Chaetocladius berythensis, Moubayed & Langton, 2019

Moubayed, Joel & Langton, Peter H, 2019, CHAETOCLADIUS BERYTHENSIS SP. N., C. CALLAUENSIS SP. N., C. GUARDIOLEI SP. N. AND C. PARERAI SP. N., FOUR RELICT SPECIES INHABITING GLACIAL SPRINGS AND STREAMS IN EASTERN PYRENEES AND LEBANON (DIPTERA: CHIRONOMIDAE) Abstract, CHIRONOMUS Journal of Chironomidae Research 32 (32), pp. 42-59 : 51

Chaetocladius berythensis sp. n.

Though C. berythensis sp. n. shows, as illustrated in Figs 1 I-N, 2 A-C, a close morphological similarity with the laminatus -group (shape of virga, inferior volsella, and gonostylus), some other unusual relevant characters ( Figs 1 B-C, G-H, M-N; 2 B-C) found in the male adult (structure of sensilla coeloconica on palpomere 3, shape of the dorsal hump on tergite IX, sinuous crista dorsalis consisting of low proximal lobes ending with a larger distal tooth located close to the megaseta, posterior margin of gonostylus with a triangular bare and hyaline expansion located medially) lead us to regard this new species to be a local glacial relict representative of the ‘Levantine Province’. As reported by Moubayed-Breil (2017) and Moubayed-Breil & Bitusik (2019) and based on the previously cited characters, the laminatus -group currently includes 6 known species from Europe and neighbouring areas: C. bitusiki Moubayed, 2019 ; C. coppai Moubayed-Breil, 2017 ; C. elisabethae Makarchenko & Makarchenko, 2018 ; C. guisseti Moubayed, 2017 ; C. laminatus Brundin, 1947 ; C. purbeckensis Langton & Armitage, 2010 . Consequently, the description of C. berythensis sp. n. increases the total number in the laminatus - group to 7.

Figures

Figure 1. Male adult of Chaetocladius berythensis sp. n. A) head, frontal area (right side) with temporal setae; B) palpomere 3 with sensilla clavata and sensilla coeloconica; C) details of sensilla coeloconica; D) clypeus; E) lobes of antepronotum; F) humeral pit; G-H) two aspects of anal point and tergite IX in lateral view; I) hypopygium, dorsal; J) hypopygium, ventral; K) right inferior volsella; L) gonocoxite and inferior volsella, lateral; M) gonostylus, dorsal; N) gonostylus, lateral.