Leielmis armipes

Bilton, David T., 2018, A new species of Leielmis Delève, 1964, with a revised key to members of the genus (Coleoptera: Elmidae), Zootaxa 4441 (3), pp. 592-596: 592-593

publication ID

10.5281/zenodo.1301566

publication LSID

lsid:zoobank.org:pub:A8A31BCB-64DE-406C-9F82-26A4882FD89D

persistent identifier

http://treatment.plazi.org/id/03C987EF-1567-3D40-E4DA-DFBEFC3AF4FF

treatment provided by

Plazi

scientific name

Leielmis armipes
status

sp. nov.

Leielmis armipes  sp. nov. ( Figs 1-2View FIGURE 1View FIGURE 2)

Type locality. South Africa, WeStern Cape, HeXrivier mountainS, Small Stream in Green Gulley below MoStertShoek TwinS, 1,200 m, 33° 28’ 26.64”S 19° 17’ 14.54”E ( Fig. 2C View Figure ).GoogleMaps 

Type material. Holotype (male): “ 14/ii/2017 South Africa WC// HeXrivierberge, Green Gulley // 1, 200 m, MoStertShoek TwinS// 33° 28’ 26.64”S 19° 17’ 14.54”E // Small Stream D T Bilton leg.” (genitalia eXtracted and mounted in DMHF on Same card) and red holotype label “ Leielmis armipes  // Holotype // D T Bilton 2018 ” ( AMGAbout AMG).

Paratypes (18) 6 ♂ 4 ♀ same data as holotype ( CDTB, ISAM, NMWAbout NMW, SANCAbout SANC, TMSAAbout TMSA)  ; 4 ♂ 4 ♀ “ 14/ii/2017 South Africa WC// HeXrivierberge , Green Gulley // 1, 320 m, MoStertShoek TwinS// 30° 28’ 20.86”S 19° 17’ 14.61”E // Small Stream D T Bilton leg.” ( AMGAbout AMG, CDTB, ISAM). All with red paratype labelS “ Leielmis armipes  // Paratype // D T Bilton 2018”.GoogleMaps 

Description. Size: Holotype: body length (front of pronotum to elytral apiceS) 1.65 mm; maXimum width (elytra) 1.0 mm; elytral length 1.10 mm. Same valueS for paratypeS: 1.50–1.60 mm, 1.0– 1.10 mm and 1.0– 1.15 mm reSpectively.

Colour: DorSum ( Fig. 1A View Figure ) dark brown to black, paleSt at anterior margin of pronotum and apeX of labrum. LegS reddiSh brown. Antennae dark yellow, Segment 11 infuScated. MaXillary palpi reddiSh brown; cardo and StipeS yellow. Labial palpi Straw yellow. Venter reddiSh brown; mentum paler; ligula yellow.

Head: Triangular, narrowed to apeX. Labrum triangular, with acuminately rounded apeX; approXimately 0.7X aS wide aS clypeuS, 0.5X aS long; weakly microreticulate, granulate and cloSely punctate, punctureS bearing curved, recumbent Setae. ClypeuS alSo Shining, weakly microreticulate and finely granulate and punctate, punctureS bearing curved, recumbent Setae. Frontoclypeal Suture feebly impreSSed; weakly arcuate. FronS Shining, with moderate, medium punctureS, bearing curved, recumbent Setae; moderately, coarSely granulate and microreticulate. EyeS occupying approXimately half Side of head; rounded anteriorly, relatively flat laterally and poSteriorly. MaXillary palpi with Segment 3 flat and eXpanded laterally, approXimately 2X broader and longer than Segment 4. Labial palpi with Segment 2 flat and eXpanded laterally, Segment 3 narrower and Shorter.

Pronotum: TranSverSe, 1.6X broader than long; broadeSt at poSterior margin, narrowing Strongly to front angleS; poSterior margin approXimately 1.2X width of anterior. Arched, anterior margin broadly arcuate in middle, forming a hood, which ShieldS much of the head. PoSterior margin biSinuate around centre. Lateral marginS Strongly bordered, weakly rounded. Anterior angleS acute; poSterior angleS obtuSely rounded. Surface ( Fig. 1B View Figure ) Shining, without evident microreticulation; doubly punctate, with SparSe, medium punctureS, interSperSed with moderate, fine punctureS, larger punctureS approXimately 3– 4X diameter of Smaller oneS. CoarSe punctureS bearing long, fine, golden, recumbent to decumbent Setae. CoarSely granulate between punctureS, eXcept on diSc.

Elytra: Slightly elongate, broadeSt approXimately one third of the diStance behind Shoulder, narrowing Strongly in poSterior third, to acuminately rounded apeX. PunctureS of rowS ( Fig. 1B View Figure ) widely Spaced, relatively evenly Sized throughout length. Puncture rowS 1–5 weakly Striate impreSSed on diSc; not Striate impreSSed behind middle and obSolete towardS apeX. IntervalS relatively flat ( Fig. 1B View Figure ), Shining, with microreticulation reduced to tranSverSe wrinkleS; finely punctate, punctureS bearing fine, golden, recumbent Setae; interval punctureS of two SizeS, fine and very fine, fine punctureS arranged in irregular rowS. Surface coarSely granulate poSterolaterally. Scutellum elongate, Shining, with no evident microreticulation; SparSely and finely punctate.

Venter: Entire Surface with denSe plaStron veStiture, eXcept poSterior genae and central portion of metaventrite and abdominal ventriteS 1–4; thoraX and abdomen with medium, curved, golden, recumbent Setae and rounded to elongateoval, coarSe, Shining granuleS. Anterior proSternal emargination relatively deep, v-Shaped. ProSternal proceSS approXimately 1.25X length of anterior portion of proSternum; quadrate, with raiSed lateral marginS and cloSe, mediumcoarSe punctureS; abruptly narrowing to bluntly acuminate apeX. Fovea at junction of meSo and metaventriteS Small and circular. Metaventrite ( Fig. 2A View Figure ) Shining, with no viSible microreticulation and medium, moderate punctureS. Sternite 9 with poSterior portion 2.5X length of anterior median Strut.

LegS: MeSo and metatibiae with characteriStic modificationS ( Fig. 1C View Figure ).

AedeaguS. PhallobaSe relatively Short, 0.6X length of peniS. PeniS longer than paramereS, curved apically in lateral view, with truncately acuminate apeX. ParamereS narrow, with Slightly incurved, rounded apiceS, and Slightly curved interior marginS (See Fig. 1D View Figure ).

FemaleS: AS maleS, eXcept for Slightly Shallower meSoventral concavity and lack of tibial modificationS. OvipoSitor elongate, diStal gonocoXite with relatively narrow apiceS ( Fig. 1E View Figure ); 0.7X length of proXimal gonocoXite.

Variation: SpecimenS vary in the degree to which they retain dorSal Setae and granuleS, both of which are apparently worn off in Some individualS.

Differential diagnosis. The SpecieS iS morphologially cloSe to L. georyssoides  and L. gibbosus  , from which it iS moSt reliably diStinguShed on the baSiS of the prominent internal Spine on the male metatibia ( Fig. 1C View Figure ), a character entirely abSent in both theSe SpecieS. It alSo differS from theSe taXa in itS Somewhat paler colouration (dorSum, venter and appendageS), the SparSer punctation on the pronotum and venter (particularly on the metaventrite – See Fig. 2A–B View Figure ), and the more widely Spaced punctureS of the elytral SerieS. The male genitalia are cloSeSt to L. georyssoides  , but differ from thiS SpecieS in the Stouter, Shorter peniS apeX, which doeS not project aS far beyond the paramereS. The diStal gonocoXite of femaleS haS narrower apiceS than Seen in L. georyssoides  .

Distribution and ecology. So far known from a Single high altitude permanent Stream in the HeXrivier mountainS, WeStern Cape Province, South Africa. Here it occurred together with the relatively wideSpread L. gibbosus  .

Etymology. Named in reference to the modificationS to the male metatibiae.

AMG

Albany Museum

NMW

Naturhistorisches Museum, Wien

SANC

Agricultural Research Council-Plant Protection Research Institute

TMSA

Transvaal Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Elmidae

Genus

Leielmis