Coelometopon madidum Janssens, 1972
A revision of the African hygropetric genus Coelometopon Janssens, and description of Oomtelecopon new genus (Coleoptera: Hydraenidae)
Perkins, Philip D.
Zootaxa
2005
2005-04-20
949
1
1
103
Janssens
Janssens
[264,676,724,750]
Insecta
Hydraenidae
Coelometopon
Animalia
Coleoptera
34
Arthropoda
species
madidum
Coelometopon madidum Janssens, 1972; 391.
Type Material. Holotype(male): Tanzania, Uluguru Montains, "Morning Side"; deposited in the MRAC. [labels: HOLOTYPUS//Tanzanie: Mts Uluguru Morning Side, alt. 1600 m. 21–29/VI/71 sur roche ruisselante// Coll. Mus. Tervuren Mission MtsUluguru L. Berger, N. Leleup J. Debecker V/VIII/71// Prép. Micr. No720117.2// E. Janssensdet., 1972 Coelometopon madidum n. sp.//DIGITAL IMAGE captured 2004 P. D. Perkins].
Diagnosis.Recognized by the very large size, ca. 3.40–4.50 mm(one of the largest species in the family), and the large, sharp tubercles on the pronotal lateral margin (Fig. 47).
Description.Size (length/width, mm x 100) holotype: body (length to elytral apices) 3.42/1.50, head 0.50/0.82, pronotum 0.73/1.22, elytra 2.32/1.50. Dorsum piceous to black, legs dark brown to piceous. Frons with large nongranulate areas, granules near eyes, near ocelli and forming midlongitudinal band of granules in anterior 1/2; anterior margin emarginate, on same plane as clypeus. Clypeus granulate laterally and on very slightly raised area in middle near anterior margin, otherwise smooth and shining. Largest granules of frons and pronotum similar in size. Labrum set beneath margin of clypeus, lobes small, triangular in ventral aspect; area in front of each clypeal angle raised and bearing tuft of setae. Maxillary palpi short, ca. 3/4 width of anterior margin of clypeus, last three articles subequal in length, last article suboval. Mentum with two depressions. Pronotum with large nongranulate areas on disc; sides straight or weakly arcuate in front of and behind widest part; lateral depressions very wide, strongly tuberculate at lateral margin, otherwise sparsely granulate, nongranulate surfaces shining; small, nearly oval fovea posteriorly. Median groove location demarcated by nearly parallel bands of granules, each band two or three granules wide; interior of groove area granulate in anterior and posterior depression, shining and virtually flat on nongranulate middle area; two low, granulate callosities on each side of median groove. Elytral serial punctures small, deep, closely spaced serially, width ca. 1/3 width of intervals; granules separating serial punctures prominent, length only slightly less than that of punctures. Elytral intervals: even numbered intervals with long granulate callosities, all mostly similar in height, 4 on 2nd, 3 on 4th, and ca. 5 on 6th, intercallosity areas smooth, shining; oddnumbered intervals each with unilinear row of granules; lateral margin in dorsal aspect formed by granules on raised 8th interval (pseudoepipleuron). Prosternum with low midlongitudinal carina. Mesosternal process transverse, narrow, margin arcuate. Metasternum strongly carinate behind mesocoxae; midlongitudinal fovea in basal 0.75 wide, deep; disc on each side of fovea sparsely finely punctate, weakly shining; lateral 1/3 very coarsely punctate; posterior margin depressed in front of metacoxae. Abdomen with intercoxal sternite and adjacent part of first ventrite conjointly deeply concave; intersegmental areas deeply impressed. Sixth ventrite in male shallowly impressed medially; in female very weakly tumid in basal 1/2, apically strongly arcuate. Female differing from male in following: pronotal disc more humped, foveae deeper and median groove wider; elytral callosities slightly larger; elytral 8th interval (pseudoepipleuron) anterior 1/ 2 inlateral aspect markedly more sinuate. Female last tergite apical margin arcuate with very faint apicomedian emargination, fringed with row of strong spines; males lacking spines. Protibiae sexually dimorphic, in male more strongly built and with ventral surface sinuate and distal 1/2 slightly concave and with row of long setae; mesotibia of male also dimorphic, sinuate, but much less so than protibia. Aedeagus length ca. 1.20 mm; distal area enlarged, complex; membranous process spinose, large, expandable; presumed gonopore process distally wide and thin; parameres sinuate, joined near base of mainpiece, attaining proximal part of enlarged distal area; mainpiece with internal sclerotized parts (pumping mechanism?) (Fig. 48). Holotypeaedeagus flattened and distorted by slide mounting.
Distribution.Currently known only from the typelocality in the Uluguru Mountains of Tanzania(Fig. 86).
MRAC
Mus. Tervuren Mission Mts Uluguru L. Berger, N & Mission Mts Uluguru L. Berger, N. & Leleup J. Debecker V & Prep. Micr. No & P. D. Perkins
Tanzania
Mts Uluguru
E. Janssens
1600
Mts Uluguru Morning Side
Coll. Mus. Tervuren Mission Mts
34
2
holotype