Jurochlus rigor Kalugina, 1985

Lukashevich, Elena D. & Przhiboro, Andrey A., 2012, Pupae of Mesozoic Jurochlus Kalugina, 1985 (Diptera: Chironomidae), with description of four new species, Zootaxa 3478, pp. 434-452 : 438-439

Jurochlus rigor Kalugina, 1985

( Fig. 1 C)

Type material. Holotype: PIN 3053/774 (abdominal segments III–IX of female pupa, Siberia, Uda, Middle or Upper Jurassic).

Additions to description. Upon re-examination of the holotype we confirm that no spines, setae, or their attachment places are visible at lateral margins of any segment; anterior and posterior margins are darkened as in J. sibiricus , but details are less clearly visible; genital sac not visible; probable genital plate IX visible near the anterior margin of the segment IX as an impressed transverse stripe with lateral parts slightly curved anteriorly.

Anal lobes of the segment IX with inner margins nearly straight, outer margins very slightly sinuate; both darkened, with stout dark apical spurs. Outer margin in distal half with short thick denticles.

Measurements. Visible part of abdomen (III–IX) length, 3580; entire body length (extrapolated), 5000–6000. Abdominal segments length/width: V–VII, 500/1250–1380; VIII, 450/1050. Abdominal segment IX: length, 550; width at base, 830; distance between apices of anal lobes, 280.

Figures

FIGURE 1. Holotypes of Jurochlus species (pupae of females): A, B, J. sibiricus Kalugina, 1985: holotype PIN 3053 / 727: A, total view; B, segment IX; C, total view of J. rigor Kalugina, 1985: holotype PIN 3053 / 774; D, total view of J. limbatus sp. nov.: holotype PIN 4270 / 2584; E, total view of J. trivittatus sp. nov.: holotype PIN 4270 / 2581.