott

- Yellowish grey-brown; antennomeres 6 and 7 almost equal and 0.8× shorter than 3 ( Fig. 11b View FIGURE 11 ); pronotum moderately transverse (WL = 1.5–1.6) ( Fig. 11a View FIGURE 11 ); lateral margins parallel from the callosity to the middle, converging from this point to the base; callosity small (1/4–1/5 of lateral length of pronotum), not protruding from the lateral margin of the pronotum; aedeagus ( Fig. 11c View FIGURE 11 ); paramere ( Fig. 11d View FIGURE 11 ); L = 2.7–2.8 mm ................................................ M. varicolor Grouvelle