Bidessus apicidens Biström & Sanfilippo, 1986

Bergsten, Johannes, Ranarilalatiana, Tolotra & Biström, Olof, 2020, A new species of Bidessus from Anjozorobe-Angavo and a review of Malagasy Bidessus (Coleoptera, Dytiscidae), European Journal of Taxonomy 720, pp. 1-18 : 3-5

publication ID

https://doi.org/ 10.5852/ejt.2020.720.1109

publication LSID

lsid:zoobank.org:pub:0CF83E89-2532-407B-921F-C05F9A29C68D

DOI

https://doi.org/10.5281/zenodo.4329745

persistent identifier

https://treatment.plazi.org/id/03828798-D377-646C-FDAF-F9CDAE27FC50

treatment provided by

Valdenar

scientific name

Bidessus apicidens Biström & Sanfilippo, 1986
status

 

Bidessus apicidens Biström & Sanfilippo, 1986 View in CoL

Figs 1A View Fig , 3A View Fig

Bidessus apicidens Biström & Sanfilippo, 1986: 46 View in CoL .

Bidessus apicidens View in CoL – Rocchi 1991: 85. — Nilsson 2001: 114. — Nilsson & Hajek 2020: 104.

Diagnostic characters

Head frontally not margined. Slightly posterior to frontal edge with a shallow, transverse depression, which medially is vague but still clearly discernible. Pronotum on disc with fine to very fine and sparse punctures (no clearly impunctate area). Pronotal striae at base strongly impressed; striae sinuate (not angled). Basal elytral striae quite long (length of stria almost half the length of elytra). Sutural lines in part vague; frontally and especially, posteriorly the lines are transformed to rows of punctures. Moreover, posteriorly, sutural row fades away; mixed with ordinary elytra punctures. Punctures on each side of elytral striae unequal; between sutural line and elytral stria punctures quite coarse, dense but somewhat irregularly distributed; outside elytral stria punctures distinctly finer and somewhat sparser. Last ventrite of female with a distinct, medial depression which is delimited by distinct, narrow and longitudinal keels. Female elytra outline posteriorly with a small but distinct, lateral expansion (unique character in Bidessus of Madagascar). Penis in lateral view quite slender, curved but medially slightly straightened. Penis apex not distinctly extended ( Fig. 3A View Fig ).

Length of body 1.7 mm.

Material examined

Paratype

MADAGASCAR • 1 ♀; “envir. de Moramanga” [around Moramanga]; “(Q. 1000 c.a)” [1000 m a.s.l.]; 21 Jul. 1970; N. Sanfilippo leg.; FMNH .

Distribution

Endemic species to Madagascar and only known from around Antsirabe and Moramanga ( Fig. 4D View Fig ). Collecting circumstances poorly known. Sampled at mid (1000 m a.s.l.) and high (1600 m a.s.l.) elevations. Only two specimens are so far known.

FMNH

USA, Illinois, Chicago, Field Museum of Natural History (also used by Finnish Museum of Natural History)

FMNH

Field Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Dytiscidae

Genus

Bidessus

Loc

Bidessus apicidens Biström & Sanfilippo, 1986

Bergsten, Johannes, Ranarilalatiana, Tolotra & Biström, Olof 2020
2020
Loc

Bidessus apicidens

Nilsson A. N. & Hajek J. 2020: 104
Nilsson A. N. 2001: 114
Rocchi S. 1991: 85
1991
Loc

Bidessus apicidens Biström & Sanfilippo, 1986: 46

Bistrom O. & Sanfilippo N. 1986: 46
1986
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF