search.noResults

search.searching

note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
764


Journal of Paleontology 89(5):762–767


Figure 3. Derolathrus groehni n. sp., paratype: (1) dorsal view, under normal light; (2) ventral view, under normal light; (3) dorsal view, micro-CT scan; (4) ventral view, micro-CT scan. Scale bars represent 200 µmin(1) and (2).


Diagnosis.—Rugose microsculpture present on dorsal surfaces of head and pronotum, weaker microsculpture present on elytra; head with four aligned rows of small, non-setiferous punctures, temples well developed, vertex with a rim and lacking a basal fovea; eyes large, each eye with about 15 ommatidia; club 1-segmented with distinct sensory area about half the length of the club; pronotum about 1.4 times as long as wide and weakly constricted at base, disc with fine, dense, non-setiferous punctures and an elongate longitudinal median groove; elytra with nearly complete sutural striae, discal striae absent; hind wings well developed; abdominal ventrite I distinctly longer than ventrite II.


Occurrence.—Baltic amber, middle Eocene (ca. 37–54.5 Ma; Ritzkowsky, 1997).


Description.—Body 0.90mm long. Shape subcylindrical, dorsoventrally compressed, narrowly elongate (Fig. 1). Body color dark brown; surface mostly shiny with dorsal and ventral surfaces punctate and rugose microsculpture present on dorsal surfaces of head and pronotum. Head oval, slightly deflexed, 0.18mm long, broadest across


eyes, 0.15mm wide, distinctly constricted behind eyes with well- developed temples; dorsally covered with four longitudinally aligned rows of small non-setiferous punctures (Fig. 4.1); ridge on vertex, basal fovea absent. Labrum small, deflexed. Mandibles


small. Maxillary palps with apical palpomere aciculate, penulti- mate palpomere larger, swollen. Gular sutures not visible. Eyes large, laterally protruding; their diameter slightly longer than the distance from their anterior margin to antennal insertion; consisting of about 15 ommatidia. Antenna with 10 antennomeres; basal antennomere and antennal insertion concealed from above; antennomere 2 elongate, distinctly wider than antennomere 3, about two times as along as antennomere 3; antennomeres 3–8 moniliform; club 1-segmented with distinct sensory area about half the length of the club and demarked by a visible rim. Prothorax as wide as head, 0.22mm long and 0.16mm


wide, about 1.4 times as long as wide, narrower than elytra, widest in anterior third, tapering weakly to hind margin, which is narrower than anterior margin and weakly constricted at base; dorso-lateral edge with complete carina; pronotum covered with a few short setae; disc with shallow longitudinal median groove (Fig. 4.1, 4.2); prosternum broad, weakly punctate; prosternal process long, with rounded apex slightly extending beyond globular. Mesoventrite densely punctate, process broad, apex rounded between mesocoxal cavities (Fig. 4.4). Mesocoxae globular, slightly closer than procoxae. Metaventrite about 3.5 times as long as mesoventrite, slightly convex, without discrimen. Metacoxae widely separated. Trochanters large, trapezoidal, gradually widened to apex. Femora slender and robust. Tibiae gradually widened to apex, apical spurs not


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212